Invention Grant
- Patent Title: Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery
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Application No.: US15518471Application Date: 2015-10-13
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Publication No.: US10535875B2Publication Date: 2020-01-14
- Inventor: Kenji Takamori , Hiroyuki Kurita , Yuichiro Imanari , Daisuke Yamashita , Kimiyasu Nakao , Kyousuke Doumae
- Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED , TANAKA CHEMICAL CORPORATION
- Applicant Address: JP Tokyo JP Fukui-Shi, Fukui
- Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED,TANAKA CHEMICAL CORPORATION
- Current Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED,TANAKA CHEMICAL CORPORATION
- Current Assignee Address: JP Tokyo JP Fukui-Shi, Fukui
- Agency: Foley & Lardner LLP
- Priority: JP2014-210577 20141015
- International Application: PCT/JP2015/078879 WO 20151013
- International Announcement: WO2016/060105 WO 20160421
- Main IPC: H01M4/525
- IPC: H01M4/525 ; H01M4/505 ; H01M10/0525 ; C01G53/00 ; H01M4/02
Abstract:
A positive electrode active material, which has a crystallite size α/crystallite size β ratio (α/β) of 1 to 1.75 or less, wherein the crystallite size α is within a peak region of 2θ=18.7±1° and the crystallite size β is within a peak region of 2θ=44.6±1°, each determined by a powder X-ray diffraction measurement using Cu-Kα ray, and has a composition represented by formula (I) below: Li[Lix(NiaCobMncMd)1-x]O2 (I) wherein 0≤x≤0.2, 0.3
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