CN109873113B - Lithium battery structure and lithium battery negative electrode foil - Google Patents

Abstract

The present invention discloses a lithium battery structure and a lithium battery negative electrode foil thereof. The lithium battery negative electrode foil comprises a base material layer, a first material layer and a second material layer. The first material layer is formed on the base material layer. The second material layer comprises a plurality of particle structure groups formed inside the first material layer. Each particle structure group comprises a plurality of particle structures connected to each other. One of the first material layer and the second material layer is formed of 100% pure silicon material without impurities, and the other of the first material layer and the second material layer is formed of 100% pure carbon material without impurities. Thus, the present invention can improve the structural strength and ion transmission efficiency of the lithium battery structure and the lithium battery negative electrode foil by using a plurality of particle structures connected to each other.

Description

Lithium battery structure and lithium battery negative electrode foil

technical field

The present invention relates to a battery structure and its electrode foil, in particular to a lithium battery structure and its negative electrode foil for the lithium battery.

Background technique

Today's portable electronic products, such as digital cameras, mobile phones, notebook computers, etc., all need to be equipped with lightweight batteries. Among all kinds of batteries, the unit weight of rechargeable lithium batteries can provide three times more power than traditional batteries (such as lead-acid batteries, nickel-hydrogen batteries, nickel-zinc batteries, nickel-cadmium batteries), and lithium batteries also have rechargeable batteries. Advantages of fast charging. However, the lithium battery in the prior art still has room for improvement, especially the negative electrode foil used in the lithium battery.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a lithium battery structure and a lithium battery negative electrode foil in view of the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a negative electrode foil for a lithium battery, which includes: a base material layer, a first material layer and a second material layer. The first material layer is formed on the base material layer. The second material layer includes a plurality of particle structure groups formed inside the first material layer, and each of the particle structure groups includes a plurality of particle structures connected to each other. Wherein, one of the first material layer and the second material layer is formed of impurity-free 100% pure silicon material, and both the first material layer and the second material layer are The other one is formed from impurity-free 100% pure carbon material.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a lithium battery structure, the lithium battery structure is a cylindrical lithium battery, a square lithium battery using a negative electrode foil of a lithium battery , A button-type lithium battery or a thin-film lithium battery, wherein the negative electrode foil of the lithium battery comprises: a base material layer, a first material layer and a second material layer. The first material layer is formed on the base material layer. The second material layer includes a plurality of particle structure groups formed inside the first material layer, and each of the particle structure groups includes a plurality of particle structures connected to each other. Wherein, one of the first material layer and the second material layer is formed of impurity-free 100% pure silicon material, and both the first material layer and the second material layer are The other one is formed from impurity-free 100% pure carbon material.

Further, the base material layer is a Cu material layer or an Al material layer, and the first material layer and the second material layer are simultaneously formed by co-evaporation or co-sputtering in a vacuum environment.

Further, when the first material layer is formed of impurity-free 100% pure silicon material, and the second material layer is formed of impurity-free 100% pure carbon material, the 100% pure The carbon material can be fabricated into a plurality of the granular structures, and the 100% pure silicon material can be used as a coating material for the granular structures.

Further, when the second material layer is formed of impurity-free 100% pure silicon material, and the first material layer is formed of impurity-free 100% pure carbon material, the 100% pure The silicon material can be fabricated into a plurality of the granular structures, and the 100% pure carbon material can be used as a coating material for the granular structures.

Further, in each of the particle structure groups, each particle structure is connected to one or more adjacent particle structures to form a continuous stack structure, and the negative electrode foil of the lithium battery is Structural strength and ion transport efficiency can be improved by the continuous stack structure.

Still further, at least one of the plurality of particle structures of the group of particle structures contacts the base material layer, and at least another one of the plurality of particle structures of the group of particle structures contacts the first material The outer surface of the layer is exposed from the outer surface of the first material layer.

Still further, at least one of the plurality of particle structures of the group of particle structures contacts the base material layer, and the plurality of particle structures of the group of particle structures and the outer surface of the first material layer are separated from each other without contact.

Still further, the plurality of particle structures of the group of particle structures and the base material layer are separated from each other without contacting each other, and at least one of the plurality of particle structures of the group of particle structures is in contact with the first material The outer surface of the layer is exposed from the outer surface of the first material layer.

Further, the plurality of particle structures of the particle structure group and the base material layer are separated from each other without contacting each other, and the plurality of particle structures of the particle structure group and the outer surface of the first material layer are each other Separate without touching.

