流动电池
膜
钒
Nafion公司
无机化学
氮化硼
氧化还原
法拉第效率
化学稳定性
热稳定性
选择性
化学工程
材料科学
化学
离子交换
电化学
有机化学
电极
离子
催化作用
物理化学
电解质
生物化学
工程类
作者
X. Michel Myures,S. Suresh,G. Arthanareeswaran
标识
DOI:10.1016/j.jpowsour.2023.233818
摘要
As an alternative to expensive Nafion membrane, SPEEK (Sulfonated Poly Ether Ether Ketone) membrane reinforced with hydroxylated boron nitride is investigated as a potential proton exchange membrane for vanadium redox flow battery (VRFB). SPEEK based hybrid membranes are characterized for their thermal, mechanical and chemical stability along with proton conductivity and vanadium permeability. The results reveal that the hydroxylated boron nitride enhances the physicochemical properties of SPEEK and shown to improve selectivity of ions (52.629 *103. S.cm−3.min) with better stability. The improved properties are attributed to hydrogen bond formation between hydroxyl moieties of born nitride and sulfonic acid group in SPEEK. Among the hybrid membrane, SPEEK reinforced with 0.05 wt % of hydroxylated boron nitride exhibits a higher coulombic efficiency of 93.6 % (91.8 % for Nafion), higher self-discharge time of 14.21 h (11.36 h for Nafion) in VRFB single cell performance study. Cyclic performance study in VRFB with hybrid membrane shows stable characteristics during 50 cycles and it reaffirms the structural, thermal and chemical stability of hybrid membranes. Thus, this study provides insight into replacing commercial Nafion with hydroxylated boron nitride reinforced SPEEK hybrid membrane for vanadium redox flow battery.
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