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Citation: DING Chun-Tao, MO Xiang-Yin, WANG Ke-Yu, SHEN Jian. Preparation and Characterization of Battery Grade Co₃O₄[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 543-547. shu

Preparation and Characterization of Battery Grade Co₃O₄

DING Chun-Tao ^a,b ,
MO Xiang-Yin ^a,c,, ,
WANG Ke-Yu ^a ,
SHEN Jian ^c,d

1.
a Analysis and Testing Center & Materials Scinence Laboratory, Nanjing Normal University, Nanjing 210097;
2.
b SINOPEC Nanjing Chemical Industrial Co., Ltd. Nanjing;
3.
c Jiangsu Engineering Research Center for Biomedical Function Materials, Nanjing Normal University, Nanjing 210097;
4.
d Jiangsu Technological Research Center for Interfacial Chemistry and Chemical Engineering, Nanjing University, Nanjing

Corresponding author: MO Xiang-Yin,
Received Date: 8 June 2007
Available Online: 5 August 2007
Fund Project: 教育部留学回国人员科研启动基金(2004832061) (2004832061)南京师范大学留学回国人员科研启动基金(2006191XLH0132) (2006191XLH0132)江苏省自然科学基金(2005CCA004,BK2007600)资助项目 (2005CCA004,BK2007600)

The battery grade Co₃O₄ was prepared from CoCl₂·6H₂O and NH₄HCO₃ by means of precipitation and calcination.Systemic studies were conducted on the effects of pH of the solution,reaction time and temperature,the adding ratio of raw materials during the reaction process,and the calcination period and temperature of the precursor basic cobalt carbonate.The best preparation way was thus found.The precursor basic cobalt carbonate was made from the reaction between CoCl₂·6H₂O and NH₄HCO₃ with the molar ratio of 1:2.5,at 80℃ or so and pH 8~9 for 20 minutes.Then,the precursor basic cobalt carbonate was washed with de-ionized water,dried by heating or air flowing at a temperature less than 100℃,and baked at a temperature from 600 to 820℃ for about 8 h.Thus,the pure Co₃O₄ was made.Co₃O₄ powder characterization was analyzed by ICP-AES,XRD,SEM/EDS,FT-IR,LGA,and TG/DSC.It was found by the characterization study that the Co₃O₄ powder was at particle size ranging from 4~10 μm,average grain size of 7.3 μm,and specific area of 1.05 m²/g.The powder showed a narrow distribution of particle size,and was polyhedral and sphereoidal,and met the requirement of the battery grade Co₃O₄.
- battery grade Co₃O₄,
- cathode material,
- precipitation and calcination method,
- characterization
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Preparation and Characterization of Battery Grade Co₃O₄