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研究论文

稀土氧化物对二次锌电极性能的影响

  • 孟宪玲 ,
  • 杨化滨 ,
  • 王军红 ,
  • 周作祥
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  • 南开大学新能源材料化学研究所,南开大学新能源材料化学研究所,南开大学新能源材料化学研究所,南开大学新能源材料化学研究所 天津300071 ,天津300071 ,天津300071 ,天津300071

收稿日期: 2005-02-28

  修回日期: 2005-02-28

  网络出版日期: 2005-02-28

Influence of Rare Earth Oxide on the Performance of Secondary Zinc Electrodes

  • MENG Xian-ling ,
  • YANG Hua-bin~ ,
  • WANG Jun-hong ,
  • ZHOU Zuo-xiang
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  • (Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China

Received date: 2005-02-28

  Revised date: 2005-02-28

  Online published: 2005-02-28

摘要

应用阴极极化法在锌电极上覆盖一层稀土氢氧化物膜La(OH)3或Ce(OH)3,并用循环伏安、动电位极化、定电位阴极极化实验研究其电化学性能.结果表明,La(OH)3或Ce(OH)3膜能抑制锌酸根离子的迁移,提高析氢过电位,降低腐蚀电流密度并能抑制枝晶生长.SEM观测显示,稀土氧化物La2O3或CeO2改变了锌沉积形态,进而提高了锌酸钙电极的充放电循环性能.

本文引用格式

孟宪玲 , 杨化滨 , 王军红 , 周作祥 . 稀土氧化物对二次锌电极性能的影响[J]. 电化学, 2005 , 11(1) : 58 -61 . DOI: 10.61558/2993-074X.1614

Abstract

Influence of La(OH)_(3 )or Ce(OH)_3in secondary zinc electrode was investigated by the cyclic voltammetry, potentiodynamic polarizationand potentiostatic polarization tests and influence of La_2O_3or CeO_2in the charge/discharge performance of Zn/Ni battery was studied by galvanostatic charge/discharge experiment. The results showed that the film of rare earth hydroxide prevented the zincate species from transferring toward solution, enhanced hydrogen overpotential and decreased thecorrosion current density (i_(corr)), and therefore inhibited zinc corrosion. The potentiostatic polarization results at100mV overpotential showed thatLa(OH)_3or Ce(OH)_3coated on the zinc electrode effectively suppressed the zinc dendrite growth. The La_2O_(3 )or CeO_2addition to the calcium zincate electrode improved the cycle performance of Zn/Ni battery.

参考文献

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