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High-performance polymer electrolyte membranes incorporated with 2D silica nanosheets in high-temperature proton exchange membrane fuel cells

查看全文 作　　者：Zunmin [1]Guo;Jianuo [1]Chen;Jae Jong [2]Byun;Rongsheng [2]Cai;Maria Perez-[1]Page;Madhumita [1]Sahoo;Zhaoqi [1]Ji;Sarah [2]J.Haigh;Stuart [1]M.Holmes 高影响力作者 机构地区：[1]Department of Chemical Engineering and Analytical Science,The University of Manchester,M139PL,United Kingdom;[2]Department of Materials,The University of Manchester,M139PL,United Kingdom高影响力机构 出　　处：《Journal of Energy Chemistry》索引2022年第31卷第1期,共13页高影响力期刊 基　　金：the EPSRC grant EP/009050/1;supported by the Henry Royce Institute for Advanced Materials which is funded by EPSRC grants EP/S019367/1,EP/P025021/1,EP/R00661X/1 and EP/P025498/1. 摘　　要：Silica nanosheets(SN)derived from natural vermiculite(Verm)were successfully incorporated into polyethersulfone-polyvinylpyrrolidone(PES-PVP)polymer to fabricate high-temperature proton exchange membranes(HT-PEMs).The content of SN filler was varied(0.1-0.75 wt%)to study its influence on proton conductivity,power density and durability.Benefiting from the hydroxyl groups of SN that enable the formation of additional proton-transferring pathways,the inorganic-organic membrane displayed enhanced proton conductivity of 48.2 mS/cm and power density of 495 mW/cm^(2) at 150℃ without humidification when the content of SN is 0.25 wt%.Furthermore,exfoliated SN(E-SN)and sulfonated SN(S-SN),which were fabricated by a liquid-phase exfoliation method and silane condensation,respectively,were embedded in PES-PVP polymer matrix by a simple blending method.Due to the significant contribution from sulfonic groups in S-SN,the membrane with 0.25 wt%S-SN reached the highest proton conductivity of51.5 mS/cm and peak power density of 546 mW/cm^(2) at150℃,48%higher than the pristine PES-PVP membranes.Compared to unaltered PES-PVP membrane,SN added hybrid composite membrane demonstrated excellent durability for the fuel cell at 150℃.Using a facile method to prepare 2D SN from natural clay minerals,the strategy of exfoliation and functionalization of SN can be potentially used in the production of HT-PEMs. 关 键 词：Silica nanosheets VERMICULITE High-temperature proton exchange membrane Proton conductivity
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