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Electrochemical performance of nano-scale β-Ni(OH)2 prepared at different transformations of pH value

ZHAO Li ZHANG Li-jun HAN Xi-jiang ZHANG Cui-fen

哈尔滨工业大学学报（英文版）2008，Vol.15Issue(2)：160-163,4.
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哈尔滨工业大学学报（英文版）2008，Vol.15Issue(2)：160-163,4.

Electrochemical performance of nano-scale β-Ni(OH)2 prepared at different transformations of pH value

Electrochemical performance of nano-scale β-Ni(OH)2 prepared at different transformations of pH value

ZHAO Li 1ZHANG Li-jun 2HAN Xi-jiang 3ZHANG Cui-fen2

作者信息

  • 1. Postdoctoral Station of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 2. Dept of Applied Chemistry,Harbin Institute of Technology, Harbin 150001, China
  • 3. Postdoctoral Work Station, Jiangsu Shuangdeng Group Co. Lid, Jiangyan 225526, China
  • 折叠

摘要

Abstract

The influence of transforming pH values on the electrochemical performance of nano-scale Ni(OH)2was analyzed. The measurement results of XRD indicate that the nano-scale Ni (OH)2 prepared at different transformations of pH value is β( Ⅱ )-phase with different crystal lattice parameters. Cyclic voltammograms (CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformations of pH value affect the proton diffusion coefficient (D) and charge-transfer resistance (Rct) of the material. The simu-lation of cell experiment shows that the sample prepared at a pH of 10. 1 exhibits the maximum specific capacity(327. 8 mAh/g) and higher discharge platform, the discharge performance of electrodes depends on both D and Rct, so the kinetics characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step are put forward.

关键词

nano-material/ Ni (OH)2/ electrochemical/ transformations of pH value

Key words

nano-material/ Ni (OH)2/ electrochemical/ transformations of pH value

分类

信息技术与安全科学

引用本文复制引用

ZHAO Li,ZHANG Li-jun,HAN Xi-jiang,ZHANG Cui-fen..Electrochemical performance of nano-scale β-Ni(OH)2 prepared at different transformations of pH value[J].哈尔滨工业大学学报（英文版）,2008,15(2):160-163,4.

基金项目

Sponsored by the National Natural Science Foundation of China (Grant No. 20271015 ). （Grant No. 20271015 ）

哈尔滨工业大学学报（英文版）

1005-9113

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