JP5223281B2 - リチウムイオン二次電池又はリチウム二次電池の正極用複合粒子、及びリチウムイオン二次電池又はリチウム二次電池 - Google Patents
リチウムイオン二次電池又はリチウム二次電池の正極用複合粒子、及びリチウムイオン二次電池又はリチウム二次電池 Download PDFInfo
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- JP5223281B2 JP5223281B2 JP2007255141A JP2007255141A JP5223281B2 JP 5223281 B2 JP5223281 B2 JP 5223281B2 JP 2007255141 A JP2007255141 A JP 2007255141A JP 2007255141 A JP2007255141 A JP 2007255141A JP 5223281 B2 JP5223281 B2 JP 5223281B2
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Images
Classifications
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- 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
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- 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
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- 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
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
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Description
もよい。
Li源としてLi2CO3、V源としてV2O5、及び、PO4源としてNH4H2PO4をLiVOPO4の化学量論比で混合し、600℃で12時間焼成して、母粒子4(平均粒径3.5μmのLiVOPO4粒子)を得た。
母粒子及び微粒子3の各粒径を表1に示す値としたこと以外は、実施例1と同様の方法で、実施例2〜7の各電極用複合粒子及び各評価用セルをそれぞれ作製し、また、放電電圧及び放電容量の測定を行った。その結果を表1に示す。
母粒子4として、3.5μmの粒径を有するLiNiMnCoO2粒子を用い、また、微粒子3の粒径を300nmとしたこと以外は、実施例1と同様の方法で、参考例8の電極用複合粒子及び評価用セルを作製し、また、放電電圧及び放電容量の測定を行った。その結果を表1に示す。
500nmの粒径を有する微粒子3を用いたこと以外は、実施例1と同様の方法で、比較例1の電極用複合粒子及び評価用セルを作製し、また、放電電圧及び放電容量の測定を行った。その結果を表1に示す。
比較例2では、実施例1〜7とは対照的に、電極用活物質として電極用複合粒子8を用いなかった。その代わりに、比較例2では、実施例1と同じ活物質(LiVOPO4)、導電性炭素、及びバインダーを共に混練・混合して得たスラリーを、アルミニウム箔上に塗布して電極を形成した。そして、電極の形成方法以外は実施例1と同様の方法で、比較例2の評価用セルを作製し、また、放電電圧及び放電容量の測定を行った。その結果を表1に示す。
比較例3では、参考例8とは対照的に、電極用活物質として電極用複合粒子8を用いなかった。その代わりに、比較例3では、参考例8と同じ活物質(LiNiMnCoO2)、導電性炭素、及びバインダーを共に混練、混合して得たスラリーを、アルミニウム箔上に塗布して電極を形成した。電極の形成方法以外は、参考例8と同様の方法で、比較例3の評価用セルを作製し、また、放電電圧及び放電容量の測定を行った。その結果を表1に示す。
Claims (2)
- 正極用活物質を含む母粒子を少なくとも1つ有する核粒子と、
前記核粒子の表面の少なくとも一部を被覆する電子伝導層と、を備え、
前記電子伝導層は、正極用活物質を含む微粒子と、炭素と、を有し、
前記微粒子の粒径が300nm以下であり、
前記母粒子に含まれる正極用活物質がLiVOPO4であり、
前記微粒子に含まれる正極用活物質がLiVOPO4である、
リチウムイオン二次電池又はリチウム二次電池の正極用複合粒子。 - 請求項1に記載の正極用複合粒子を含む正極を備える、リチウムイオン二次電池又はリチウム二次電池。
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US12/236,602 US8586182B2 (en) | 2007-09-28 | 2008-09-24 | Composite particle for electrode and electrochemical device |
EP08017010.3A EP2043183B1 (en) | 2007-09-28 | 2008-09-26 | Composite particle for electrode and electrochemical device |
CN2008101695445A CN101399336B (zh) | 2007-09-28 | 2008-09-28 | 电极用复合颗粒和电化学器件 |
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