Title:
METHOD FOR ANALYZING LITHIUM COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/157601
Kind Code:
A1
Abstract:
The present invention provides a method for analyzing a lithium composite oxide. A method for analyzing substitution positions of an Ni atom and an Mg atom in a compound that is represented by chemical formula Li(1 - x - y)Co(1 - a - b)Ni(x + a)Mg(y + b)O2, said method comprising: a first calculation step wherein the stabilization energy, which is obtained when an Ni atom and an Mg atom respectively substitute an arbitrary Li atom or Co atom in an LiCoO2 crystal, is calculated; a second calculation step wherein the stabilization energy of a compound that is represented by the chemical formula wherein the cation occupancy in the Li site is changed is calculated; and a first measurement step wherein the initial charge/discharge efficiency and the n-th charge/discharge efficiency of a compound that is represented by the chemical formula are measured. Incidentally, n represents an integer of 2 or more.
Inventors:
TAKAHASHI TATSUYOSHI (JP)
MIKAMI MAYUMI (JP)
MOMMA YOHEI (JP)
SAITO JO (JP)
MIKAMI MAYUMI (JP)
MOMMA YOHEI (JP)
SAITO JO (JP)
Application Number:
PCT/IB2020/050459
Publication Date:
August 06, 2020
Filing Date:
January 22, 2020
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M4/525
Domestic Patent References:
| WO2016088292A1 | 2016-06-09 |
Foreign References:
| JP2017162790A | 2017-09-14 | |||
| JP2013125594A | 2013-06-24 |
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