Redox battery

Abstract

Abstract PURPOSE:To realize the generation of large electromotive force by using a negative active material which is made of a titanium redox system or a chromium redox system compound and is added with a complexing agent or the like that shifts the normal electrode potential of the negative electrode to the negative side. CONSTITUTION:A redox battery 5 includes a flow-type electrolyzer 10 which contains a positive electrode 11, a negative electrode 12, and a diaphragm 13 which partitions the electrolyzer 10 and is placed between the electrodes 11 and 12. The battery 5 is charged and discharged by making an anolyte 14 to flow across tanks 6a and 6b by means of a pump 8, and making a catholyte 15 to flow across tanks 7a and 7b by means of a pump 9. The active material of the catholyte 15 is made of a titanium redox system or chromium redox system compound, and is added with either a chelating agent such as citric acid or a complexing agent which shifts the normal electrode potential to the negative side. By the means mentioned above, a battery of large electromotive force can be obtained, and the electromotive force can be controlled by adjusting the pH.

Inventors

• 👤 Hiroko Kaneko
• 👤 Takeshi Nozaki

Bibliographic Details