US 12,463,253 B2
Nonaqueous electrolyte solution secondary battery
Ryo Harada, Kyoto (JP)
Assigned to GS Yuasa International Ltd., Kyoto (JP)
Appl. No. 17/290,139
Filed by GS Yuasa International Ltd., Kyoto (JP)
PCT Filed Oct. 31, 2019, PCT No. PCT/JP2019/042847
§ 371(c)(1), (2) Date Apr. 29, 2021,
PCT Pub. No. WO2020/090986, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-206408 (JP), filed on Nov. 1, 2018; and application No. 2019-044950 (JP), filed on Mar. 12, 2019.
Prior Publication US 2021/0328267 A1, Oct. 21, 2021
Int. Cl. H01M 10/0569 (2010.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 4/133 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0034 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A nonaqueous electrolyte solution secondary battery comprising:
a positive electrode; and
a nonaqueous electrolyte solution, wherein
the positive electrode contains a sulfur-mesoporous carbon composite that is a composite of a sulfur-based active material and mesoporous carbon,
the mesoporous carbon is a porous carbon having a mesoporous volume larger than a microporous volume, the mesoporous volume being a pore volume derived from pores having a diameter of 2 nm or more and 50 nm or less, the microporous volume being a pore volume derived from pores having a diameter of less than 2 nm,
a BET specific surface area of the mesoporous carbon is 1500 m2g−1 or more and 4000 m2g−1 or less,
the nonaqueous electrolyte solution contains a fluorinated solvent, and
the fluorinated solvent contains a chain fluorinated carbonate, a chain fluorinated carboxylic acid ester, or a combination thereof.