稀土氧化物对二次锌电极性能的影响

电化学（中英文） ›› 2005, Vol. 11 ›› Issue (1): 58-61.

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

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 出版日期:2005-02-28 发布日期: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

(Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071,China

Received:2005-02-28 Revised:2005-02-28 Published:2005-02-28 Online:2005-02-28

摘要/Abstract

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.

关键词: 二次锌电极, La(OH)3或Ce(OH)3膜, La2O3或CeO2

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.

Key words: Secondary zinc electrode, La(OH)_3or Ce(OH)_3, La_2O_3or CeO_2

中图分类号:

TM911

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（中英文）, 2005, 11(1): 58-61.

MENG Xian-ling, YANG Hua-bin~*, WANG Jun-hong, ZHOU Zuo-xiang. Influence of Rare Earth Oxide on the Performance of Secondary Zinc Electrodes[J]. Journal of Electrochemistry, 2005, 11(1): 58-61.

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