US 12,406,988 B2
Non-aqueous electrolyte secondary battery
Takuya Sadakane, Osaka Fu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/773,407
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Sep. 17, 2020, PCT No. PCT/JP2020/035246
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/084958, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-199422 (JP), filed on Oct. 31, 2019.
Prior Publication US 2022/0407060 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/62 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein
lithium metal deposits on the negative electrode during charging, and the lithium metal dissolves in the nonaqueous electrolyte from the negative electrode during discharging,
the positive electrode includes a positive electrode mixture comprising a positive electrode active material and an additive,
the positive electrode active material comprises a composite oxide comprising lithium and a transition metal,
the additive comprises a particulate base material, and an organic compound group fixed to a surface of the base material by a covalent bond,
the covalent bond comprises a X—O-A bond,
the element X is bonded to the organic compound group, and is at least one selected from the group consisting of Si and Ti,
the element A is an element constituting the base material, and
the organic compound group has 2 or more carbon atoms.