One of the beneficial effects of the present invention is that, in the lithium battery structure and its negative electrode foil for the lithium battery provided by the present invention, the second material layer includes a plurality of particles formed inside the first material layer. structure groups, each said particle structure group comprising a plurality of particle structures connected to each other" and "one of said first material layer and said second material layer is made of 100% pure formed of silicon material, and the other one of the first material layer and the second material layer is formed of impurity-free 100% pure carbon material" to improve the negative electrode of the lithium battery Structural strength and ion transport efficiency of foils.

For further understanding of the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only for reference and description, not for limiting the present invention.

Description of drawings

FIG. 1 is a schematic diagram of a negative electrode foil of a lithium battery according to a first embodiment of the present invention.

FIG. 2 is an enlarged schematic view of the negative electrode foil of the lithium battery according to the first embodiment of the present invention.

FIG. 3 is an enlarged schematic view of the negative electrode foil of the lithium battery according to the second embodiment of the present invention.

FIG. 4 is an enlarged schematic view of the negative electrode foil of the lithium battery according to the third embodiment of the present invention.

5 is an enlarged schematic view of a negative electrode foil for a lithium battery according to a fourth embodiment of the present invention.

FIG. 6 is a schematic diagram of the structure of the first lithium battery according to the fifth embodiment of the present invention.

FIG. 7 is a schematic diagram of the structure of a second lithium battery according to the fifth embodiment of the present invention.

FIG. 8 is a schematic diagram of a third lithium battery structure according to the fifth embodiment of the present invention.

FIG. 9 is a schematic diagram of a fourth lithium battery structure according to the fifth embodiment of the present invention.

Detailed ways

The following are specific examples to illustrate the embodiments of the “lithium battery structure and its negative electrode foil for lithium batteries” disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another component, or one signal from another. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

first embodiment

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a schematic diagram of a negative electrode foil for a lithium battery according to a first embodiment of the present invention. FIG. 2 is an enlarged schematic view of the negative electrode foil of the lithium battery according to the first embodiment of the present invention. The first embodiment of the present invention provides a negative electrode foil F for a lithium battery, which includes: a base material layer 1 , a first material layer 2 and a second material layer 3 .

Furthermore, as shown in FIG. 1 and FIG. 2 , the first material layer 2 is formed on the base material layer 1 , and the second material layer 3 includes a plurality of particle structure groups 30 formed inside the first material layer 2 . , and each particle structure group 30 includes a plurality of particle structures 300 connected to each other. For example, the base material layer 1 can be a Cu material layer, an Al material layer or any conductive material layer, and the first material layer 2 and the second material layer 3 can be co-evaporated (co-evaporation) in a vacuum environment at the same time. evaporating) or co-sputtering (co-sputtering) processing methods. However, the present invention is not limited to the above-mentioned examples. For example, the first material layer 2 and the second material layer 3 may be formed by sequential evaporation in a vacuum environment at the same time.

Furthermore, as shown in FIG. 1 , one of the first material layer 2 and the second material layer 3 is formed of impurity-free 100% pure silicon material, and the first material layer 2 and the second material layer 3 are formed of impurity-free 100% pure silicon material. The other of the two material layers 3 is formed of a 100% pure carbon material without impurities. That is to say, according to different requirements, the first material layer 2 can be formed of 100% pure silicon material without impurities, or formed of 100% pure carbon material without impurities, and the second material layer 3 can also be formed It is formed of 100% pure silicon material without impurities, or 100% pure carbon material without impurities, but the materials used to make the first material layer 2 and the second material layer 3 must be two different materials s material.

For example, as shown in FIG. 1 and FIG. 2 , when the first material layer 2 is formed of impurity-free 100% pure silicon material, and the second material layer 3 is formed of impurity-free 100% pure carbon material At the same time, 100% pure carbon material can be made into a plurality of particle structures 300 , and 100% pure silicon material can be used as a coating material of the plurality of particle structures 300 . However, the present invention is not limited to the above-mentioned examples.

For example, as shown in FIG. 1 and FIG. 2 , when the second material layer 3 is formed of impurity-free 100% pure silicon material, and the first material layer 2 is formed of impurity-free 100% pure carbon material At the same time, 100% pure silicon material can be made into a plurality of particle structures 300 , and 100% pure carbon material can be used as a coating material for the plurality of particle structures 300 . However, the present invention is not limited to the above-mentioned examples.

It is worth noting that, as shown in FIG. 2 , at least one of the plurality of particle structures 300 in the particle structure group 30 (for example, the bottommost particle structure 300 ) will contact the base material layer 1 , and most of the particle structure groups 30 are in contact with the base material layer 1 . At least another one of the particle structures 300 (eg, the topmost particle structure 300 ) will contact the outer surface 200 of the first material layer 2 and be exposed from the outer surface 200 of the first material layer 2 .

