MICROSTRUCTURE AND ELECTROCHEMICAL CHARACTERISTICS OF Zr0.9 Ti0.1(Ni1.1Mn0.7V0.2)x METAL HYDRIDE ELECTRODE

金属学报(英文版), 2003, 16(3): 192-196.

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1.Department of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao,066004,China;Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun,130022, China

2.Department of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao,066004,China;Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun,130022, China

3.Department of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao,066004,China

基金项目: 中国科学院资助项目国家自然科学基金(20171042)

MICROSTRUCTURE AND ELECTROCHEMICAL CHARACTERISTICS OF Zr0.9 Ti0.1(Ni1.1Mn0.7V0.2)x METAL HYDRIDE ELECTRODE

Keywords： metal hydride electrode

The crystal structure, the phase composition and the electrochemical characteristics of Zr0.9 Ti0.1 (Ni1.1 Mn0.7 V0.2)x (x=0.90, 0.95, 1.00, 1.05) alloys were investigated by means of XRD, SEM, EDS and electrochemical measurements. It was shown that all alloys are multiphase with C15 Laves phase as a main phase along with C14phase and some secondary phases. And the amounts of the C14 phase and secondary phases in the four alloys increases with decreasing x. The results indicated that the various stoichiometric ratios have great effects on the electrochemical characteristics such as the maximum discharge capacity, discharge rate capability and self-discharge properties etc. for Zr0.9 Ti0.1 (Ni1.1 Mn0.7 V0.2)x (x=0.90, 0.95, 1.00, 1.05) alloys. The hyper- stoichiometric Zr0.9 Ti0.1 (Ni1.1 Mn0.7 V0.20)1.05 exhibits the maximum discharge capacity of 332mAh. g-1. The C14 phase and secondary phases seems to improve discharge rate capability of the alloys.

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MICROSTRUCTURE AND ELECTROCHEMICAL CHARACTERISTICS OF Zr0.9 Ti0.1(Ni1.1Mn0.7V0.2)x METAL HYDRIDE ELECTRODE

参考文献