Sodium tungstate as electrolyte additive to improve high-temperature performance of nickel–metal hydride batteries
Sodium tungstate as electrolyte additive to improve high-temperature performance of nickel–metal hydride batteries
复制标题
钨酸钠作为电解液添加剂改善镍氢电池高温性能
DOI:
10.1016/j.ijhydene.2013.02.047
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发表时间:
2013-04
影响因子:
7.2
通讯作者:
Haijiang Wang
中科院分区:
文献类型:
--
作者:
Enbo Shangguan;Jing Li;Zhaorong Chang;Hongwei Tang;Bao Li;Xiao-Zi Yuan;Haijiang Wang
Sodium tungstate (Na2WO4) used as new electrolyte additive to enhance the high-temperature performance of Nickel–metal hydride (Ni–MH) battery is investigated in this paper. The effects of Na2WO4on nickel hydroxide electrodes are investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and a charge/discharge test. It is found that the Ni–MH cell with the conventional KOH electrolyte containing 1 wt.% Na2WO4additive exhibits higher discharge retention and better cycling performance than the cell without Na2WO4additive at both 25 °C and 70 °C. These performance improvements are ascribed to the enhancement of oxygen evolution overvoltage and lower electrochemical impedance, as indicated by CV and EIS. The results suggest that the proposed approach be an effective way to improve the high temperature performance of Ni–MH batteries.
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通讯作者:
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