| abstract |
In the present embodiment, the following general formula (1): O = P (O—R 1 ) (O—R 2 ) (O—R 3 ) (1) [In the formula (1), R 1 , R 2 and R 3 are an alkyl group or the like, or a group containing an ether bond represented by —R 4 —O—R 5 (R 4 represents an alkylene group, R 5 represents an alkyl group), At least one of R 1 , R 2 and R 3 is a group containing an ether bond, and at least one contains fluorine. ] And a positive electrode active material having a charge / discharge region of 4.5 V or higher with respect to lithium. |