| 掺杂稀土元素对Ni(OH)2晶格的影响 |
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| 引用本文： | 杨书廷,陈改荣,尹艳红,贾俊华,陈红军,赵培正.掺杂稀土元素对Ni(OH)2晶格的影响[J].电源技术,2002,26(4):278-280. |
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| 作者姓名： | 杨书廷 陈改荣 尹艳红 贾俊华 陈红军 赵培正 |
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| 作者单位： | 1. 河南师范大学,化学与环境科学学院,河南,新乡,453002
2. 河南平源大学,化工系,河南,新乡,453002 |
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| 基金项目： | 国家自然科学基金资助项目 (2 9981 0 0 2 ) |
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| 摘 要： | 首次研究了掺杂稀土元素La、Nd对Ni(OH) 2 晶格的影响 ,通过掺入异种高价离子 ,改变了Ni(OH ) 2 的晶格常数 ,特别是c轴的增加 ,改善了材料的质子扩散性能 ,减少了电化学反应的阻力。另外 ,掺杂异价离子降低了Ni2 的局域能级 ,引入了大量的正缺陷。相对于未掺杂晶体 ,其OH-的数量增多 ,增大了质子扩散的几率 ,因而提高了材料的电化学性能。
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| 关 键 词： | 均匀络合共沉淀法 电极可逆性 比容量 |
| 文章编号： | 1002-087(2002)04-0278-03 |
| 修稿时间： | 2001年10月3日 |
Effect of doping rare-earth elements on the lattice of Ni(OH)2 |
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| YANG Shu ting ,CHEN Gai rong ,YIN Yan hong ,JIA Jun hua ,CHEN Hong jun ,ZHAO Pei zheng.Effect of doping rare-earth elements on the lattice of Ni(OH)2[J].Chinese Journal of Power Sources,2002,26(4):278-280. |
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| Authors: | YANG Shu ting CHEN Gai rong YIN Yan hong JIA Jun hua CHEN Hong jun ZHAO Pei zheng |
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| Affiliation: | YANG Shu ting 1,CHEN Gai rong 2,YIN Yan hong 1,JIA Jun hua 1,CHEN Hong jun 1,ZHAO Pei zheng 1 |
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| Abstract: | The effect of doping rare earth element La and Nd on the lattice of Ni(OH) 2 was researched for the first time. The results show that the lattice constant of Ni(OH) 2 is changed, expecially the c axis is increased by doping the ion with high valence. Therefore, the proton diffusion property of the material is improved and the resistance during electrochemical reaction is decreased. In addition, the local energy level of Ni 2 is decreased and large amount of positive defect is imported by the doping. The Ni(OH) 2 material doped with rare earth elements has more OH - amount and higher proton diffusion coefficient compared with the material without doping, so its electrochemical properties are improved. |
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| Keywords: | homogeneous complex co precipitation method reversibility of electrode specific capacity |
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