| Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method |
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| 作者姓名： | 杨幼平 刘人生 黄可龙 王丽平 刘素琴 曾雯雯 |
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| 作者单位： | School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | 国家自然科学基金;中南林业科技大学校科研和教改项目 |
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| 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.
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| 关 键 词： | 钴化合物 纳米材料 热液 阳极材料 |
| 收稿时间： | 15 July 2007 |
| 修稿时间： | 2007-07-15 |
Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method |
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| You-ping YANG, Ren-sheng LIU, Ke-long HUANG, Li-ping WANG, Su-qin LIU,Wen-wen ZENG.Preparation and electrochemical performance of nanosized Co3O4 via hydrothermal method[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1334-1338. |
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| Authors: | You-ping YANG Ren-sheng LIU Ke-long HUANG Li-ping WANG Su-qin LIU Wen-wen ZENG |
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| Affiliation: | School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The hydrotalcite-type cobalt compounds were prepared through oxidation of Co(OH)2 gel using NH3O4 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. |
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| Keywords: | hydrotalcite-type cobalt compounds nanosized Co3O4 hydrothermal method anode materials |
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