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:
Aug. 03, 2021
Filed:
Dec. 22, 2017
Waseda University, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Suguru Noda, Tokyo, JP;
WASEDA UNIVERSITY, Tokyo, JP;
ZEON CORPORATION, Tokyo, JP;
Abstract
A secondary battery includes an electrode structure, the electrode structure includes a positive electrode changing in volume by expansion or contraction during discharging or charging, and a negative electrode changing in volume in a reverse way to the positive. The positive electrode and the negative electrode have a volume ratio of 1.1 or more, the volume ratio being a value obtained by dividing the volume under expansion by the volume under contraction, and the positive electrode or the negative electrode has the volume ratio of 1.9 or more, and has a total volume ratio of 1.2 or less, the total value ratio being a value obtained by dividing a larger value by a smaller value with respect to a total volume of the positive electrode and the negative electrode in a discharged state and a total volume of the positive electrode and the negative electrode in a charged state.