期刊
ELECTROCHIMICA ACTA
卷 291, 期 -, 页码 353-361出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.08.147
关键词
Hybrid sulfonated poly(ether ether ketone); Ionic cross-linking; Microphase separation; High proton conductivity; High stability
资金
- National Natural Science Foundation of China [21802038, 51871091, 91545205]
- Natural Science Foundation of Hubei Province [2018CFB329]
- Hubei key Laboratory of Pollutant Analysis & Reuse Technology [PA20170202]
- Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology [SKLPST201704]
An ideal proton exchange membrane for fuel-cell application should possess excellent dimensional stability, high ionic conductivity and inexpensiveness. Introducing cross-links into the polymer structures is a popular strategy to alleviate the tradeoff between swelling ratio and ionic conductivity of high ion exchange capacity proton exchange membranes. However, the cross-links in these membranes will block the transport of H+, resulting in unfavorable decrease of conductivity. Here we report a systematic study of acSPEEK-S-x membranes with alkyl chain attached ionic cross-links to demonstrate how the unique cross-links can improve both the conductivity and swelling behavior of the materials. Compared to the conventional SPEEK, in addition to high anti-oxidative stability, the ionic conductivity and swelling behavior of the acSPEEK-Sx samples are significantly improved. A high proton conductivity of 101.2 mS cm(-1) and a low swelling degree of 15.0% are observed in the acSPEEK-S-6 membrane at the temperature of 80 degrees C. Based on the high-performance acSPEEK-S6 sample, a peak power density of 750 mW cm(-2) is achieved at 60 degrees C, which is similar or superior to those of Nafion 112 (710 mW cm(-2)) under the same measurement conditions. (c) 2018 Elsevier Ltd. All rights reserved.
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