US 11,894,561 B2
Secondary battery
Hirotetsu Suzuki, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Apr. 29, 2020, as Appl. No. 16/862,528.
Claims priority of application No. 2019-101774 (JP), filed on May 30, 2019.
Prior Publication US 2020/0381737 A1, Dec. 3, 2020
Int. Cl. H01M 4/485 (2010.01); H01M 4/66 (2006.01); H01M 10/0569 (2010.01)
CPC H01M 4/666 (2013.01) [H01M 4/485 (2013.01); H01M 4/661 (2013.01); H01M 4/667 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0034 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A secondary battery, comprising:
a cathode comprising a cathode current collector and a cathode mixture layer containing a cathode active material;
an anode comprising an anode current collector and coating layer; and
a non-aqueous electrolyte containing a non-aqueous solvent and a lithium salt which has been dissolved in the non-aqueous solvent,
wherein:
a surface of the anode current collector is coated with the coating layer,
the coating layer consists of an alkaline earth metal fluoride,
the cathode active material includes a lithium composite oxide having a crystal structure which belongs to a space group R-3m or C2/m, and the lithium composite oxide contains Ni and Co,
the anode current collector is made of a metal material, the metal material including copper or an alloy thereof,
the coating layer is directly disposed on the surface of the anode current collector,
during charge, a lithium metal represented by the formula Li is deposited on the anode, and
during discharge, the lithium metal represented by the formula Li is dissolved in the non-aqueous electrolyte.