JP5318565B2 - 大容量不可逆物質を含有する新規なリチウムイオン電池システム - Google Patents
大容量不可逆物質を含有する新規なリチウムイオン電池システム Download PDFInfo
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- 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
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- 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
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Description
一般式I
LI2+xNI1−yMyO2+α
上記式中、−0.5<x<0.5、0<y<1、0<α<0.3、Mは、P、B、C、Al、Sc、Sr、TI、V、Zr、Mn、Fe、Co、Cu、Zn、Cr、Mg、Nb、Mo、及びCdからなる群より選ばれた1種以上の元素である。
[1]リチウムイオンを吸蔵、放出することができる正極と、
[2]リチウムイオンを吸蔵、放出することができる負極と、
[3]多孔性セパレータ、及び
[4]a)リチウム塩、b)電解液溶媒と、を含んでなる。
実施例1
正極活物質100重量部に対して、LI2NIO2 77重量部とMnO2 23重量部の混合物を正極活物質として用いた。上記正極活物質80重量%、導電剤としてのKS-6 10重量%、及び結合剤としてのPVdF10重量%を溶剤のNMPに添加して正極スラリーを調製した後、Al集電体上にコーティングして正極を作製した。
LI2NIO2:MoO3=77:23の重量比で混合してなるものを正極活物質として用い、カーボンを負極活物質として用いたことを除いては、実施例1と同法にてコイン形フル電池を作製し、該フル電池に対して1.5〜4.2Vの電圧範囲で充放電試験を実施し、その充放電プロパイルを図3に示した。
LICoO2 80%、KS-6(導電剤)10重量%、及びPVdF(結合剤)10重量%を溶剤であるNMPに添加して正極スラリーを調製した後、Al集電体上にコーティングして正極を作製し、LI金属を用いて負極を作製し、該両電極でコイン形半電池を作製した後、該半電池に対して1.5〜4.25Vの電圧範囲で充放電試験を実施した。該半電池の容量を図5に示した。
実施例1及び2から分かるように、本発明によれば、初回サイクルの充電時にリチウムイオンを過量放出することができる大容量不可逆物質であるLI2NIO2とリチウムを含有していない金属酸化物であるMnO2またはMoO3とを含む混合正極と、リチウム金属に代えてカーボンを含む負極を用いてコイン形フル電池を作製することができ、図2及び図4に示すように、MnO2+LI2NIO2(実施例1)、MoO3+LI2NIO2(実施例2)の混合正極の重量当たりの放電容量は、それぞれ292mAh/g、296mAh/gであって、本発明によるフル電池が、正極材料として既存から用いられていたリチウムコバルトオキシド、リチウムニッケルオキシド、またはリチウムマンガンオキシド(図5)を用いてなる電池に比べて優れた容量を示すことができる。
2:正極集電体
3:負極側のケース体
4:負極集電体
5:正極
6:負極
7:セパレータ
8:電解質
9:パッキング(または、ゲスケット)
Claims (8)
- 正極活物質と、負極活物質とを備えてなるリチウムイオン電池であって、
前記正極活物質が、リチウムを含有していない金属酸化物と、リチウムを含有した容量不可逆物質とを含んでなり、
前記リチウムを含有した容量不可逆物質が、下記一般式(I)で示される化合物であり、
Li2+xNi1−yMyO2+α (I)
〔上記式(I)中、
−0.5≦x≦0.5、
0≦y≦1、
0≦α≦0.3、
Mは、P、B、C、Al、Sc、Sr、Ti、V、Zr、Mn、Fe、Co、Cu、Zn、Cr、Mg、Nb、Mo、及びCdからなる群より選ばれた1種以上の元素である。〕
前記一般式(I)で示される化合物が、空間群Immmに属するものであり、
Ni、Mの複合酸化物が平面四配位(Ni、M)O4を形成し、平面四配位構造が向かい合う辺(O−Oで形成された辺)を共有し、直鎖を形成してなるものであり、
前記正極活物質100重量部に対して、前記容量不可逆物質40〜80重量部と、前記リチウムを含有していない金属酸化物20〜60重量部とを含んでなるものであり、
前記負極活物質がカーボンである、リチウムイオン電池。 - 前記容量不可逆物質が、初回サイクルの脱リチウム化時に不可逆的な相転移によって初期充電容量の50%以上100%未満で失われてなる、請求項1に記載のリチウムイオン電池。
- 前記リチウムを含有していない金属酸化物と、前記リチウムを含有した容量不可逆物質とが互いに混合されてなる、請求項1に記載のリチウムイオン電池。
- 前記リチウムを含有した容量不可逆物質が、
Li2+xNi1−yMyO2+α
〔上記式中、
−0.5≦x≦0.5、
0≦y≦1、
0≦α<0.3、
Mは、P、B、C、Al、Sc、Sr、Ti、V、Zr、Mn、Fe、Co、Cu、Zn、Cr、Mg、Nb、Mo、及びCdからなる群より選ばれた1種以上の元素である。〕、
LiMnO2、LiMxMn1−xO2
〔上記式中、
xは、0.05≦x<0.5であり、
Mは、Cr、Al、Ni、Mn、及びCoからなる群より選ばれる。〕、
LixVO3(1≦x≦6)、
Li3Fe2(PO4)3、
Li3Fe2(SO4)3、及び
Li3V(PO4)3からなる群より選ばれた1種以上の化合物である、請求項1に記載のリチウムイオン電池。 - 前記リチウムを含有していない金属酸化物が、充放電容量が70mAh/g〜500mAh/gの範囲である、請求項1に記載のリチウムイオン電池。
- 前記リチウムを含有していない金属酸化物が、MnO2、MoO3、VO2、V2O5、V6O13、Cr3O8、CrO2、Al2O3、ZrO2、AlPO4、SiO2、TiO2、MgOからなる群より選ばれた1種以上である、請求項1に記載のリチウムイオン電池。
