【摘要】 用恒电流充放电和循环伏安方法研究了含Ce和Y的混合添加剂对镍电极和MH-N i电池高温电化学性能的影响,循环后的N i(OH)2粉末经XRD测试为β型.恒电流充放电结果表明,在高温下含有添加剂的MH-N i电池的库仑效率明显高于不含添加剂的MH-N i电池.镍电极的循环伏安实验表明,在高温条件下,在阳极区内不含添加剂的镍电极的N i(OH)2氧化峰与析氧峰重叠在一起,而含有添加剂的镍电极上N i(OH)2的氧化峰和析氧峰峰值电压差明显增加,镍电极和MH-N i电池在高温下的充放电性能明显提高.更多还原

【Abstract】 The effect of a mixed additive with Ce and Y elements on the electrochemical properties of（Ni（OH）₂） electrode and Ni-MH battery at high temperature has been investigated using the constant current charge/discharge and cyclic voltammogram（CV） measurements.The results of Xray diffraction showed that the active material after cycling is β-Ni（OH）₂.The experiment results showed that the mixed additive could improve the coulomb efficiency of NiMH battery at high temperature.And the additive markedly decreased the oxide potential of Ni（OH）₂ electrode and increased the potential difference between the oxygen evolution reaction and the oxidation of Ni（OH）₂ electrode at high temperature.And the discharge capacities of the battery with mixed additive are significantly improved at high temperature.更多还原