JP2015095339A - 蓄電装置用電極に添加される添加剤粒子 - Google Patents
蓄電装置用電極に添加される添加剤粒子 Download PDFInfo
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- additive
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- 238000003860 storage Methods 0.000 title claims abstract description 45
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- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 30
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002344 surface layer Substances 0.000 claims abstract description 21
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 15
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- 239000000203 mixture Substances 0.000 description 41
- 239000007774 positive electrode material Substances 0.000 description 33
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- 239000002482 conductive additive Substances 0.000 description 7
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- 229910013553 LiNO Inorganic materials 0.000 description 1
- 229910002991 LiNi0.5Co0.2Mn0.3O2 Inorganic materials 0.000 description 1
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- OEMGCAOEZNBNAE-UHFFFAOYSA-N [P].[Li] Chemical class [P].[Li] OEMGCAOEZNBNAE-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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
- Y02E60/13—Energy storage using capacitors
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
リチウムイオン二次電池は、正極と負極と電解質とを有する。本発明の電極は、リチウムイオン二次電池の正極及び負極のいずれでもよいが、リチウムイオン二次電池の正極に用いられることがよい。
リチウムイオンキャパシタは、正極と負極と電解質とを有する。本発明の電極は、リチウムイオンキャパシタの正極及び負極のいずれでもよいが、リチウムイオンキャパシタの正極に用いられることがよい。
水溶性リチウム化合物としてのLiOHを含む水溶液と、マグネシウム塩としてのMg(NO3)2を含む水溶液と、リン酸塩としてのリン酸水素アンモニウム(NH3)2HPO4を含む水溶液とを混合して、混合水溶液を調製した。混合水溶液の中のLiOHとMg(NO3)2とリン酸水素アンモニウムとのモル濃度の比率は、1:1:1とした。混合水溶液の中のLiとMgとリンとのモル濃度の比率は、1:1:1とした。混合水溶液の混合時の条件は、室温、混合時間:60分とした。混合後には、濾過フィルターを用いて濾過処理を行い、固形物を液体から分離した。固形物を120℃で乾燥させた。十分に乾燥させた固形物を300〜700℃で数時間焼成した。これにより、添加剤Aを得た。
LiOHを用いない点を除いて、添加剤Aの製造方法と同様に添加剤を調製した。即ち、マグネシウム塩としてのMg(NO3)2を含む水溶液と、リン酸塩としてのリン酸水素アンモニウム(NH3)2HPO4を含む水溶液とを混合して、混合水溶液を調製した。混合水溶液の中のMg(NO3)2とリン酸水素アンモニウムとのモル比率は、3:2とした。混合後には、添加剤Aと同様に濾過処理及び乾燥して添加剤を得た。得られた添加剤は添加剤Bと称する。
比較例2では、添加剤を添加することなく正極を作製した。その他は、実施例1と同様である。
実施例1及び比較例1、2の正極を用いてリチウムイオン二次電池を作製した。負極は、カーボンからなる負極活物質をもつ負極合材と、集電体としての銅箔とを備えている。
Claims (6)
- 蓄電装置用電極に添加される添加剤粒子であって、
前記添加剤粒子は、マグネシウムとリチウムとを含むリン酸塩からなり、
前記添加剤粒子は、前記添加剤粒子の表面近傍の表層と、前記表層よりも内側の内部とからなり、前記表層のマグネシウムのモル濃度は、前記内部のマグネシウムのモル濃度よりも高いことを特徴とする添加剤粒子。 - 前記添加剤粒子の前記表層でのリンのモル濃度に対するマグネシウムのモル濃度の比率は、前記添加剤粒子の前記内部でのリンのモル濃度に対するマグネシウムのモル濃度の比率よりも高い請求項1記載の添加剤粒子。
- 前記添加剤粒子の平均粒径は、10μm以上50μm以下である請求項1又は2に記載の添加剤粒子。
- 請求項1〜3のいずれか1項に記載の添加剤粒子を含有していることを特徴とする蓄電装置用電極。
- 前記蓄電装置用電極は正極である請求項4に記載の蓄電装置用電極。
- 請求項4または請求項5に記載の蓄電装置用電極と、他方の電極と、電解液とを有することを特徴とする蓄電装置。
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