Electrochemical performance of α-nickel hydroxide codoped with La and Zn

LIU Changjiu; LI Peipei; ZHAO Weimin; HUANG Lianghua

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Electrochemical performance of α-nickel hydroxide codoped with La and Zn

更新时间：2025-12-10

- Electrochemical performance of α-nickel hydroxide codoped with La and Zn
- CIESC Journal Issue 10, Pages: 2743-2747(2010)
- 作者机构：
  
  桂林理工大学化学与生物工程学院，有色金属及材料加工新技术教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 October 2010，
  
  Published：05 October 2010
- 稿件说明：
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LIU Changjiu, LI Peipei, ZHAO Weimin, et al. Electrochemical performance of α-nickel hydroxide codoped with La and Zn[J]. CIESC Journal, 2010, (10): 2743-2747.
DOI：

LIU Changjiu, LI Peipei, ZHAO Weimin, et al. Electrochemical performance of α-nickel hydroxide codoped with La and Zn[J]. CIESC Journal, 2010, (10): 2743-2747. DOI：

摘要

采用尿素均相沉淀法制备出稀土La和Zn复合掺杂α-Ni(OH)2样品材料，同时采用XRD、EDS、IR和TG-DSC热分析技术对样品的微结构和组成进行了测试，并研究了样品作为MH-Ni电池正极活性材料的电化学性能。结果表明，稀土La和Zn复合掺杂α-Ni(OH)2材料具有较大的晶格间距，其含有更多的结构H2O分子，电极反应的电荷转移电阻较低;样品材料电极在以0.1 C充放，终止电压1.0 V的制度下，其放电比容量高达372.85 mAh·g-1，同时放电中值电压较高并稳定于1.30 V，1 C下其放电比容量高达344.07 mAh·g-1，充放电循环30次容量保持率为93.04%，显示出良好的较大倍率放电性能和循环可逆及结构稳定性能。

Abstract

The rare metal La and Zn codoped α-nickel hydroxide was prepared by the urea precipitation method.The microstructure and composition of the sample were characterized by XRD

EDS

IR and TG-DSC.The electrochemical properties were also investigated when the sample codoped with La and Zn was made as the nickel electrode active material

and the MH-Ni battery was assembled.The results showed that the sample had a relatively larger interlayer distance and contained many structurally bonded water molecules

and the electrochemical reaction impedance was reduced.At 0.1 C charge-discharge rate

the discharge specific capacity reached 372.85 mAh·g-1 when the end potential was 1.0 V

simultaneously its discharge mediate potential was higher and maintained at 1.30 V.In addition

the discharge specific capacity of the sample could reach 344.07 mAh·g-1 at 1 C rate

and the capacity still remained 93.04% of the sample after 30 cycles.It demonstrated better high-rate discharge performance

and increased cycling and structural stability.

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