CN113264561B - A kind of water washing method of lithium ion positive electrode material - Google Patents
A kind of water washing method of lithium ion positive electrode material Download PDFInfo
- Publication number
- CN113264561B CN113264561B CN202110611591.6A CN202110611591A CN113264561B CN 113264561 B CN113264561 B CN 113264561B CN 202110611591 A CN202110611591 A CN 202110611591A CN 113264561 B CN113264561 B CN 113264561B
- Authority
- CN
- China
- Prior art keywords
- washing
- lithium ion
- water
- positive electrode
- electrode material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005406 washing Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007774 positive electrode material Substances 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims abstract description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 32
- UAZDIGCOBKKMPU-UHFFFAOYSA-O azanium;azide Chemical compound [NH4+].[N-]=[N+]=[N-] UAZDIGCOBKKMPU-UHFFFAOYSA-O 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 239000010405 anode material Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 238000001694 spray drying Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 6
- 150000001340 alkali metals Chemical class 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 6
- 239000010406 cathode material Substances 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
- C01G53/44—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a water washing method of a lithium ion anode material, which is characterized in that liquid nitrogen and ammonia azide are added into a water washing system when the lithium ion anode material is washed. The method has good cleaning effect on the residual alkali metal of the lithium ion anode material, has small structural damage to the material, and has small influence on the capacity, the cycle performance and the safety performance of the material.
Description
Technical Field
The invention belongs to the field of lithium ion anode materials, and relates to a water washing method of a lithium ion anode material.
Background
The water washing process is a key process of the lithium ion battery anode material, in particular to a ternary high nickel anode material. In the anode material washing process in the industry at present, deionized water is mainly adopted to directly carry out stirring, centrifuging, drying and other processes on the material at different times so as to remove residual alkali metals (lithium carbonate and lithium hydroxide) on the surface of the material, thereby improving the capacity, circulation and safety performance of the material.
However, when the deionized water is used for cleaning the cathode material, the main crystal structure of the cathode material is often damaged, so that the theoretical capacity and the cycle performance are reduced, and the deionized water is poor in removing effect of lithium carbonate and easy to remain, so that the safety performance and the cycle performance of the material are affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a water washing method of a lithium ion cathode material, which has good washing effect on residual alkali metal, small structural damage to the material and small influence on capacity, cycle performance and safety performance.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for washing a lithium ion anode material comprises the step of adding liquid nitrogen and ammonium azide into a washing system when the lithium ion anode material is washed.
The above-mentioned method for washing a lithium ion positive electrode material with water preferably comprises the steps of:
s1, adding ammonium azide into deionized water, and adding liquid nitrogen to keep the temperature of the deionized water at 0-20 ℃;
s2, adding a lithium ion positive electrode material, stirring, washing, and continuously adding liquid nitrogen during the washing period to ensure that the temperature of the water-washed slurry is 0-20 ℃;
and S3, removing residual water in the water-washing slurry treated in the step S2, and drying to obtain the product.
In the above method for washing the lithium ion cathode material with water, preferably, the amount of the ammonium azide is 0.05wt% to 1.00 wt% of the weight of the lithium ion cathode material.
In the above method for washing the lithium ion cathode material, preferably, the amount of the deionized water is 30-110 wt% of the lithium ion cathode material.
In the above method for washing a lithium ion positive electrode material, in step S2, the stirring time is preferably 0 to 60 min.
The method for washing the lithium ion cathode material is characterized in that in step S3, the drying is double-cone drying or roller kiln drying spray drying; the drying temperature is 80-250 ℃.
In the above-described method for washing the lithium ion positive electrode material with water, it is preferable that in step S3, spray drying, filter-press filtration or centrifugal filtration is used to remove residual water.
