카본 담지 백금 덴드라이트 촉매를 이용한 바나듐 레독스 흐름전지용 3.5가 바나듐 전해질의 제조
Preparation of V3.5+ Electrolyte for Vanadium Redox Flow Batteries using Carbon Supported Pt Dendrites Catalyst
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초록
본 연구에서는 유기환원제로 포름산과 촉매로 PtD/C를 사용하여 불순물이 없는 고품질 V3.5+ 전해질을 생산하였고 이를 VRFB에 적용하였다. PtD/C 촉매의 잘 배향된 3D 수상 돌기 구조는포름산 산화 반응과 바나듐 환원 반응에 높은 활성을 보여 주었다. 그 결과 PtD/C의 촉매 전환율은 2.73 mol g-1 h-1로 polyol방법을 제조된 Pt/C의 전환율 1.67 mol g-1 h-1보다 더 높았다. 또한 VRFB 충방전 실험에서 촉매 반응으로 생성된 V3.5+ 전해질은 전해 방법으로 제조 된 표준V3.5+전해질과 동일한 성능을 보여 줌으로서 VRFB의 전해질로 사용 가능함을 증명하였다.
Abstract
In this study, impurity free V3.5+ electrolytes were prepared using formic acid as a reducing agent and PtD/C as a catalyst and it was applied to VRFB. The well-oriented 3D dendrite structure of the PtD/C catalyst showed high catalytic activity in formic acid oxidation reaction and vanadium reduction reaction. As a result, the conversion ratio of electrolyte using the PtD/C was 2.73 mol g-1 h-1, which was higher than that of 1.67 mol g-1 h-1 of Pt/C prepared by the polyol method. In addition, in the VRFB charging and discharging experiment, the V3.5+ electrolyte produced by the catalytic reaction showed the same performance as the standard V3.5+ electrolyte prepared by the electrolytic method, thus proving that it can be used as an electrolyte for VRFB.
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