Effects of Proton Exchange Membranes on Performance of Vanadium Redox Flow Battery

Chem. J. Chinese Universities

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Effects of Proton Exchange Membranes on Performance of Vanadium Redox Flow Battery

Lü Zheng-Zhong^1,2, HU Song-Lin^1,2, LUO Xuan-Li¹, WU Zeng-Hua^1,2, CHEN Li-Quan^1,2, QIU Xin-Ping^1,2

1. Graduate School at Shenzhen, Tsinghua University, Guangdong 518055, China;
2. Department of Chemistry, Tsinghua University, Beijing 100084, China

Received:2006-01-19 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
Contact: QIU Xin-Ping

Abstract

Abstract: The poly(vinylidene fluoride)-graft-poly(styrene sulfonic acid) (PVDF-g-PSSA) membrane was prepared by a solution-grafting method for vanadium redox flow battery (VRB)as the separator. The ion exchange capacity (IEC), conductivity of PVDF-g-PSSA, Nafion 117 and PE01 homogeneous membranes were investigated contrastively. The electrochemical performance of VRB with PVDF-g-PSSA, Nafion 117 and PE01 homogeneous membranes as the separator, respectively, was studied. The results show that PVDF-g-PSSA membrane possessed a high conductivity and excellent IEC with a value 3.22×10^-2 S/cm and 1.13 mmol/g respectively, at room temperature. PVDF-g-PSSA membrane showed dramatically lower vanadium ion permeability compared to Nafion 117, its coulombic efficiency and energy efficiency of VRB with PVDF-g-PSSA as the separator being higher notablely than that of VRB with Nafion 117 and PE01 homogeneous membranes as the separator.

Key words: Vanadium redox flow battery, PVDF-g-PSSA proton exchange membrane, Ion exchange capacity, Conductivity

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Lü Zheng-Zhong^1,2, HU Song-Lin^1,2, LUO Xuan-Li¹, WU Zeng-Hua^1,2, CHEN Li-Quan^1,2, QIU Xin-Ping^1,2. Effects of Proton Exchange Membranes on Performance of Vanadium Redox Flow Battery[J]. Chem. J. Chinese Universities, doi: .

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Effects of Proton Exchange Membranes on Performance of Vanadium Redox Flow Battery

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