Compared with the prior art, the invention has the advantages that:
through a great deal of research and development, in the process of washing the residual alkali metal on the surface of the lithium ion battery material, the method improves the content of the residual Li by adding liquid nitrogen and ammonium azide into water2CO3The cleaning effect and efficiency can be realized, and simultaneously the material structure can be protected, and Li in the material can be prevented+Persistent withdrawal. Through analysis, the liquid nitrogen maintains the proper temperature of the solution in the water washing process, and accelerates Li on the surface of the matrix material2CO3The dissolution of (2) improves the washing efficiency, and then improves the washing and reduces the effect of the remaining Li of the lithium carbonate on the surface of the material, and the ammonium azide forms a protective layer on the surface of the material, thereby preventing the sustainable damage of the water washing process water to the material, and balancing the solution Li of the water washing process+Concentration as a buffer to inhibit Li in the material+The continuous separation is carried out to achieve the aim of the matrix material, and the liquid nitrogen can improve the solubility of the ammonium azide in the water washing solution while maintaining the low temperature, thereby further inhibiting Li in the water washing process+Can be continuously released. Therefore, the amount of Li remaining in the reaction solution is increased2CO3The cleaning effect and efficiency can be realized, and simultaneously the material structure can be protected, and Li in the material can be prevented+Is removed.
Drawings
Fig. 1 is a graph comparing cycle performance of lithium ion batteries manufactured from the positive electrode materials after being washed with water by the water washing method of examples 1 to 3 and the conventional water washing method.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
The invention discloses a lithium ion positive electrode material, which is characterized in that a main crystal structure of the positive electrode material is easy to damage when residual alkali metal on the surface of the positive electrode material is cleaned by using the conventional water washing agent and the conventional water washing method, and the removal effect is poor and the residual alkali metal is easy to cause, so that the theoretical capacity is reduced, the safety performance and the cycle performance of the material are influenced, and the like.
The materials and equipment used in the following examples are commercially available.
Example 1:
a water washing method of a lithium ion cathode material comprises the following steps:
(1) introducing the deionized water into a beaker, wherein the weight of the deionized water is 80wt% of that of water washing materials, and the water washing materials are high-nickel NCM (811) polycrystalline materials;
(2) adding a proper amount of liquid nitrogen, and ensuring the temperature of the deionized water in the step (1) to be 5 ℃;
(3) adding ammonium azide, wherein the weight of the ammonium azide is 0.05wt% of that of the water washing material;
(4) slowly adding the water-washed material at a constant speed within 2 minutes, stirring for 10 minutes, continuously adding liquid nitrogen during the stirring, ensuring the temperature of the water-washed slurry to be 5 ℃, and obtaining the water-washed material;
(5) filter pressing and filtering to remove residual water;
(6) and (3) drying: drying by adopting a double cone at the drying temperature of 200 ℃.
XRD detection is carried out on the lithium ion battery anode material after washing, and the crystal form is not changed, which indicates that the main structure of the material after washing is not changed.
Example 2:
a water washing method of a lithium ion cathode material comprises the following steps:
(1) introducing the deionized water into a beaker, wherein the weight of the deionized water is 80wt% of that of water washing materials, and the water washing materials are high-nickel NCM (811) polycrystalline materials;
(2) adding a proper amount of liquid nitrogen, and ensuring the temperature of the deionized water in the step (1) to be 15 ℃;
(3) adding ammonium azide, wherein the weight of the ammonium azide is 0.20wt% of that of the water washing material;
(4) slowly adding the water-washed material at a constant speed within 2 minutes, stirring for 10 minutes, continuously adding liquid nitrogen during the stirring, ensuring the temperature of the water-washed slurry to be 15 ℃, and obtaining the water-washed material;
(5) removing residual water; one of spray drying, filter pressing filtration and centrifugal filtration can be selected;
(6) drying at 200 deg.C; one of bipyramid drying and roller kiln drying and spray drying can be selected.
XRD detection is carried out on the lithium ion battery anode material after washing, and the crystal form is not changed, which indicates that the main structure of the material after washing is not changed.
Example 3:
a water washing method of a lithium ion cathode material comprises the following steps:
(1) introducing the deionized water into a beaker, wherein the weight of the deionized water is 80wt% of that of water washing materials, and the water washing materials are high-nickel NCM (811) polycrystalline materials;
(2) adding a proper amount of liquid nitrogen, and ensuring the temperature of the deionized water in the step (1) to be 5 ℃;
(3) adding ammonium azide, wherein the weight of the ammonium azide is 0.60wt% of that of the water washing material;
(4) slowly adding the water-washed material at a constant speed within 2 minutes, stirring for 10 minutes, continuously adding liquid nitrogen during the stirring, ensuring the temperature of the water-washed slurry to be 5 ℃, and obtaining the water-washed material;
(5) removing residual water; one of spray drying, filter pressing filtration and centrifugal filtration can be selected;
(6) drying at 200 deg.C; one of bipyramid drying and roller kiln drying and spray drying can be selected.
