Perovskite-Carbon Joint Substrate for Practical Application in Proton Exchange Membrane Fuel Cells under Low-Humidity/High-Temperature Conditions

Zhang, Jun and Hu, Bin and Deng, Xiang and Li, Chen and Wu, Yusun and Zhou, Chuan and Zhang, Dezhu and Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Zhou, Wei and Shao, Zongping (2022) Perovskite-Carbon Joint Substrate for Practical Application in Proton Exchange Membrane Fuel Cells under Low-Humidity/High-Temperature Conditions. ACS Applied Materials and Interfaces, 14 (27). pp. 30872-30880. ISSN 1944-8244


Abstract

Highly active catalysts with promising water retention are favorable for proton exchange membrane fuel cells (PEMFCs) operating under low-humidity/high-temperature conditions. When PEMFCs operate under low-humidity/high-temperature conditions, performance attenuation rapidly occurs owing to reduced proton conductivity of dehydrated membrane electrode assemblies. Herein, we load platinum onto a perovskite-carbon joint substrate (BaZr0.1Ce0.7Y0.1Yb0.1O3-σ-XC-72R) to construct a highly active and durable catalyst with good water retention capacity. We propose that the Pt/(BZCYYb-C) catalyst layer at cathode can promote the water back diffusion of produced water from the cathode to the membrane, thus preventing the decay of fuel-cell performance under low-humidity/high-temperature conditions. The catalyst exhibited outstanding mass activity of 0.542 A mgpt–1 at 0.9 V vs RHE. PEMFCs with such a catalyst delivered very high peak power densities (1.70/1.14 W cm–2 under H2–O2/air conditions at 70 °C) and kept 85.3%/92.1% of initial performance values under low-humidity/high-temperature conditions (relative humidity 60%@70 °C/100 °C).


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 11 Jul 2022 01:47
Last Modified: 25 Aug 2022 05:18
Uncontrolled Keywords: proton exchange membrane fuel cells; perovskite; water retention capacity; water back diffusion; low-humidity/high-temperature
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340301 Inorganic materials (incl. nanomaterials)
40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion
Identification Number or DOI: https://doi.org/10.1021/acsami.2c06259
URI: http://eprints.usq.edu.au/id/eprint/49443

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