US 12,148,885 B2
Non-aqueous electrolyte secondary battery and electrolytic solution used therefor
Tasuku Ishiguro, Osaka (JP); Yasuko Nozaki, Osaka (JP); and Tomohisa Okazaki, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/424,231
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jan. 6, 2020, PCT No. PCT/JP2020/000078
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/158299, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-016392 (JP), filed on Jan. 31, 2019.
Prior Publication US 2022/0115700 A1, Apr. 14, 2022
Int. Cl. H01M 10/0567 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0567 (2013.01) [H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 2004/028 (2013.01); H01M 10/0569 (2013.01)] 6 Claims
 
2. A non-aqueous electrolyte secondary battery comprising: a positive electrode, a negative electrode and a liquid electrolyte,
wherein the liquid electrolyte contains a lithium salt, methyl acetate and isopropyl acetate,
the lithium salt includes lithium bis(fluorosulfonyl)imide, and
a content of isopropyl acetate in the liquid electrolyte is 50 ppm or more and 1000 ppm or less with respect to a mass of the liquid electrolyte.