电化学2017，Vol.23Issue(4)：409-419,11.DOI:10.13208/j.electrochem.160307
表面修饰模式对Nafion离子选择性影响及在VRFB中的应用
Effects of Surface Modification Modes on Proton-over-Vanadium Ion Selectivity of Nafion（R） Membrane for Application in Vanadium Redox Flow Battery
摘要
Abstract
The effect of surface modification modes on proton-over-vanadium ion selectivity was studied by spin-coating chitosan-Phosphotungstic Acid (PWA) as a single or double layer on Nafion membrane surface.To suppress the vanadium ions permeation through the Nafion（R） membrane in a vanadium redox flow battery (VRFB),the single surface-modified Nafion membrane (Nafion/chitosan-PWA)s and double surface-modified Nafion membrane (Nafion/chitosan-PWA)D demonstrated a 89.9％ and 92.7％ reduction of vanadium ion permeability in comparison with pristine Nafion,respectively.The (Nafion/chitosan-PWA)D exhibited better selectivity between proton and vanadium ions than the (Nafion/chitosan-PWA)s at the same layer thickness.Furthermore,the columbic efficiency for the VRFB single cell based on the (Nafion/chitosan-PWA)D at an optimized thickness was 93.5％ and the energy efficiency was 80.7％ at a charge-discharge current density of 30 mA· cm2,which were higher than the (Nafion/chitosan-PWA)s and pristine Nafion membrane.The modified membranes also possessed adequate chemical stability in the VRFB during charge-discharge cycling measurements.关键词
表面修饰模式/钒离子渗透率/离子选择性/全钒液流电池Key words
surface modification mode/vanadium ion permeability/ionic selectivity/vanadium redox flow battery分类
化学化工引用本文复制引用
谭青龙,王海宁,卢善富,梁大为,武春晓,相艳..表面修饰模式对Nafion离子选择性影响及在VRFB中的应用[J].电化学,2017,23(4):409-419,11.基金项目
This work was financially supported by grants from the National Natural Science Foundation of China (No.51422301),Beijing Higher Education Young Elite Teacher Project (No.29201493) and the Fundamental Research Funds for the Central Universities(No.YWF-16-BJ-Y-68). （No.51422301）
