Patent ID: 9225037
Filing Date: 2015-12-29
Classification: H01M,Y02E

Abstract:
1. A lithium secondary battery comprising: a positive electrode; a negative electrode; a separator provided between the positive electrode and the negative electrode; and a nonaqueous electrolytic solution that contains a lithium salt, wherein the positive electrode comprises a positive electrode active material of the general formula (1) below, the negative electrode active material comprises NiSi and a solvent in the nonaqueous electrolytic solution comprises an ionic liquid that contains bis(fluorosulfonyl)imide anions as an anionic component and N-methyl-N-propylpyrrolidinium as a cationic component, wherein x and y are values that satisfy the relations x+y=2, and x:y=27.5:72.5 to 22.5:77.5.