수소화 붕소 나트륨 (NaBH4) 과 이산화탄소의 환원을 이용한바나듐 레독스 흐름전지용 탄소 촉매 개발
Development of Boron Doped Carbon Using CO2 Reduction with NaBH4 for Vanadium Redox Flow Battery
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초록
본 연구에서는 수소화 붕소 나트륨 (NaBH4)를 이용하여 고온에서 이산화탄소 (CO2)를 환원시켜 붕소가 도핑된 카본을 제조하였고, 이를 카본 펠트에 코팅하여 바나듐 레독스 흐름전지용 전극으로 적용하였다. 전기화학적 성능 평가 결과, 순수 카본펠트 대비 붕소 도핑된 카본으로 코팅된 카본펠트의 가역성이 약 20% 향상되었고 전하 전달 저항이 60% 감소하였다. 충/방전 결과에서는, 에너지 밀도와 에너지 효율이 각각 21%와 12.4% 향상되었다. 이러한 결과는 CO2를 환원시켜 제조한 탄소가 레독스 흐름전지용 전극소재로 사용될 수 있는 가능성을 보여준다.
Abstract
In this study, boron - doped carbon was prepared by reducing carbon dioxide (CO2) at high temperature by using sodium borohydride (NaBH4). The boron - doped carbon was coated on carbon felt and applied as an electrode for a vanadium redox battery cell. As a result of electrochemical performance evaluation, reversibility of carbon felt coated with boron doped carbon compared to pure carbon felt was improved by about 20% and charge transfer resistance was reduced by 60%. In the charge / discharge results, energy density and energy efficiency were improved by 21% and 12.4%, respectively. These results show that carbon produced by reduction of CO2 can be used as electrode material for redox flow battery.
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