期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 18, 页码 15720-15732出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02884
关键词
anion exchange membrane; polyelectrolyte; fuel cells; N-spirocyclic ammonium; alkaline stability; ion conductivity
资金
- National Key Research and Development Program of China [2016YFB0101203]
- National Natural Science Foundation of China [21776014, U1705253]
- International S&T Cooperation Program of China [2013DFA51860]
- Fundamental Research Funds for the Central Universities [JC1504]
In response to prepare high-stable and ion-conducting polyelectrolyte for hydroxide exchange membrane (HEM) applications, we present an ultrastable polyelectrolyte based on six-membered heterocyclic 6-azonia-spiro[5.5]undecane (ASU) and polyphenyl ether (PPO). A series of ASU-functionalized PPO polyelectrolytes (ASU-PPO), which can be easily dissolved in low-boiling pointing solvent, have been successfully synthesized by a remote-grafting method. The ASU precursor is stable in 1 M NaOH/D2O at 80 degrees C for 2500 h as well as in 5 M NaOH/D2O at 80 degrees C for 2000 h, and the predicted half-life of the ASU precursor would exceed 10 000 h, even higher in the future. Besides, these remote-grafting ASU-PPO polyelectrolytes are stable in 1 M NaOH(aq) at 80 degrees C for 1500 h. Robust and pellucid segmented ASU and triple-ammonium-functionalized PPO-based HEMs attach OH- conductivity of 96 mS/cm at 80 degrees C and realize maximal power density of 178 mW/cm(2) under current density of 401 mA/cm(2).
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