CAJ | 학술논문

采用电镀锌的方法对贮氢合金电极进行了表面处理．利用扫描电镜（SEM）、循环伏安、电化学阻抗等方法研究了镀锌层对贮氢合金电极表面形貌和电化学性能的影响，通过恒流充放电实验研究了其对氢镍电池充放电性能的影响．实验结果表明，贮氢合金表面镀锌后，加快了电极表面电子转移步骤的速度，降低了接触电阻，从而减小了电极的极化，使得电池充电电压降低，1C放电容量提高了15．3％，放电平台电压提高了22 mV，明显改善了电池的充放电性能．
채용전도자적방법대저경합금전겁진행료표면처리．이용소묘전경（SEM）、순배복안、전화학조항등방법연구료도자층대저경합금전겁표면형모화전화학성능적영향，통과항류충방전실험연구료기대경얼전지충방전성능적영향．실험결과표명，저경합금표면도자후，가쾌료전겁표면전자전이보취적속도，강저료접촉전조，종이감소료전겁적겁화，사득전지충전전압강저，1C방전용량제고료15．3％，방전평태전압제고료22 mV，명현개선료전지적충방전성능．
Zinc electrodeposition was introduced on the surface of hydrogen absorbing alloy electrodes.The morphology and electrochemical properties of the electrodes were characterized by using scanning electronic microscope (SEM),cyclic voltammetry,electrochemical impedance spectroscopy (EIS)and galvanostatic charge-discharge tests.The results showed that after zinc electrodeposition,the electron transfer rate on the surface of the electrodes was accelerated and the contact resistance decreased,thus resulting in a polariza-tion reduction of the electrodes.Furthermore,after zinc electrodeposition,the charge voltage of the batteries decreased,the discharge capacity at 1 C rate increased by 15.3% and the discharge plateau voltage in-creased 22 mV,the charge-discharge property was improved obviously.