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:
Sep. 03, 2019
Filed:
Sep. 27, 2017
Applicant:
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Inventors:
Hirofumi Yasumiishi, Chiba, JP;
Ryuuta Yamaya, Chiba, JP;
Assignee:
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H01M 4/62 (2006.01); H01M 4/04 (2006.01); H01M 4/136 (2010.01); H01M 4/1397 (2010.01); H01M 4/36 (2006.01); H01M 4/66 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/5805 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/136 (2013.01); H01M 4/1397 (2013.01); H01M 4/366 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 4/5825 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract
A cathode material for a lithium-ion secondary battery which is made of agglomerated secondary particles formed by agglomeration of a plurality of primary particles of electrode active material particles made of a transition metal lithium phosphate compound having an olivine structure that is coated with a carbonaceous material, in which an arithmetic average roughness Ra of agglomerated secondary particle surfaces observed using a three-dimensional scanning electron microscope is 15 nm or more and 25 nm or less.