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:
Oct. 29, 2019
Filed:
Dec. 08, 2014
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Wataru Ogihara, Kanagawa, JP;
Hideaki Tanaka, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A method for producing a lithium ion secondary battery comprising the positive electrode active material of formula (1), LiMnMO(x satisfies 0<x<1) . . . (1) (M in the formula is a lithium-containing transition metal oxide expressed by NiCoMnM1(in which 0<a≤0.5, 0≤b≤0.33, 0<c≤0.5, and 0≤d≤0.1 are satisfied, the sum of a, b, c, and d becomes 1, and M1 in the formula is an element selected from Li, V, Al, Zr, Ti, Nb, Fe, Cu, Cr, Mg, and Zn)). The method comprises a step to repeat charge-discharge multiple times (charge-discharge interval), and comprises a step to discharge a at a lower current density than the current density during charge a, during the discharge of the multiple charges-discharges, or, a step to discharge b at a lower current density than the current density during charge a after the electromotive force is naturally recovered by idle b after each charge-discharge.