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Study of co-ce coating and surface on pasted nickel electrodes substrate

Rare Metals 2006年第Z1期25卷 47-50页

作者： WANG Dianlong WANG Chunyu DAI Changsong SUN Dezhi Post Doctor Workstation of Environmental Protection Technology corporation Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Post Doctor Workstation of Environmental Protection Technology Corporation Harbin Institute of Technology Harbin 150001 China

The process of electroplating co-ce alloys on the nickel foam framework surface can improve electro-conductivity for active materials and nickel substrate interface. The results of inductive coupled plasma emission spectrometer (ICP), cyclic voltammetry (CV), scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron probe microanalysis (EPMA) indicate that the co-ce coating chemical content of rare earth ce 0.19wt.%-0.28wt.% can not only alter the microstructure of electroplating coating, but also accelerate the oxidation reaction of co and improve its transfer rate of electric current conductivity to the active material particles. The grads-like distributing electro-conductive network of coOOH is formed on the nickel substrate surface, which improves reversibility of pasted nickel electrode. The charging receptivity is improved by co-ce coating on the pasted nickel electrode substrate, and its specific discharging capacity is improved by 50%.