Corresponding Author

Tong-chi XIA


The chemical cobalt plating method is used to treat on the hydrogen storage alloys.Effect of the surface treatment on the electrochemical performance of MH eletrodes was investigated by carrying out experimental methods of CV,AC and charge/discharge cycle tests. The results showed that after microencapsulation with cobalt, the impedance of electrochemical reaction on the surface and polarization during chare/discharge process was markedly decreased; and the electrocatalytic activity on the surface, discharge capacity,charge efficiency was improved. It was also indicated that the anode reaction of MH electrode treated was controlled by diffusion process.


Hydrogen strage alloys, Chemical cobalt microencapsulating, Electrochemical impedance spectra, Cyclic voltammetry

Publication Date


Online Available Date


Revised Date


Received Date



[1] YuCheng zhou,LaiWei hua.CurrentstiuationanddevelopmentdirectionofMH/Nibattery[J].Battery,2001,31(2):58.
[2] BalsS.Haran,BrankoNP,RalphEW.Studiesonelectrolesscobaltcoatingsformicroencapsulationofhydrogenstoragealloys[J].J.Electrochem.Soc.1998,145(9):3000.
[3] XiaXi.ThefiftyyearsofchemicalpowersourcesinChina(Ш)[J].BatteryBimonthly,2000.30(5):192.
[4] ChenWen xiang,ChenYun,PanHong geetal.Surfacefreatmentsofhydrogenstoragealloycharge dischargeperformancesofNi/MHbattery[J].ActaPhysico chimicaSinica,1998.14(8):742.
[5] Sunchun men,GuoHe tong,TangZhi yuan.Surfacetrestmentofhydrogenstoragealloys[J].ChineseRareEarths,1999,20(8):57.
[6] ChenWei xiang.Strudyoncyclicvoltammetryandelectrochemicalimpedanceofhydrogenstoragealloyelectrode[J].ChineseJournalofPowerSources,2000,24(4):200.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.