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题名: Morphology and Electrochemical Properties of Perfluorosulfonic Acid Ionomers for Vanadium Flow Battery Applications: Effect of Side-Chain Length
作者: Ding, Cong1, 2;  Zhang, Huamin1;  Li, Xianfeng1;  Zhang, Hongzhang1, 2;  Yao, Chuan1, 2;  Shi, Dingqin1
关键词: electrochemistry ;  ion channels ;  membranes ;  polymers ;  vanadium
刊名: CHEMSUSCHEM
发表日期: 2013-07-01
DOI: 10.1002/cssc.201300014
卷: 6, 期:7, 页:1262-1269
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Perfluorosulfonic acid ionomers (PFSI) with different side-chain lengths have been investigated with respect to their morphology and electrochemical properties in vanadium flow batteries (VFB). The results indicated that the membrane with the shortest side chains (SSC-M2) displayed small ion clusters and a low degree of hydrophobic-hydrophilic separation, which is favourable to reduce the cross-over of vanadium ions in the VFB. SSC-M2 shows a similar proton conductivity to Nafion, which carries longer ionic side chains but with much lower ion permeability. As a result, the VFB assembled with SSC-M2 exhibited a superior coulombic efficiency and a voltage efficiency close to that of Nafion115. Insitu mass transfer revealed that SSC-M2 had a remarkably low degree of vanadium and water transfer across the membrane, which resulted in lower capacity fading than in the case of Nafion115. These results indicate that a membrane with short side chains is an ideal option in the fabrication of high-performance VFBs with low capacity loss.
关键词[WOS]: CONDUCTING POLYMER MEMBRANES ;  CATION-EXCHANGE MEMBRANES ;  METHANOL FUEL-CELLS ;  X-RAY-SCATTERING ;  REDOX BATTERY ;  NAFION ;  DIFFUSION ;  TRANSPORT ;  STORAGE ;  WATER
语种: 英语
WOS记录号: WOS:000321309600025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137596
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Energy Storage, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Ding, Cong,Zhang, Huamin,Li, Xianfeng,et al. Morphology and Electrochemical Properties of Perfluorosulfonic Acid Ionomers for Vanadium Flow Battery Applications: Effect of Side-Chain Length[J]. CHEMSUSCHEM,2013,6(7):1262-1269.
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