Nickel foam and carbon felt applications for sodium polysulfide/bromine redox flow battery electrodes
Nickel foam and carbon felt applications for sodium polysulfide/bromine redox flow battery electrodes
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DOI：
10.1016/j.electacta.2005.06.008
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发表时间：
2005-11
影响因子：
6.6
通讯作者：
Ping Zhao;Huamin Zhang;Hantao Zhou;B. Yi
中科院分区：
文献类型：
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作者：
Ping Zhao;Huamin Zhang;Hantao Zhou;B. Yi
描述了泡沫镍 (NF) 在多硫化物/溴电池 (PSB) 中作为电催化负电极的首次应用。通过单电池恒流充放电测试评估分别采用NF和聚丙烯腈（PAN）基碳毡（CF）作为负极材料和正极材料的PSB的性能。电池、正负极的充放电曲线表明，电池电压快速下降是由于放电末期阴极电解液中溶解的Br2耗尽导致正电位下降所致。电池电压效率受到相对较高的内部欧姆电阻降（iR 降）的限制。极化曲线表明NF和CF对PSB的正负氧化还原反应均具有优异的催化活性。这项工作设计的单电池在 40mAcm−2 电流下经过 48 个充放电循环后的平均能效高达 77.2%。
The first use of nickel foam (NF) as electrocatalytic negative electrode in a polysulfide/bromine battery (PSB) is described. The performance of a PSB employing NF and polyacrylonitrile (PAN)-based carbon felt (CF) as negative and positive electrode materials, respectively, was evaluated by constant current charge-discharge tests in a single cell. Charge/discharge curves of the cell, positive and negative electrodes show that the rapid fall in cell voltage is due to the drop of positive potential caused by depletion of Br2dissolved in the catholyte at the end of discharge. Cell voltage efficiency was limited by the relatively high internal ohmic resistance drop (iR drop). Polarization curves indicated that both NF and CF have excellent catalytic activity for the positive and negative redox reactions of PSB. The average energy efficiency of the single cell designed in this work could be as high as 77.2% at 40mAcm−2during 48 charge-discharge cycles.