Therefore, as shown in FIG. 2 , in each particle structure group 30 , each particle structure 300 is connected to one or more adjacent particle structures 300 (that is, each particle structure 300 is connected to at least one particle structure 300 ). In a particle structure 300, there will be no single and independent situation) to form a continuous stack structure S, so the structural strength and ion transmission efficiency of the negative electrode foil F of the lithium battery can be improved by the continuous stack structure S. It can be effectively improved by use, and of course, it can also improve the storage space of ions.

Second Embodiment

Please refer to FIG. 3 , which is an enlarged schematic view of the negative electrode foil of the lithium battery according to the second embodiment of the present invention. The second embodiment of the present invention provides a negative electrode foil F for a lithium battery, which includes: a base material layer 1 , a first material layer 2 and a second material layer 3 . As can be seen from the comparison between FIG. 3 and FIG. 2 , the biggest difference between the second embodiment of the present invention and the first embodiment is that in the second embodiment, at least one of the plurality of particle structures 300 in the particle structure group 30 (for example, The bottommost particle structure 300 ) contacts the base material layer 1 , and the plurality of particle structures 300 of the particle structure group 30 and the outer surface 200 of the first material layer 2 are separated from each other without contact.

Therefore, as shown in FIG. 3 , in each particle structure group 30, each particle structure 300 is connected to one or more adjacent particle structures 300 (that is, each particle structure 300 is connected to at least one particle structure 300). In a particle structure 300, there will be no single and independent situation) to form a continuous stack structure S, so the structural strength and ion transmission efficiency of the negative electrode foil F of the lithium battery can be improved by the continuous stack structure S. It can be effectively improved by use, and of course, it can also improve the storage space of ions.

Third Embodiment

Please refer to FIG. 4 , which is an enlarged schematic view of a negative electrode foil for a lithium battery according to a third embodiment of the present invention. The third embodiment of the present invention provides a negative electrode foil F for a lithium battery, which includes: a base material layer 1 , a first material layer 2 and a second material layer 3 . As can be seen from the comparison between FIG. 4 and FIG. 2 , the biggest difference between the third embodiment of the present invention and the first embodiment is that in the third embodiment, the plurality of particle structures 300 of the particle structure group 30 and the base material layer 1 are in contact with each other. are separated from each other without contacting each other, and at least one of the plurality of particle structures 300 of the particle structure group 30 (eg, the topmost particle structure 300 ) will contact the outer surface 200 of the first material layer 2 200 of the outer surfaces are exposed.

Therefore, as shown in FIG. 4 , in each particle structure group 30 , each particle structure 300 is connected to one or more adjacent particle structures 300 (that is, each particle structure 300 is connected to at least one particle structure 300 ). In a particle structure 300, there will be no single and independent situation) to form a continuous stack structure S, so the structural strength and ion transmission efficiency of the negative electrode foil F of the lithium battery can be improved by the continuous stack structure S. It can be effectively improved by use, and of course, it can also improve the storage space of ions.

Fourth Embodiment

Please refer to FIG. 5 , which is an enlarged schematic view of a negative electrode foil for a lithium battery according to a fourth embodiment of the present invention. The fourth embodiment of the present invention provides a negative electrode foil F for a lithium battery, which includes: a base material layer 1 , a first material layer 2 and a second material layer 3 . As can be seen from the comparison between FIG. 5 and FIG. 2 , the biggest difference between the fourth embodiment of the present invention and the first embodiment is that in the fourth embodiment, the plurality of particle structures 300 of the particle structure group 30 and the base material layer 1 will meet each other. are separated from each other without contact, and the plurality of particle structures 300 of the particle structure group 30 and the outer surface 200 of the first material layer 2 are separated from each other without contact.

Thereby, as shown in FIG. 5 , in each particle structure group 30 , each particle structure 300 is connected to one or more adjacent particle structures 300 (that is, each particle structure 300 is connected to at least one particle structure 300 ). In a particle structure 300, there will be no single and independent situation) to form a continuous stack structure S, so the structural strength and ion transmission efficiency of the negative electrode foil F of the lithium battery can be improved by the continuous stack structure S. It can be effectively improved by use, and of course, it can also improve the storage space of ions.