XRD detection is carried out on the lithium ion battery anode material after washing, and the crystal form is not changed, which indicates that the main structure of the material after washing is not changed.
The surface residual Li of the positive electrode material cleaned by the above-mentioned each example and the conventional cleaning method is carried out2CO3And Li/Me (i.e., the molar ratio of Li to other metals in the positive electrode material after water washing) testThe results are shown in Table 1.
The positive electrode material cleaned by the above-mentioned embodiments and the conventional cleaning method is matched with metal Li to manufacture a half cell, wherein the positive electrode slurry for preparing the positive electrode plate comprises the positive electrode material, the conductive agent and the binder (mass ratio is 92:4: 4) after water washing. And (3) carrying out charge and discharge tests on the prepared battery, wherein the test conditions are as follows: the charging and discharging voltage range is 2.8-4.25V, the capacity test is 0.1C, the cycle test is 1C, and the accuracy of data is reduced when the cycle performance test of the half-cell exceeds 50 weeks, so the cycle number is 50 weeks. The electrochemical properties of the test are shown in table 1, and the cycle performance chart is shown in fig. 1.
TABLE 1
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.
Claims (5)
1. A method for washing a lithium ion anode material is characterized in that liquid nitrogen and ammonium azide are added into a washing system in the process of washing the lithium ion anode material, and the method specifically comprises the following steps:
s1, adding ammonium azide into deionized water, and adding liquid nitrogen to keep the temperature of the deionized water at 0-20 ℃; the dosage of the ammonium azide is 0.05 to 1.00 weight percent of the weight of the water washing material;
s2, adding a lithium ion positive electrode material, stirring, washing, and continuously adding liquid nitrogen during the washing period to ensure that the temperature of the water-washed slurry is 0-20 ℃;
and S3, removing residual water in the water-washing slurry treated in the step S2, and drying to obtain the product.
2. The method for washing a lithium ion positive electrode material according to claim 1, wherein the amount of the deionized water is 30 to 110wt% of the lithium ion positive electrode material.
3. The method for washing a lithium ion positive electrode material according to claim 1 or 2, wherein the stirring time in step S2 is 0 to 60 min.
4. The method for washing a lithium ion positive electrode material according to claim 1 or 2, wherein the drying is double cone drying or roller kiln drying spray drying in step S3; the drying temperature is 80-250 ℃.
5. The method for washing a lithium ion positive electrode material according to claim 1 or 2, wherein in step S3, residual water in the washing slurry is removed by spray drying, filter-press filtration, or centrifugal filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611591.6A CN113264561B (en) | 2021-06-02 | 2021-06-02 | A kind of water washing method of lithium ion positive electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611591.6A CN113264561B (en) | 2021-06-02 | 2021-06-02 | A kind of water washing method of lithium ion positive electrode material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113264561A CN113264561A (en) | 2021-08-17 |
| CN113264561B true CN113264561B (en) | 2021-09-28 |
Family
ID=77233855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110611591.6A Active CN113264561B (en) | 2021-06-02 | 2021-06-02 | A kind of water washing method of lithium ion positive electrode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113264561B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115849467B (en) * | 2023-02-28 | 2023-06-02 | 宜宾锂宝新材料有限公司 | Method for removing residual alkali by high-nickel material, ternary material and its preparation method and application |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6852446B2 (en) * | 2001-11-09 | 2005-02-08 | Yardney Technical Products, Inc. | Non-aqueous electrolytes for lithium electrochemical cells |
| CN103061106B (en) * | 2012-12-31 | 2015-12-02 | 东华大学 | A kind of low-carbon (LC) photocuring one-way wet-guide finishing agent and its preparation method and application |
| CN104927043B (en) * | 2015-06-11 | 2018-05-15 | 中国科学院山西煤炭化学研究所 | A kind of 1,2,3- triazoles salt polymer and preparation method and application |
