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:
May. 01, 2018
Filed:
Mar. 27, 2017
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Hirofumi Yasumiishi, Tokyo, JP;
Ryuuta Yamaya, Tokyo, JP;
Abstract
An electrode material for a lithium-ion secondary battery of the present invention is secondary particles including inorganic particles represented by General Formula LiFeMnMPOand a carbonaceous film coating surfaces of the inorganic particles, in which an amount of carbon is 0.5% by mass to 2.5% by mass, a specific surface area is 10 m/g to 20 m/g, a first particle diameter (D90(a)) at which a cumulative volume percentage of a particle size distribution of secondary particles is 90% before an ultrasonic treatment is 20 mm to 40 mm, a second particle diameter (D90(b)) at which the cumulative volume percentage of the particle size distribution of the secondary particles is 90% after the ultrasonic treatment is 10 mm to 15 mm, and a ratio (D90(b)/D90(a)) of the second particle diameter (D90(b)) to the first particle diameter (D90(a)) is 0.3 to 0.5.