公开(公告)号：US20230231199A1

公开(公告)日：2023-07-20

申请号：US18001623

申请日：2021-06-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Hiroshi KADOMA ,  Fumiko TANAKA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Shotaro MURATSUBAKI ,  Kaori FUJIE ,  Taku ICHINO

IPC: H01M10/0569 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M10/0568 ,  H01M2300/0034

Abstract: An object is to provide a nonaqueous solvent, a secondary battery, or a vehicle having a wide usable temperature range and high heat resistance. The nonaqueous solvent of the present invention contains an ionic liquid at greater than or equal to 50 vol % and less than or equal to 95 vol % and a fluorinated cyclic carbonate, and the ionic liquid contains an imidazolium cation. The nonaqueous solvent of the present invention has low viscosity at low temperatures and high heat resistance, thereby having a wide usable temperature range.