Metal-organic framework for high-performance catalyst layers in proton-exchange membrane fuel cells
- 주제(기타) Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary
- 설명문(일반) [Choi, Inyoung; Kim, Eunji; Nam, Kwan Woo] Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul 03760, South Korea; [Choi, Inyoung; Kim, Eunji; Nam, Kwan Woo] Ewha Womans Univ, Grad Program Syst Hlth Sci & Engn, Seoul 03760, South Korea; [Lim, Jinhyuk; Oh, Keun-Hwan] Korea Automot Technol Inst, 303 Pungse Ro, Chungnam 31214, South Korea; [dos Reis, Roberto; Dravid, Vinayak P.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA; [dos Reis, Roberto; Dravid, Vinayak P.] Northwestern Univ, Atom & Nanoscale Characterizat Expt Ctr, Evanston, IL 60208 USA; [dos Reis, Roberto; Dravid, Vinayak P.] Northwestern Univ, Int Inst Nanotechnol, Evanston, IL 60208 USA; [Lim, Soo Yeon] Samsung SDI, Yongin 17084, Gyeonggi Do, South Korea; [Kim, Heejin] Korea Basic Sci Inst, Div Analyt Sci, 169-148 Gwahak Ro, Daejeon 34133, South Korea; [Oh, Keun-Hwan] KRICT, Energy Mat Res Ctr, Daejeon 34114, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 ROYAL SOC CHEMISTRY
- 발행년도 2023
- URI http://www.dcollection.net/handler/ewha/000000211632
- 본문언어 영어
- Published As https://doi.org/10.1039/d3ta04377k
초록/요약
Proton (H+)-exchange membrane fuel cells (PEMFCs) are considered effective power sources for fuel cell electric vehicles because of their clean emission, air-purification capability, and excellent durability. However, the performance degradation at low relative humidity (RH) remained to be addressed. Water back-diffusion, which refers to the diffusion of water from the cathode to the membrane by a concentration gradient, could lead to a remarkable improvement in the H+ conductivity of membrane/electrode assemblies (MEAs) at low RH. This effect can be achieved by introducing a functional material with a high water content into the cathode catalyst layer. Herein, we propose a Zr-based metal-organic framework (MOF; UiO-66(Zr)-(COOH)2) as a water-rich additive material in the MEA and demonstrate that it increases the power performance of PEMFCs at low RH by promoting water back-diffusion. The high compositional and structural tunability of MOFs will expand the pool of materials to adjust the humidity level of PEMFCs. Metal-organic framework, a water-rich additive in the MEA, enhances the power performance of PEMFCs at low RH by promoting water back-diffusion.
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