Journal
ELECTROCHIMICA ACTA
Volume 268, Issue -, Pages 295-303Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.01.064
Keywords
Anion exchange membrane; Hamburger structure; Silica; Fuel cell
Categories
Funding
- National Key Research and Development Program of China [2016YFB0101203]
- National Natural Science Foundation of China [21376022, 21776014]
- International S&T Cooperation Program of China [2013DFA51860]
- Fundamental Research Funds for the Central Universities [JC1504]
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With the intention of improving the comprehensive performance of anion exchange membranes (AEMs), a series of hamburger-structure AEMs based on triple-ammonium side chain poly(2,6-dimethyl-1,4-phenylene oxide) (TA-PPO) membrane were prepared. 1, 2-dimetylimidazolium-modified silica (Im-SiO2) was introducing to the surface of the TA-PPO membrane to fabricate a hamburger structure of Im-SiO2/TA-PPO membrane. The hamburger structure of the Im-SiO2/TA-PPO membrane is clearly observed by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) linear scanning. Surprisingly, the Im-SiO2 layer on the surface of TA-PPO shows many valuable properties. Such as impressive ion conduction ability, water retaining capacity, and swelling resistance. Besides, the Im-SiO2 layer serves as a preserver to protect the TA-PPO membrane from being attacked by hydroxide and oxygen radical. Compared with TA-PPO membrane, the Im-SiO2/TA-PPO composite membrane exhibits the higher hydroxide conductivity and dimensional stability, and even higher alkaline stability and oxidation resistance. Typically, the Im-SiO2/TA-PPO composite membrane exhibits a maximum hydroxide conductivity of 105 mS/cm at 80 degrees C with a swelling ratio of 8.2%. Therefore, the hamburger structure of the Im-SiO2/TA-PPO membranes provides a new and reliable method to improve the comprehensive performance of AEM. (c) 2018 Published by Elsevier Ltd.
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