| abstract |
A secondary battery capable of improving battery characteristics is provided. A metal acetylide, a metal vinylidene, a metal vinylene, a metal vinyl, and a metal phenyl, each of which includes an electrolyte solution together with a positive electrode and a negative electrode, and at least one of the negative electrode and the electrolyte solution has a structure represented by the formula (1). And metal compounds having an unsaturated carbon bond such as metal cyclopentadiene. [Selection figure] None |