Preparation of Spherical Ni(OH)_2 Coated with CoOOH and Its Fast Charge Performance

Authors

Min-jie YANG, 1),NAN Jun-min~(*1),HOU Xian-lu~(2),XUE Jian-jun~(2),CUI Yan~(3),CUI Ming~(1)(1.School of Chemistry and Environment,South China Normal University,Guangzhou,51006,Guangdong,China,2.Guangzhou Great Power Battery Co.,Ltd,Guangzhou 511483,Guangdong,China,3.School of Chemical Engineering and Technology,Tianjin University,Tianjin 30072,China;

Abstract

Spherical Ni(OH)_(2) was coated with CoOOH through chemical precipitation and electrolytic oxidation.The influences of CoOOH coating on fast charge performance ofMH/Ni battery were studied by preparing high capacity and fast charge AA size MH/Ni batteries.The sample coated with CoOOH was characterized by Infrared spectrum(IR) and scanning electron microscopy(SEM).The results showed that the internal resistance decreased 3.4 mΩ,the charge plateau lower and the cell temperrature was below 55 ℃ at the end of charging process when the cathode active material used Ni(OH)_2 coated with CoOOH as compared with that doped by CoO.In addition,an initial discharge efficiency of 90.6% and over 300 cycles lifetime were achieved when the batteries were fast charged.

Keywords

Spherical nickel hydroxide, Surface modification, CoOOH, Fast charge

DOI Link

https://doi.org/10.61558/2993-074X.1723

Publication Date

2006-05-28

Online Available Date

2006-05-28

Revised Date

2006-05-28

Received Date

2006-05-28

Recommended Citation

Min-jie YANG. Preparation of Spherical Ni(OH)_2 Coated with CoOOH and Its Fast Charge Performance[J]. Journal of Electrochemistry, 2006 , 12(2): 205-209.
DOI: 10.61558/2993-074X.1723
Available at: https://jelectrochem.xmu.edu.cn/journal/vol12/iss2/15