Hydrogen-Vanadium Reversible Fuel Cell Crossover Study
Hydrogen-Vanadium Reversible Fuel Cell Crossover Study
复制标题
氢-钒可逆燃料电池交叉研究
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. Dowd
中科院分区：
文献类型：
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作者：
R. Dowd
在钒基氧化还原低电压电池系统中，钒离子穿过离子交换膜导致自放电和电解质浓度的变化。VO + 2和VO + 2通过各种Na Fion膜的交叉率或渗透率直接用氢钒可逆燃料电池测量。与理想化的双室系统相比，直接用燃料电池测量电解质物质的交叉允许在实际燃料电池测试条件下确定渗透性。这种新的原位技术测量VO + 2和VO + 2交叉与燃料电池被证明是可靠的，易于使用。交叉测量方法显示，使用较薄的离子交换膜时交叉率增加。电纺共混纳米纤维膜也被制造并在氢钒可逆燃料电池中进行测试，与商用Na F ion膜相比，其交叉率更低，燃料电池性能更高。
Vanadium crossover through the ion exchange membrane in vanadium-based redox flow battery systems results in self discharge and variations in electrolyte concentration. VO + 2 and VO + 2 crossover rate, or permeability, through various Nafion membranes was measured directly with a hydrogen-vanadium reversible fuel cell. Measuring crossover of electrolyte species directly with a fuel cell, as compared to an idealized dual-chamber system, allows for determining permeability under actual fuel cell testing conditions. This new in-situ technique for measuring VO + 2 and VO + 2 crossover with a fuel cell is shown to be reliable and easy to use. The crossover measurement method shows increased crossover rates with thinner ion exchange membranes. Electrospun blended nanofiber membranes were also fabricated and tested in the hydrogen-vanadium reversible fuel cell leading to lower crossover rates and high fuel cell performance, as compared to commercial Nafion films.