| CN106268740B (en) * | 2016-08-23 | 2019-04-30 | 昆明新光能源环保科技有限公司 | A kind of loaded catalyst and its preparation method and application for low concentration combustible component anoxycausis in liquid nitrogen washing tail-gas |
| CN106252780A (en) * | 2016-11-03 | 2016-12-21 | 王坚 | A kind of lithium-ion-power cell disassembles the processing method producing waste water |
| CN106957065B (en) * | 2017-04-19 | 2018-07-31 | 中国工程物理研究院化工材料研究所 | A kind of supper-fast preparation method of N, Ti3+ codope porous TiO2 nanometer sheet |
| CN110943249B (en) * | 2018-09-25 | 2021-06-18 | 深圳市比亚迪锂电池有限公司 | Polymer electrolyte and lithium ion battery |
| CN110649248A (en) * | 2019-10-09 | 2020-01-03 | 江西星盈科技有限公司 | Surface modification method of anode material and anode material prepared by adopting same |
| CN112614995A (en) * | 2020-12-16 | 2021-04-06 | 路小红 | FeS nanoflower in-situ doped porous carbon nanofiber negative electrode material and preparation method thereof |
-
2021
- 2021-06-02 CN CN202110611591.6A patent/CN113264561B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113264561A (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110676533B (en) | Method for treating positive electrode material of lithium ion battery | |
| US10189083B2 (en) | Method for recycling electrode materials of lithium ion batteries | |
| CN101154757A (en) | Process for recovering carbon materials of battery cathode | |
| CN111430831B (en) | Method for recovering waste lithium ion battery negative electrode material | |
| CN101212074B (en) | Method for recovering positive pole material of Li-ion battery | |
| CN105576314A (en) | Recycling method of positive electrode piece of lithium ion battery | |
| CN112795940B (en) | Method for inhibiting coexistence cation interference by electrochemical lithium extraction of brine | |
| CN111224187A (en) | A method for directly repairing and regenerating the cathode material of waste lithium iron phosphate battery | |
| CN111285366A (en) | Regeneration method of lithium ion battery negative electrode graphite | |
| CN113264561B (en) | A kind of water washing method of lithium ion positive electrode material | |
| CN114204151A (en) | A method for repairing and modifying cathode active materials of waste lithium ion batteries | |
| CN116364909A (en) | A kind of regenerative restoration method of spent lithium cobalt oxide cathode material | |
| CN114890414B (en) | Method for recycling graphite material in waste batteries | |
| CN108598465A (en) | A method of it extracting lithium from salt lake bittern and prepares anode material of lithium battery | |
| WO2022156499A1 (en) | Electrolytic solution for lithium-sulfur battery, and preparation method therefor and application thereof | |
| CN102610813A (en) | Method for removing impurities from lithium iron phosphate (LiFePO4) and LiFePO4 battery | |
| CN113522868A (en) | Washing method for removing residual alkali on surface of positive electrode material | |
| CN116404293B (en) | Waste lithium battery graphite negative electrode recycling method based on oil sludge microwave pyrolysis cladding | |
| CN117256066A (en) | Method for regenerating full-chain integrated waste lithium iron phosphate positive plate and regenerated lithium iron phosphate positive plate | |
| CN1332475C (en) | Production of LixCoO2 from recovering waste lithium ionic battery | |
| CN112670603A (en) | Method for repairing regenerated failed ternary material by physical method multi-medium cooperation | |
| CN114804049B (en) | Method for recovering high-purity ferric phosphate from lithium iron phosphate waste batteries | |
| CN116902953A (en) | A method for repairing and regenerating waste lithium iron phosphate battery cathode materials | |
| CN116111224A (en) | Recycling method of waste lithium iron phosphate battery positive electrode material, lithium iron phosphate positive electrode material and application thereof | |
| CN116315223A (en) | Graphite recovery and regeneration method for recovering carbon slag from waste lithium ion batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 61 Yan Gao Road, Yuelu District, Changsha City, Hunan Province 410221 Patentee after: Minmetals New Energy Materials (Hunan) Co.,Ltd. Country or region after: China Patentee after: JINCHI ENERGY MATERIAL Co.,Ltd. Address before: No. 61 Yan Gao Road, Yuelu District, Changsha City, Hunan Province Patentee before: Hunan Changyuan Lithium Co.,Ltd. Country or region before: China Patentee before: JINCHI ENERGY MATERIAL Co.,Ltd. |