Beneficial use of rotatable-spacer side-chains in alkaline anion exchange membranes for fuel cells

被引：215

作者：

Zhu, Yuan ^{[1
]}

Ding, Liang ^{[1
]}

Liang, Xian ^{[1
]}

Shehzad, Muhammad A. ^{[1
]}

Wang, Lianqin ^{[2
]}

Ge, Xiaolin ^{[1
]}

He, Yubin ^{[1
]}

Wu, Liang ^{[1
]}

Varcoe, John R. ^{[2
]}

Xu, Tongwen ^{[1
]}

机构：

[1] Univ Sci & Technol China, Sch Chem & Mat Sci, Collaborat Innovat Ctr Chem Energy Mat, CAS Key Lab Soft Matter Chem, Hefei 230026, Peoples R China

[2] Univ Surrey, Dept Chem, Guildford GU2 7XH, Surrey, England

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2018年 / 11卷 / 12期

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

ELECTROLYTE MEMBRANES; POLY(ETHER SULFONE)S; CONDUCTIVITY; STABILITY; AMMONIUM; CATHODES; LITHIUM; WATER; ACID;

D O I：

10.1039/c8ee02071j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Side-chain-type polymer architectures have been extensively studied for development of highly conductive fuel cell membranes. However, the commonly used rigid, hydrophobic spacers (between the ionic end-group and polymer backbone) limit self-assembly of ionic side-chains and, therefore, ion transport. Herein, we report a flexible, hydrophilic side-chain-type anion exchange membrane (AEM), where ethylene oxide spacers are incorporated into imidazolium-containing cationic side-chains. AFM and SAXS analysis confirm that the flexible spacers facilitate self-assembly of the ionic side-chains to form continuous conducting channels. Most importantly, both in situ FTIR spectroscopy and molecular dynamic theory simulations indicate that the ethylene oxide spacers are capable of hydrogen bonding to both H2O molecules and hydrated OH- ions. This unique auxiliary function facilitates both ion and H2O transport during fuel cell operation. The resultant AEM exhibits a peak power density of 437 mW cm(-2) at 65 degrees C when tested in a H-2/O-2 single-cell anion-exchange membrane fuel cell, which is among the highest reported for comparable side-chain-type AEMs.

引用

页码：3472 / 3479

页数：8

共 42 条

[21] Novel electrolyte membranes and non-Pt catalysts for low temperature fuel cells [J].