| 摘要 |
PROBLEM TO BE SOLVED: To provide an ion conductive medium composition checking corrosion of an aluminum member used for an electrochemical battery. SOLUTION: In an electrochemical battery using aluminum for a current collector of a positive electrode, at least one selected from a hydrofluoric acid aqueous solution, a hydrofluoric acid anhydride, a hydrofluoric acid salt of an amine, and a quaternary alkyl ammonium fluoride or a hydrofluoric acid salt thereof, are added to an ion conductive medium of a nonaqueous electrolyte in which an organic fluorinated lithium salt is dissolved or dispersed, a gel electrolyte, or a polymer, so as to contain 0.1-100 mmol/dm<3> of fluorine concentration based on the ion conductive medium. |
