US 11,811,053 B2
Positive electrode and secondary battery
Takahito Nakayama, Osaka (JP); Tomoki Shiozaki, Osaka (JP); and Hideharu Takezawa, Nara (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/040,693
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 22, 2019, PCT No. PCT/JP2019/006865
§ 371(c)(1), (2) Date Sep. 23, 2020,
PCT Pub. No. WO2019/207934, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 2018-084399 (JP), filed on Apr. 25, 2018.
Prior Publication US 2021/0075002 A1, Mar. 11, 2021
Int. Cl. H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/66 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/131 (2013.01); H01M 4/66 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A positive electrode for use in a secondary battery, the positive electrode being to be wound in the secondary battery and comprising:
a positive electrode current collector;
a first intermediate layer disposed on a side that is to be an inner peripheral side when wound, among both sides of the positive electrode current collector;
a second intermediate layer disposed on another side that is to be an outer peripheral side when wound;
a positive electrode mixture layer disposed on the first intermediate layer, and another positive electrode mixture layer disposed on the second intermediate layer;
wherein the first intermediate layer and the second intermediate layer each include insulating particles and a conductive agent,
and a thickness of the first intermediate layer is smaller than a thickness of the second intermediate layer.