Fifth Embodiment

Please refer to FIGS. 6 to 9 . FIG. 6 is a schematic diagram of the structure of the first lithium battery according to the fifth embodiment of the present invention. FIG. 7 is a schematic diagram of the structure of a second lithium battery according to the fifth embodiment of the present invention. FIG. 8 is a schematic diagram of a third lithium battery structure according to the fifth embodiment of the present invention. FIG. 9 is a schematic diagram of a fourth lithium battery structure according to the fifth embodiment of the present invention. The fifth embodiment of the present invention provides a lithium battery structure. The lithium battery structure can be a cylindrical lithium battery B1 (as shown in FIG. 6 ) and a square lithium battery B2 (as shown in FIG. 6 ) using a lithium battery negative electrode foil F. 7), a button-type lithium battery B3 (as shown in FIG. 8), or a thin-film lithium battery B4 (as shown in FIG. 9), and the lithium battery negative electrode foil F can use the first to fourth embodiments any of them.

Thereby, since the structural strength, ion transmission efficiency and ion storage space of the negative electrode foil F of the lithium battery can be effectively improved by using the continuous stack structure S, the structural strength of the lithium battery structure, the lithium ion (lithiumion) The transmission efficiency and the storage space of lithium ions can be effectively improved by using the negative electrode foil F of the lithium battery.

Beneficial Effects of Embodiments

One of the beneficial effects of the present invention is that the lithium battery structure and the lithium battery negative electrode foil F provided by the present invention can pass through the “second material layer 3 including a plurality of particle structures formed inside the first material layer 2”. Groups 30, and each particle structure group 30 includes a plurality of particle structures 300" connected to each other and "one of the first material layer 2 and the second material layer 3 is made of impurity-free 100% pure silicon material, and the other one of the first material layer 2 and the second material layer 3 is formed of impurity-free 100% pure carbon material” to improve the structural strength of the negative electrode foil F for lithium batteries and ion transport efficiency. That is, the present invention can improve the structural strength and ion transmission efficiency of the lithium battery structure and the lithium battery negative electrode foil F by using a plurality of particle structures connected to each other.

The content disclosed above is only a preferred feasible embodiment of the present invention, and is not intended to limit the protection scope of the claims of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and the accompanying drawings of the present invention are included in the present invention. within the scope of protection of the claims of the invention.

Claims (10)

1. A negative electrode foil for a lithium battery, comprising:

a base material layer;

a first material layer formed on the base material layer; and

a second material layer, the second material layer comprising a plurality of grain structure groups formed inside the first material layer, each grain structure group comprising a plurality of grain structures connected to each other, the plurality of grain structures connected to each other forming a continuous stacked structure;

wherein one of the first material layer and the second material layer is formed of an impurity-free 100% pure silicon material, and the other of the first material layer and the second material layer is formed of an impurity-free 100% pure carbon material.

2. The negative electrode foil for a lithium battery as claimed in claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and the first material layer and the second material layer are formed by co-evaporation or co-sputtering in a vacuum environment; wherein at least one of the plurality of granular structures of the group of granular structures contacts the layer of base material and at least another of the plurality of granular structures of the group of granular structures contacts the outer surface of the layer of first material to be exposed from the outer surface of the layer of first material; wherein when the first material layer is formed of an impurity-free 100% pure silicon material and the second material layer is formed of an impurity-free 100% pure carbon material, the 100% pure carbon material can be fabricated into a plurality of the grain structures, and the 100% pure silicon material can be used as a cladding material for the plurality of the grain structures; wherein when the second material layer is formed of an impurity-free 100% pure silicon material and the first material layer is formed of an impurity-free 100% pure carbon material, the 100% pure silicon material can be fabricated into a plurality of the grain structures, and the 100% pure carbon material can be used as a coating material for the plurality of the grain structures; wherein, in each particle structure group, each particle structure is connected with one or more adjacent particle structures to form the continuous stacking structure, and the structural strength and the ion transmission efficiency of the negative electrode foil of the lithium battery can be improved through the continuous stacking structure.

3. The negative electrode foil for a lithium battery as claimed in claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and the first material layer and the second material layer are formed by co-evaporation or co-sputtering in a vacuum environment; wherein at least one of the plurality of granular structures of the group of granular structures contacts the layer of base material and the plurality of granular structures of the group of granular structures and the outer surface of the layer of first material are separated from each other without contacting; wherein when the first material layer is formed of an impurity-free 100% pure silicon material and the second material layer is formed of an impurity-free 100% pure carbon material, the 100% pure carbon material can be fabricated into a plurality of the grain structures, and the 100% pure silicon material can be used as a cladding material for the plurality of the grain structures; wherein when the second material layer is formed of an impurity-free 100% pure silicon material and the first material layer is formed of an impurity-free 100% pure carbon material, the 100% pure silicon material can be fabricated into a plurality of the grain structures, and the 100% pure carbon material can be used as a coating material for the plurality of the grain structures; wherein, in each particle structure group, each particle structure is connected with one or more adjacent particle structures to form the continuous stacking structure, and the structural strength and the ion transmission efficiency of the negative electrode foil of the lithium battery can be improved through the continuous stacking structure.

