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Mg_2Ni+Ni型贮氢合金相形成及电化学性能 被引量:1

Phase formation and electrochemical performance of Mg_2Ni+Ni typed hydrogen storage alloy
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摘要 采用压制烧结和随后机械合金化的方法制备了Mg2Ni+Ni型电极合金。研究了Al、Mn替代Mg后对Mg2Ni+Ni型合金相形成及电化学性能的影响。XRD测试显示:各合金在610~620℃经过5h烧结后的相结构大部分为Mg2Ni相,与Ni粉混合球磨72h后全部转变为均匀的非晶相。电化学性能测试结果表明:Al、Mn替代后再与Ni粉球磨后的合金,其放电容量、高倍率性能较Mg2Ni+Ni合金均有显著提高,其中Mg1.8Al0.15Mn0.05Ni+Ni合金的综合性能最佳。 Mg2Ni+Ni alloy powder was prepared by sintering and subsequently ball milling. Effects of the partial substitution of Al and Mn for Mg on the phase formation and electrochemical performance of Mg2Ni+Ni typed alloys were researched. The XRD results show that all alloy phases are mainly Mg2Ni after sintering for 5 h at 610-620 ℃, and their phases are uniform amorphous structure after mechanical grinding with Ni powder for 72 h. The electrochemical tests results show that the discharge capacity and highrate dischargeability of the alloys with the partial substitution of Al and Mn for Mg and the subsequently ball milling with Ni powder were significantly improved compared with that of Mg2Ni+Ni alloy. Over all, the Mg1.8Al0.15Mn0.05Ni+Ni alloy shows the best integrated properties.
出处 《电源技术》 CAS CSCD 北大核心 2003年第B05期148-150,共3页 Chinese Journal of Power Sources
基金 教育部博士点基金资助项目(20010151001)
关键词 MH-NI电池 Mg2Ni+Ni型贮氢合金 相结构 电化学性能 电极合金 Ni-MH battery hydrogen storage alloy Mg_2Oi+Ni typed alloy phase structure electrochemical property cycling stability
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参考文献11

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同被引文献8

  • 1LIAO B, LEI Y Q, CHEN L X, et al. Effect of the La/Mg ratio on the structure and electrochemical properties of Lax Mg3.xNi9 (x = 1.6 ~2.2) hydrogen storage electrode alloys for nickel-metal hydride batteries[J].J Power Sources, 2004,129: 358-367.
  • 2CARINE R, LIONEL R. Effect of particle size on the electrode performance of MgNi hydrogen storage alloy[J].J Power Sources, 2004,132: 302-308.
  • 3STE'PHANE R, LIONEL R. Correlation between charge input and cycle life of MgNi electrode for Ni - MH batteries [J].J Power Sources,2003, 117: 260-266.
  • 4PASTUREL M, BOBET J L, CHEVALIER B.Various ways includ ing substitution and protection used to improve the cyclability of 'MgNi' electrodes[J].J Alloys Comp,2003,356-357: 764-767.
  • 5BORISLAV B, RICHARD A B.Metal-deoped sodium aluminium hydrides as potential new hydrogen storage materials [J].J Alloys Comp,2000,302: 36-58.
  • 6张智力,李茂德.几种汽车替代燃料的技术经济比较[J].能源研究与信息,2002,18(2):80-85. 被引量:15
  • 7毛宗强.氢能离我们还有多远——我国燃料电池现状、差距及对策[J].电源技术,2003,27(B05):179-182. 被引量:17
  • 8王权,季世军,孙俊才.镁基非晶贮氢电极合金的研究现状与展望[J].电源技术,2004,28(1):51-55. 被引量:2

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