| 摘要 |
PROBLEM TO BE SOLVED: To provide a vanadium redox battery that suppresses self-discharge.SOLUTION: A vanadium redox battery includes a positive electrode active material, a negative electrode, a barrier membrane and electrolytic solution. The positive electrode active material contains cations including vanadium ions whose oxidation number varies between pentavalent and tetravalent or vanadium whose oxidation number varies between pentavalent and tetravalent by an oxidation-reduction reaction. The negative electrode contains a negative electrode active material containing cations which contain vanadium ions whose oxidation number varies between divalent and trivalent or vanadium whose oxidation number varies between divalent and trivalent by an oxidation-reduction reaction. The barrier membrane compartments a region containing the positive electrode and a region containing the negative electrode and passes hydrogen ions therethrough. Electrolytic solution is contained in each of the region containing the positive electrode and the region containing the negative electrode. Surface active agent is contained in any one of the electrolytic solution contained in the region containing the positive electrode and the electrolytic solution contained in the region containing the negative electrode, or both of the electrolytic solution contained in the region containing the positive electrode and the electrolytic solution contained in the region containing the negative electrode.SELECTED DRAWING: None |
