电解质的改性对稀土合金电化学性能的影响

Effect of electrolyte modification on electrochemical properties of rare earth alloy

为了改善氢镍电池用稀土储氢合金的电化学性能,研究了电解质改性对La_(0.7)Mg_(0.3)Ni_(3.5)合金电极电化学性能的影响。在6 mol/L的KOH原电解液中分别添加适量LiOH、NaOH、Cu(OH)_2后,电极的最大放电比容量和活化性能没有太大的变化,但电极的容量保持率和高倍率放电性能都有明显提高。

In order to improve the electrochemical properties of rare earth hydrogen storage alloy electrodes of nickel/metal hydride（Ni/MH） batteries,the effects of electrolyte modification on the electrochemical properties of the La_（0.7）Mg_（0.3）Ni_（3.5） alloy electrodes were systematically investigated. Some LiOH, NaOH or Cu（OH）_2 were added into 6mol/L KOH electrolyte. In modified electrolyte, the capacity retention and high-rate dischargeability（HRD） of the alloy electrode are obviously improved while the maximum discharge capacity and activation behavior of the alloy electrode have little change.