Quaternary phosphonium-functionalized poly(ether ether ketone) as highly conductive and alkali-stable hydroxide exchange membrane for fuel cells
发布时间：2019-03-09
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- 论文类型：
- 期刊论文
- 发表时间：
- 2014-09-15
- 发表刊物：
- JOURNAL OF MEMBRANE SCIENCE
- 收录刊物：
- Scopus、EI、SCIE
- 文献类型：
- J
- 卷号：
- 466
- 页面范围：
- 220-228
- ISSN号：
- 0376-7388
- 关键字：
- Poly(ether ether ketone); Quaternary phosphonium; Phosphonization; Hydroxide exchange membrane; Alkaline membrane fuel cells
- 摘要：
- A series of quaternary phosphonium-functionalized poly(ether ether ketone)s (PEEK-QPOHs) have been synthesized by phosphorization reaction, and their membranes have been prepared by a solution casting method. Ion exchange capacity (IEC) of PEEK-QPOH membranes ranges from 0.89 to 1.19 mmol g(-1) with the degree of chloromethylation from 70% to 126%. Not only are PEEK-QPOH polymers soluble in typical high-boiling-point membrane-forming solvents, but also they are soluble in some low-boiling-point water-miscible solvents (low alcohols), implying their ability to serve as both membranes and ionomers. PEEK-QPOH membranes showed high hydroxide conductivity, e.g., a PEEK-QPOH 126% membrane (with IEC of 1.19 mmol g(-1)) exhibited 61 and 89 mS cm(-1) at 20 degrees C and 60 degrees C, respectively. Based on the same polymer backbone of PEEK, quaternary phosphonium-functionalized PEEK membranes are more hydroxide-conductive and more alkali-stable than quaternary ammonium- and imidazolium-functionalized counterparts. All these properties indicate PEEK-QPOH is one of the most promising HEM materials for potential applications in alkaline membrane fuel cells. (C) 2014 Published by Elsevier B.V.
- 第一作者
- Yan, Xiaoming
- 合写作者
- Wu, Xuemei,Zheng, Wenji,Ruan, Xuehua,Gu, Shuang,He, Gaohong
- 通讯作者
- He, GH (reprint author), Dalian Univ Technol, Sch Chem Engn, Res & Dev Ctr Membrane Sci & Technol, State Key Lab Fine Chem, Dalian 116024, LN, Peoples R China.