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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 28, 2013
Accepted December 29, 2013

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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바나듐 레독스-흐름 전지에서 집전체의 전기화학적 특성

Electrochemical Properties of Current Collector in the All-vanadium Redox Flow Battery

황갑진 오용환 유철휘 최호상^1†

Gan-Jin Hwang Yong-Hwan Oh Cheol-Hwi Ryu Ho-Sang Choi^1†

호서대학교 일반대학원 그린에너지공학과, 336-795 충남 아산시 배방읍 호서로 79번길 20 ¹경일대학교 화학공학과, 712-701 경북 경산시 하양읍 가마실길 50

Grad. School, Dept. Green Energy, Hoseo University, 20 Hoseo-ro 79 Beon-gil, Asan, Chungnam 336-795, Korea ¹Department of Chemical Engineering, Kyungil University, 50 Gamasil-gil, Hayang-eup, Gyeongsan, Gyeongbuk 712-701, Korea

choihs@kiu.kr

Korean Chemical Engineering Research, April 2014, 52(2), 182-186(5), 10.9713/kcer.2014.52.2.182 Epub 1 April 2014

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Abstract

두 종류의 집전체(BP, bipolar plate)를 사용하여 바나듐 레독스-흐름 전지(V-RFB, vanadium redox-flow battery)의 성능을 평가하였다. V-RFB의 성능평가는 60 mA/cm2의 전류밀도에서 진행하였다. A 집전체를 사용한 V-RFB의 기전력 (SOC 100%에서의 OVC)은 1.47V, B 집전체를 사용한 V-RFB의 기전력은 1.54V를 나타냈다. A 집전체를 사용한 VRFB의 셀 저항은 충전시에 4.44~5.00 Ω·cm2을, 방전시에 3.28~3.75 Ω·cm2를 보였으며, B 집전체를 사용한 V-RFB의 셀 저항은 충전시에 4.19~4.42Ω·cm2, 방전시에 4.71~5.49Ω·cm2를 나타냈다. 각 집전체를 사용한 V-RFB의 성능은 5회 충방전 실험을 진행하여 평가하였다. A 집전체를 사용한 V-RFB는 평균 전류효율 93.1%, 평균 전압효율 76.8%, 평균 에너지효율 71.4%를 나타냈으며, B 집전체를 사용한 V-RFB는 평균 전류효율 96.4%, 평균 전압효율 73.6%, 평균 에너지효율 71.0%를 나타냈다.

Two commercial carbon plates were evaluated as a current collector (bipolar plate) in the all vanadium redoxflow battery (V-RFB). The performance properties of V-RFB were test in the current density of 60 mA/cm2. The electromotive forces (OCV at SOC 100%) of V-RFB using A and B current collector were 1.47 V and 1.54 V. The cell resistance of V-RFB using A current collector was 4.44~5.00 Ω·cm2 and 3.28~3.75 Ω·cm2 for charge and discharge, respectively. The cell resistance of V-RFB using B current collector was 4.19~4.42Ω·cm2 and 4.71~5.49Ω·cm2 for charge and discharge, respectively. The performance of V-RFB using each current collector was evaluated. The performance of V-RFB using A current collector was 93.1%, 76.8% and 71.4% for average current efficiency, average voltage efficiency and average energy efficiency, respectively. The performance of V-RFB using B current collector was 96.4%, 73.6% and 71.0% for_x000D_ average current efficiency, average voltage efficiency and average energy efficiency, respectively.

Keywords

Redox-flow Battery Vanadium Redox-flow Battery Current Collector Energy Efficiency Cell Resistance

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