The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2021
Filed:
Mar. 15, 2019
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Abstract
An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material represented by LiFeMnMgAPOand a carbonaceous film coating a surface of the electrode active material, a particle diameter D10 of secondary particles is 0.5 μm or more, a particle diameter D90 of the secondary particles is 25 μm or less, and a ratio (O/I) of an average value of thicknesses I of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 μm or less from a center of the secondary particle at 300 measurement points to an average value of thicknesses O of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 μm or less from an outermost surface of the secondary particle at 300 measurement points is 0.85 or more and less than 1.00.