4. The negative electrode foil for a lithium battery as claimed in claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and the first material layer and the second material layer are formed by co-evaporation or co-sputtering in a vacuum environment; wherein the plurality of particle structures of the group of particle structures and the base material layer are separated from each other without contacting, and at least one of the plurality of particle structures of the group of particle structures contacts the outer surface of the first material layer to be exposed from the outer surface of the first material layer; wherein when the first material layer is formed of an impurity-free 100% pure silicon material and the second material layer is formed of an impurity-free 100% pure carbon material, the 100% pure carbon material can be fabricated into a plurality of the grain structures, and the 100% pure silicon material can be used as a cladding material for the plurality of the grain structures; wherein when the second material layer is formed of an impurity-free 100% pure silicon material and the first material layer is formed of an impurity-free 100% pure carbon material, the 100% pure silicon material can be fabricated into a plurality of the grain structures, and the 100% pure carbon material can be used as a coating material for the plurality of the grain structures; wherein, in each particle structure group, each particle structure is connected with one or more adjacent particle structures to form the continuous stacking structure, and the structural strength and the ion transmission efficiency of the negative electrode foil of the lithium battery can be improved through the continuous stacking structure.

5. The negative electrode foil for a lithium battery as claimed in claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and the first material layer and the second material layer are formed by co-evaporation or co-sputtering in a vacuum environment; wherein the plurality of particle structures of the group of particle structures and the base material layer are separated from each other and do not contact each other, and the plurality of particle structures of the group of particle structures and the outer surface of the first material layer are separated from each other and do not contact each other; wherein when the first material layer is formed of an impurity-free 100% pure silicon material and the second material layer is formed of an impurity-free 100% pure carbon material, the 100% pure carbon material can be fabricated into a plurality of the grain structures, and the 100% pure silicon material can be used as a cladding material for the plurality of the grain structures; wherein when the second material layer is formed of an impurity-free 100% pure silicon material and the first material layer is formed of an impurity-free 100% pure carbon material, the 100% pure silicon material can be fabricated into a plurality of the grain structures, and the 100% pure carbon material can be used as a coating material for the plurality of the grain structures; wherein, in each particle structure group, each particle structure is connected with one or more adjacent particle structures to form the continuous stacking structure, and the structural strength and the ion transmission efficiency of the negative electrode foil of the lithium battery can be improved through the continuous stacking structure.

6. A lithium battery structure, said lithium battery structure being a cylindrical lithium battery, a square lithium battery, a button lithium battery or a thin film lithium battery using a lithium battery negative electrode foil, said lithium battery negative electrode foil comprising:

a base material layer;

a first material layer formed on the base material layer; and

a second material layer, the second material layer comprising a plurality of grain structure groups formed inside the first material layer, each grain structure group comprising a plurality of grain structures connected to each other, the plurality of grain structures connected to each other forming a continuous stacked structure;

wherein one of the first material layer and the second material layer is formed of an impurity-free 100% pure silicon material, and the other of the first material layer and the second material layer is formed of an impurity-free 100% pure carbon material.

7. The lithium battery structure as claimed in claim 6, wherein at least one of the plurality of particle structures of the particle structure group contacts the base material layer, and at least another one of the plurality of particle structures of the particle structure group contacts the outer surface of the first material layer to be exposed from the outer surface of the first material layer.

8. The lithium battery structure as claimed in claim 6, wherein at least one of the plurality of particle structures of the particle structure group contacts the base material layer, and the plurality of particle structures of the particle structure group and the outer surface of the first material layer are separated from each other without contacting.

9. The lithium battery structure as claimed in claim 6, wherein the plurality of particle structures of the particle structure group and the base material layer are separated from each other without contact, and at least one of the plurality of particle structures of the particle structure group is contacted to the outer surface of the first material layer to be exposed from the outer surface of the first material layer.

10. The lithium battery structure as claimed in claim 6, wherein the plurality of particle structures of the particle structure group and the base material layer are separated from each other without contact, and the plurality of particle structures of the particle structure group and the outer surface of the first material layer are separated from each other without contact.

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