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:
Feb. 28, 2023
Filed:
Nov. 19, 2018
Vehicle Energy Japan Inc., Hitachinaka, JP;
Yuki Takei, Hitachinaka, JP;
Shuichi Suzuki, Hitachinaka, JP;
Takeshi Miki, Hitachinaka, JP;
Hironori Sasaki, Hitachinaka, JP;
VEHICLE ENERGY JAPAN INC., Hitachinaka, JP;
Abstract
Provided is a positive electrode for lithium ion secondary cell that includes an electrolyte holding layer excellent in electron conductivity, and a lithium ion secondary cell using the same. The present invention relates to a positive electrode for lithium ion secondary cell that includes a positive electrode current collector foil and positive electrode mixture layers laminated on both surfaces of the positive electrode current collector foil. The positive electrode mixture layer includes a first positive electrode active material layer, an electrolyte holding layer, and a second positive electrode active material layer. The first positive electrode active material layer, the electrolyte holding layer, and the second positive electrode active material layer contain positive electrode active materials, binders, and conductive agents containing carbonaceous material. A conductive agent ratio of the electrolyte holding layer is higher than conductive agent ratios of the first positive electrode active material layer and the second positive electrode active material layer. A positive electrode active material ratio and a binder ratio of the electrolyte holding layer are lower than positive electrode active material ratios and binder ratios of the first positive electrode active material layer and the second positive electrode active material layer.