Morphology and electrochemical properties of perfluorosulfonic acid ionomers for vanadium flow battery applications: effect of side-chain length.
作者： Cong Ding , Huamin Zhang , Xianfeng Li , Hongzhang Zhang , Chuan Yao
关键词:
摘要: Perfluorosulfonic acid ionomers (PFSI) with different side-chain lengths have been investigated respect to their morphology and electrochemical properties in vanadium flow batteries (VFB). The results indicated that the membrane shortest side chains (SSC-M2) displayed small ion clusters a low degree of hydrophobic-hydrophilic separation, which is favourable reduce cross-over ions VFB. SSC-M2 shows similar proton conductivity Nafion, carries longer ionic but much lower permeability. As result, VFB assembled exhibited superior coulombic efficiency voltage close Nafion115. Insitu mass transfer revealed had remarkably water across membrane, resulted capacity fading than case These indicate short an ideal option fabrication high-performance VFBs loss.
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