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Nanomaterials
Volume 12
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10.3390/nano12050841
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Article

High Performance and Self-Humidifying of Novel Cross-Linked and Nanocomposite Proton Exchange Membranes Based on Sulfonated Polysulfone

by
Xinyu Li
,
Zhongxin Zhang
,
Zheng Xie
,
Xinrui Guo
,
Tianjian Yang
,
Zhongli Li
,
Mei Tu
and
Huaxin Rao
*
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2022, 12(5), 841; https://doi.org/10.3390/nano12050841
Submission received: 19 January 2022 / Revised: 28 February 2022 / Accepted: 1 March 2022 / Published: 2 March 2022
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Abstract

The introduction of inorganic additive or nanoparticles into fluorine-free proton exchange membranes (PEMs) can improve proton conductivity and have considerable effects on the performance of polymer electrolyte membrane fuel cells. Based on the sol–gel method and in situ polycondensation, novel cross-linked PEM and nanocomposite PEMs based on a sulfonated polysulfone (SPSU) matrix were prepared by introducing graphene oxide (GO) polymeric brushes and incorporating Pt-TiO2 nanoparticles into an SPSU matrix, respectively. The results showed that the incorporation of Pt-TiO2 nanoparticles could obviously enhance self-humidifying and thermal stability. In addition, GO polymer brushes fixed on polymeric PEM by forming a cross-linked network structure could not only solve the leakage of inorganic additives during use and compatibility problem with organic polymers, but also significantly improve proton conductivity and reduce methanol permeability of the nanocomposite PEM. Proton conductivity, water uptake and methanol permeability of the nanocomposite PEM can be up to 6.93 mS cm−1, 46.58% and be as low as 1.4157 × 10−6 cm2 s−1, respectively, which represent increases of about 70%, about 22% and a decrease of about 40%, respectively, compared with that of primary SPSU. Therefore, the synergic action of the covalent cross-linking, GO polymer brush and nanoparticles can significantly and simultaneously improve the overall performance of the composite PEM.
Keywords: fuel cells; proton exchange membrane; polymer brush; sulfonated polysulfone; graphene oxide; self-humidifying; nanoparticles fuel cells; proton exchange membrane; polymer brush; sulfonated polysulfone; graphene oxide; self-humidifying; nanoparticles

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MDPI and ACS Style

Li, X.; Zhang, Z.; Xie, Z.; Guo, X.; Yang, T.; Li, Z.; Tu, M.; Rao, H. High Performance and Self-Humidifying of Novel Cross-Linked and Nanocomposite Proton Exchange Membranes Based on Sulfonated Polysulfone. Nanomaterials 2022, 12, 841. https://doi.org/10.3390/nano12050841

AMA Style

Li X, Zhang Z, Xie Z, Guo X, Yang T, Li Z, Tu M, Rao H. High Performance and Self-Humidifying of Novel Cross-Linked and Nanocomposite Proton Exchange Membranes Based on Sulfonated Polysulfone. Nanomaterials. 2022; 12(5):841. https://doi.org/10.3390/nano12050841

Chicago/Turabian Style

Li, Xinyu, Zhongxin Zhang, Zheng Xie, Xinrui Guo, Tianjian Yang, Zhongli Li, Mei Tu, and Huaxin Rao. 2022. "High Performance and Self-Humidifying of Novel Cross-Linked and Nanocomposite Proton Exchange Membranes Based on Sulfonated Polysulfone" Nanomaterials 12, no. 5: 841. https://doi.org/10.3390/nano12050841

APA Style

Li, X., Zhang, Z., Xie, Z., Guo, X., Yang, T., Li, Z., Tu, M., & Rao, H. (2022). High Performance and Self-Humidifying of Novel Cross-Linked and Nanocomposite Proton Exchange Membranes Based on Sulfonated Polysulfone. Nanomaterials, 12(5), 841. https://doi.org/10.3390/nano12050841

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