세가지 다른 형태의 탄소촉매 적용에 따른 바나듐레독스흐름전지 성능 변화에 관한 연구

Abstract

Abstract >> In this study, we carry out a study on how to improve performance of vanadium redox flow battery(VRFB) through promoting reaction rate of rate determining vanadium reaction ([VO] 2+ /[VO 2 ] + ). In order to dothat, three different carbons like Vulcan (XC-72), CMK3 and MSU-F-C are adopted as the catalysts, while their catalytic activity and reaction reversibility are evaluated using half-cell tests. Their topological images are alsomeasured by TEM. For estimation of the VRFB performance, multiple charge-discharge curves of VRFBs includingthe catalysts are measured by single cell tests. As a result of that, MSU-F-C shows relatively excellent catalytic activity and reaction reversibility as well as large surface area compared to those of Vulcan (XC-72) and CMK3.Also, in terms of the performance of VRFBs including the catalysts, VRFB including MSU-F-C indicates (i) low charging/discharging overpotentials and low internal resistance, (ii) high charge/discharge capacities and (iii) highenergy efficiency. These VRFB performance data are well agreed with results on catalytic activity and reactionreversibility. The reason that MSU-F-C induces superior VRFB performances is attributed to (i) its large surfacearea and (ii) its hydrophilic surface functional groups that mainly consist of hydroxyl bonds that are supposedto play active surface site role for facilitaing [VO]