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High Temperature Performances of Spherical Nickel Hydroxide with Additive Y2O3

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【作者】 米欣； 叶茂； 阎杰； 魏进平； 高学平；

【Author】 Mi Xin , Ye Mao , Yan Jie ~, Wei Jingping , Gao Xueping (Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China)

【机构】 Institute of New Energy Material Chemistry； Nankai University； Tianjin 300071； China； China；

【Abstract】 The effect of Y2O3 as additive to the positive electrode on the high-temperature performances of the Ni-MH batteries was studied. The specific capacities of the positive electrode in Ni-MH battery at higher temperatures are much lower than usual. In order to improve high-temperature performances, charge/discharge curves of the Ni（OH）2 electrodes with different amounts of Y2O3 at different temperatures were studied. It is found that the specific capacities of the spherical Ni（OH）2 with Y2O3 as additive are much higher than those of the regular at higher temperatures. The specific capacity of Ni（OH）2 containing 1% Y2O3 at 0.2C C/D rate is 35% higher than that of the regular. The specific capacity of Ni（OH）2 containing 0.2% Y2O3 at 1C C/D rate is 15% higher than that of the regular. Mechanism of Y2O3 improving high temperature performances of Ni（OH）2 electrode was also discussed in detail.

【关键词】 energy materials； Y2O3； spherical Ni（OH）2； high temperature performance； discharge capacity； rare earths；
【Key words】 energy materials； Y2O3； spherical Ni（OH）2； high temperature performance； discharge capacity； rare earths；
【基金】 ProjectsupportedbytheNationalNaturalScienceFoundationofChina ( 5 0 13 40 2 0 )and 973 ProgramsofChina( 2 0 0 2CB2 1180 0 )
  • 【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2004年03期
  • 【分类号】TM912.2
  • 【被引频次】2
  • 【下载频次】34
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