High-performance ether-free branched poly(isatin terphenyl fluorene) with sulfonated pendant side chains for proton exchange membrane fuel cells

Li, Yeyang; Liao, Junbin; Lu, Yueyue; Shen, Jiangnan

doi:10.1016/j.jpowsour.2024.235079

Journal of Power Sources

2024

DOI: 10.1016/j.jpowsour.2024.235079

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High-performance ether-free branched poly(isatin terphenyl fluorene) with sulfonated pendant side chains for proton exchange membrane fuel cells

Yeyang Li,

Junbin Liao,

Yueyue Lu

et al.

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Sulfonated Poly(fluorene alkylene)s Containing Dual Hydrophilic and Hydrophobic Side Chains for High-Performance Proton Exchange Membranes

Liang,

Liu,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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Proton exchange membranes (PEMs) based on aromatic hydrocarbon polymers are considered promising alternatives to Nafion membranes. However, insufficient proton conductivity and stability hinder practical applications of hydrocarbon PEMs. Herein, we propose a series of aryl ether-free PEMs based on sulfonated poly(fluorene alkylene)s (SHF-HHF-x) by simultaneously incorporating dual hydrophilic and hydrophobic side chains. Benefiting from the featured side-chain structure, a well-defined microphase separation was formed within the SHF-HHF-x membranes. As a result, the SHF-HHF-x membranes exhibit high proton conductivity (up to 213.1 mS cm −1 at 80 °C), as well as a low swelling ratio (<30%). In addition, these membranes demonstrated excellent oxidative stability with a high residual weight (>86%), after soaking in Fenton's reagent (3% H 2 O 2 and 4 ppm Fe 2+ ) for 10 h. The H 2 −O 2 single cell assembled with the SHF-HHF-70 PEM reached a peak power density of 941.6 mW cm −2 at 80 °C. This study offers a design strategy for the preparation of high-performance PEMs.

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Sulfonated Poly(fluorene alkylene)s Containing Dual Hydrophilic and Hydrophobic Side Chains for High-Performance Proton Exchange Membranes

Liang,

Liu,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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show abstract

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High-performance ether-free branched poly(isatin terphenyl fluorene) with sulfonated pendant side chains for proton exchange membrane fuel cells

Cited by 1 publication

References 67 publications

Sulfonated Poly(fluorene alkylene)s Containing Dual Hydrophilic and Hydrophobic Side Chains for High-Performance Proton Exchange Membranes

Sulfonated Poly(fluorene alkylene)s Containing Dual Hydrophilic and Hydrophobic Side Chains for High-Performance Proton Exchange Membranes

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