Porous glass membranes for vanadium redox-flow battery application - Effect of pore size on the performance
Porous glass membranes for vanadium redox-flow battery application - Effect of pore size on the performance
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DOI：
10.1016/j.jpowsour.2017.12.001
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发表时间：
2018-02
影响因子：
9.2
通讯作者：
H. Mögelin;G. Yao;H. Zhong;A. R. Santos;A. Barascu;Ralf Meyer;S. Krenkel;Susan Wassersleben;T. Hickmann;D. Enke;T. Turek;U. Kunz
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文献类型：
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作者：
H. Mögelin;G. Yao;H. Zhong;A. R. Santos;A. Barascu;Ralf Meyer;S. Krenkel;Susan Wassersleben;T. Hickmann;D. Enke;T. Turek;U. Kunz
氧化还原液流电池的改进需要开发化学稳定且高导电性的隔膜。多孔玻璃膜可以是当今最常见的聚合物膜的有吸引力的替代品。为此，使用了孔径在2至50 nm范围内、厚度为300和500 μm的平板多孔玻璃膜。在电流密度为20 - 60 mA cm-2时，电压效率最高可达85.1%，库仑效率最高可达97.9%，能量效率最高可达76.3%。在电流密度为140 mA cm-2时，最大功率密度为95.2 mW cm-2。这些结果可以与小的钒交叉，高电导率和化学稳定性有关，证实了多孔玻璃膜用于钒氧化还原流动应用的巨大潜力。
The improvement of redox-flow batteries requires the development of chemically stable and highly conductive separators. Porous glass membranes can be an attractive alternative to the nowadays most common polymeric membranes. Flat porous glass membranes with a pore size in the range from 2 to 50 nm and a thickness of 300 and 500 μm have been used for that purpose. Maximum values for voltage efficiency of 85.1%, coulombic efficiency of 97.9% and energy efficiency of 76.3% at current densities in the range from 20 to 60 mA cm−2have been achieved. Furthermore, a maximum power density of 95.2 mW cm−2at a current density of 140 mA cm−2was gained. These results can be related to small vanadium crossover, high conductivity and chemical stability, confirming the great potential of porous glass membranes for vanadium redox-flow applications.