VANADIUM REDOX BATTERY
PROBLEM TO BE SOLVED: To provide a vanadium redox battery capable of reducing hydrogen generated from a negative electrode, while preventing the battery capacity or the battery output from lowering.SOLUTION: A vanadium redox battery 10 includes: a positive electrode 20 containing a positive electrod...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a vanadium redox battery capable of reducing hydrogen generated from a negative electrode, while preventing the battery capacity or the battery output from lowering.SOLUTION: A vanadium redox battery 10 includes: a positive electrode 20 containing a positive electrode active material containing vanadium ions having an oxidation number changing between pentavalent and tetravalent by oxidation-reduction, or positive ions containing vanadium having an oxidation number changing between pentavalent and tetravalent; a negative electrode 30 containing a negative electrode active material containing vanadium ions having an oxidation number changing between divalent and trivalent by oxidation-reduction, or positive ions containing vanadium having an oxidation number changing between divalent and trivalent; a barrier membrane 12 sectioning the positive electrode 20 and negative electrode 30, and passing hydrogen ions; and an electrolyte. The positive electrode 20 contains a carbon material. A hydrogen oxidation catalyst is carried on the surface of a carbon material.SELECTED DRAWING: Figure 1
【課題】負極で発生した水素を減少させることが可能であり、電池容量や電池出力の低下を防止することのできるバナジウムレドックス電池を提供する。【解決手段】バナジウムレドックス電池10は、酸化還元反応によって、5価及び4価の間で酸化数が変化するバナジウムイオン又は5価及び4価の間で酸化数が変化するバナジウムを含む陽イオンを含有する正極活物質を含む正極20と、酸化還元反応によって、2価及び3価の間で酸化数が変化するバナジウムイオン又は2価及び3価の間で酸化数が変化するバナジウムを含む陽イオンを含有する負極活物質を含む負極30と、正極20と負極30とを区画するとともに、水素イオンを通過させる隔膜12と、電解液と、を含む。正極20は、炭素材料を含む。炭素材料の表面に、水素酸化触媒が担持されている。【選択図】図1 |
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