화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.109, 245-252, May, 2022
DOI10.1016/j.jiec.2022.02.009  Export Citation
Toward highly robust reversal-tolerant anodes in polymer electrolyte membrane fuel cells
Dong-Hyun Lee1, Gisu Doo1, Sungyu Choi1, Dong Wook Lee1, Jonghyun Hyun1, Jiyun Kwen1, Jun Young Kim2, and Hee-Tak Kim1, 3, †
  • 1Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
  • 2bR&D Division, KOLON Industries Inc., 110, Magokdong-ro, Gangseo-gu, Seoul 07793, Republic of Korea
  • 3Advanced Battery Center, KAIST Institute for the NanoCentury, Korea Advanced Institute of Science and Technology (KAIST), 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
E-mail:
A reversal tolerant anode (RTA) mitigates carbon corrosion under hydrogen starvation by promoting a water oxidation reaction with an oxygen-evolution-reaction catalyst. However, achieving long-lasting and repeatable voltage-reversal tolerance remains a challenge. Herein, we propose highly robust bilayered RTAs consisting of IrOx and Pt black layers (IrOx//Pt) for use in polymer electrolyte membrane fuel cells. Compared to bi-layered IrOx//Pt/C RTAs, the carbon-free IrOx//Pt RTAs have an exceptionally longer voltage-reversal time and unprecedented level of repeatability. Additionally, placing the IrOx layer on the membrane side of the RTA is more effective in maintaining the water oxidation reaction than placing it on the diffusion layer side. Oxidative dissolution of IrOx in the IrOx//Pt RTAs under repeated voltage reversals emphasizes the importance of lowering the water oxidation potential of RTA. The carbon-free, bi-layered RTA design presented in this work provides a new path for achieving long-lasting and repeatable voltagereversal tolerance.
Keywords:Polymer electrolyte membrane fuel cell;Hydrogen starvation;Durability;Reversal tolerant anode;IrOx dissolution
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