Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method

摘要：

The hydrotalcite-type cobalt compounds were prepared through oxidation of Co(OH)2 gel using NH4OH as precipitating agent and H2O2 as oxidant.These hydrotalcite-type cobalt compounds were transformed into Co3O4 through hydrothermal decomposition with nanostructural deformation.The precursor and product were characterized by Fourier-transform infrared(FT-IR) spectrum,X-ray diffractometry(XRD) and transmission electron microscopy(TEM).The electrochemical performances of as-prepared nanosized Co3O4 as anode materials in lithium-ion batteries were tested by charge-discharge test in the voltage range of 0.3.0 V.The influence of morphology of Co3O4 particle on the capacity and cycling performance was studied.The results show that the shape and size of the final product can be controlled by altering cobalt sources.The irregular cubic Co3O4 with the average particle size of about 10 nm shows the best electrochemical performance.After 10 charge-discharge cycles,the specific charge capacity retains 555 mA·h/g.

关键词： hydrotalcite-type cobalt compounds nanosized Co3O4 hydrothermal method anode materials

作者: YANG You-ping LIU Ren-sheng HUANG Ke-long WANG Li-ping LIU Su-qin ZENG Wen-wen

作者单位: School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）