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Title:
リチウムイオン二次電池用正極活物質
Document Type and Number:
Japanese Patent JP5741908
Kind Code:
B2
Abstract:
The positive electrode active material includes a compound represented by the following composition formula: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Li 1.5 ][Li 0.5(1-x) Mn 1-x M 1.5x ]O 3 (wherein x satisfies 0.1 ‰¤ x ‰¤ 0.5, and M is represented by Ni ± Co ² Mn ³ in which ±, ² and ³ satisfy 0 <± ‰¤ 0.5, 0 ‰¤ ² ‰¤ 0.33 and 0 <³ ‰¤ 0.5, respectively), wherein a half width of the peak of a (001) crystal plane of the compound measured by X-ray diffraction is in a range from 0.14 to 0.33 inclusive, and an average primary particle diameter of the compound is in a range from 0.03 µm to 0.4 µm inclusive.

Inventors:
Atsushi Ito
Oshihara Kenzo
Yasuhiko Osawa
Application Number:
JP2011051227A
Publication Date:
July 01, 2015
Filing Date:
March 09, 2011
Export Citation:
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Assignee:
Nissan Motor Co., Ltd
International Classes:
H01M4/525; H01M4/505
Domestic Patent References:
JP2008270201A
Other References:
伊藤淳史,宋東,渡邊学,宮本隆司,大澤康彦,秦野正治,堀江英明,"高容量リチウムイオン電池用正極材料Li2MnO3-LiMO2の組成と電池特性",電気化学会第77会大会 講演予稿集,2010年,1B22
井上大誠,田邊浩嵩,中村博吉,野口英行,"xLi2MnO3-(1-x)LiMO2高容量正極材料の電気化学特性",電気化学会第77会大会 講演予稿集,2010年,1B25
吉井一洋,藪内直明,阿部善也,中井泉,駒場慎一,"高容量Li2MnO3-Li(Co1/3Ni1/3Mn1/3)O2系正極材料に関する研究I.Li脱挿入時の結晶構造と電子状態の変化",第50回電池討論会 講演予稿集,2009年,1B16
藪内直明,吉井一洋,駒場慎一,明承澤,"高容量Li2MnO3-Li(Co1/3Ni1/3Mn1/3)O2系正極材料に関する研究II.正極と電解液界面における酸化還元反応",第50回電池討論会 講演予稿集,2009年,1B17
Attorney, Agent or Firm:
Janggi Motonori