US 12,237,473 B2
Secondary battery
Takumi Hiasa, Kyoto (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Oct. 22, 2021, as Appl. No. 17/508,031.
Application 17/508,031 is a continuation of application No. PCT/JP2020/017576, filed on Apr. 23, 2020.
Claims priority of application No. 2019-082918 (JP), filed on Apr. 24, 2019.
Prior Publication US 2022/0045369 A1, Feb. 10, 2022
Int. Cl. H01M 10/38 (2006.01)
CPC H01M 10/38 (2013.01) [H01M 2300/0005 (2013.01); H01M 2300/0014 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a partition that separates a first space and a second space from each other and allows a metal ion to pass therethrough between the first space and the second space;
a negative electrode that is disposed in the first space and that the metal ion is to be inserted into and extracted from;
a positive electrode that is disposed in the second space and that the metal ion is to be inserted into and extracted from;
a first aqueous electrolytic solution that is contained in the first space and includes the metal ion to be inserted into and extracted from each of the negative electrode and the positive electrode; and
a second aqueous electrolytic solution that is contained in the second space and includes the metal ion to be inserted into and extracted from each of the negative electrode and the positive electrode,
wherein the second aqueous electrolytic solution has a pH lower than the first aqueous electrolytic solution, and
both of the first aqueous electrolytic solution and the second aqueous electrolytic solution comprise a saturated solution of a metal salt including the metal ion to be inserted into and extracted from each of the negative electrode and the positive electrode as a cation.