Effects of different ratios of flexible links and rigid structures in side chains on membrane properties for HT-PEM applications

Luo, Yu; Yu, Di; Gao, Tongtong; Bai, Wenyu; Zhang, Shuyu; Guan, Xianfeng; Wu, Wanzhen; Wang, Shuang

doi:10.1016/j.ijhydene.2024.06.147

International Journal of Hydrogen Energy

2024

DOI: 10.1016/j.ijhydene.2024.06.147

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Effects of different ratios of flexible links and rigid structures in side chains on membrane properties for HT-PEM applications

Yu Luo,

Di Yu,

Tongtong Gao

et al.

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2024

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Cited by 2 publications

References 41 publications

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Side-chain vertical imidazole backbone enhances phosphoric acid uptake in Poly(2,5-benzimidazole) membranes for high-temperature PEMFCs

Wang,

Ling,

Liu

et al. 2024

International Journal of Hydrogen Energy

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Side-chain vertical imidazole backbone enhances phosphoric acid uptake in Poly(2,5-benzimidazole) membranes for high-temperature PEMFCs

Wang,

Ling,

Liu

et al. 2024

International Journal of Hydrogen Energy

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Strategies for Mitigating Phosphoric Acid Leaching in High-Temperature Proton Exchange Membrane Fuel Cells

Xu,

Chen,

Huang

et al. 2024

Molecules

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High-temperature proton exchange membrane fuel cells (HT-PEMFCs) have become one of the important development directions of PEMFCs because of their outstanding features, including fast reaction kinetics, high tolerance against impurities in fuel, and easy heat and water management. The proton exchange membrane (PEM), as the core component of HT-PEMFCs, plays the most critical role in the performance of fuel cells. Phosphoric acid (PA)-doped membranes have showed satisfied proton conductivity at high-temperature and anhydrous conditions, and significant advancements have been achieved in the design and development of HT-PEMFCs based on PA-doped membranes. However, the persistent issue of HT-PEMFCs caused by PA leaching remains a challenge that cannot be ignored. This paper provides a concise overview of the proton conduction mechanism in HT-PEMs and the underlying causes of PA leaching in HT-PEMFCs and highlights the strategies aimed at mitigating PA leaching, such as designing crosslinked structures, incorporation of hygroscopic nanoparticles, improving the alkalinity of polymers, covalently linking acidic groups, preparation of multilayer membranes, constructing microporous structures, and formation of micro-phase separation. This review will offer a guidance for further research and development of HT-PEMFCs with high performance and longevity.

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Effects of different ratios of flexible links and rigid structures in side chains on membrane properties for HT-PEM applications

Cited by 2 publications

References 41 publications

Side-chain vertical imidazole backbone enhances phosphoric acid uptake in Poly(2,5-benzimidazole) membranes for high-temperature PEMFCs

Side-chain vertical imidazole backbone enhances phosphoric acid uptake in Poly(2,5-benzimidazole) membranes for high-temperature PEMFCs

Strategies for Mitigating Phosphoric Acid Leaching in High-Temperature Proton Exchange Membrane Fuel Cells

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