화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터)
권호 43권 1호
발표분야 대학원생 구두발표 (발표15분)
제목 Graphitic nanofibrous electrodes for all-vanadium redox flow battery
초록 Vanadium redox flow battery (VRFB) has been focused as a one of next-generation large-scale energy storage devices. However, the polarization during the redox reactions in the carbon felt-type electrodes is one of the problems to be overcome for the stable cell performance. In this study, we fabricated graphitic nanofibrous electrode (GNE) with a high specific surface area of 213 m2 g-1 and highly graphitic structure for acid stability for a high energy efficiency of VRFB. The electrocatalytic properties of GNE led to beneficial catalytic effects such as low anodic and cathodic peak potential separation (△Ep) values of ~73.4 mV (catholyte) in a cyclic voltammetry conducted at a sweep rate of 2 mV s-1. In addition, a full cell test based on the GNE as negative and positive electrode indicated considerably improved energy efficiency of 85.8%, which is 12.4% higher than that (73.4%) of the commercial carbon felt-based VRFBs.
저자 이민의1, 곽효원1, 엄정주1, 홍연경1, 윤영수2, 진형준1
소속 1인하대, 2강원대
키워드 nanofiber; graphitie; electrode; vanadium; redox flow battery
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