- 前記正極活物質は、初回サイクルでの放電容量が150mAh/g以上である、請求項1に記載のリチウムイオン電池。
- 前記負極活物質が、リチウムを含有していないがリチウムイオンを吸蔵及び放出することができる物質を含んでなる、請求項1に記載のリチウムイオン電池。
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KR10-2005-0033466 | 2005-04-22 | ||
KR20050033466 | 2005-04-22 | ||
PCT/KR2006/001485 WO2006112674A1 (en) | 2005-04-22 | 2006-04-20 | New system of lithium ion battery containing material with high irreversible capacity |
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JP5318565B2 true JP5318565B2 (ja) | 2013-10-16 |
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US (1) | US8846250B2 (ja) |
EP (1) | EP1880436B1 (ja) |
JP (1) | JP5318565B2 (ja) |
KR (1) | KR20060111393A (ja) |
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CN114766067A (zh) * | 2021-10-25 | 2022-07-19 | 宁德新能源科技有限公司 | 正极极片、电化学装置及电子装置 |
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JP2002237293A (ja) | 2000-07-06 | 2002-08-23 | Japan Storage Battery Co Ltd | 非水電解質二次電池およびその製造方法 |
US6821677B2 (en) * | 2001-03-29 | 2004-11-23 | Kabushiki Kaisha Toshiba | Negative electrode active material and nonaqueous electrolyte battery |
JP3723146B2 (ja) * | 2001-03-29 | 2005-12-07 | 株式会社東芝 | 非水電解質電池 |
EP1391950B1 (en) * | 2001-04-20 | 2010-08-25 | GS Yuasa Corporation | Anode active matter and production method therefor, non- aqueous electrolyte secondary battery-use anode, and non-aqueous electrolyte secondary battery |
US6964828B2 (en) | 2001-04-27 | 2005-11-15 | 3M Innovative Properties Company | Cathode compositions for lithium-ion batteries |
US20040185346A1 (en) | 2003-03-19 | 2004-09-23 | Takeuchi Esther S. | Electrode having metal vanadium oxide nanoparticles for alkali metal-containing electrochemical cells |
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WO2005031892A2 (en) * | 2003-09-26 | 2005-04-07 | Lg Chem, Ltd. | Method for regulating terminal voltage of cathode during overdischarge and cathode active material for lithium secondary battery |
KR100595362B1 (ko) * | 2004-07-21 | 2006-06-30 | 제일모직주식회사 | 비수계 전해질 2차 전지 양극 활물질용 리튬-니켈 복합산화물, 그 제조방법 및 그를 포함하는 양극 활물질 |
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WO2021054620A1 (ko) * | 2019-09-20 | 2021-03-25 | 주식회사 엘지화학 | 이차전지용 양극재에 포함되는 비가역 첨가제, 이를 포함하는 양극재, 및 양극재를 포함하는 이차전지 |
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EP1880436B1 (en) | 2017-07-19 |
TW200705737A (en) | 2007-02-01 |
KR20060111393A (ko) | 2006-10-27 |
CN101164186A (zh) | 2008-04-16 |
US20060257737A1 (en) | 2006-11-16 |
CN101164186B (zh) | 2010-05-26 |
EP1880436A1 (en) | 2008-01-23 |
US8846250B2 (en) | 2014-09-30 |
EP1880436A4 (en) | 2008-11-19 |
TWI362136B (en) | 2012-04-11 |
JP2008547156A (ja) | 2008-12-25 |
WO2006112674A1 (en) | 2006-10-26 |
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