| Physical and Electrochemical Characterization of Hydrothermal Prepared α'-NaV_2O_5 Crystals |
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| 作者单位： | College of Physics,State Key Laboratory of Superhard Materials,Jilin University,Changchun 130012,P.R.China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.50672031);;the Foundation of Science and Technology Department of Jilin Province,China(No.20075007) |
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| 摘 要： | α'-NaV2O5 was prepared by a simple hydrothermal process.X-ray diffraction confirmed the orthorhombic structure of α'-NaV2O5,with preferential growth along the (001) direction.Scanning electron microscopy showed α'-NaV2O5 was composed of flake-shaped crystals.X-ray photoelectron spectroscopy confirmed the co-existence of V4+ and V5+ in α'-NaV2O5,which results in an average V4.5+ oxidation state of α'-NaV2O5.The observed Raman bands are ascribed to different V―O vibrations.α'-NaV2O5 shows a reversible specific capacity of about 100 mA·h·g-1 between 3.5 and 1.0 V,with a good capacity retention.The good electrochemical stability of the material is attributed to its structural stability during Li+ intercalation.
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| 关 键 词： | 电化学稳定性 水热法 制备 X射线光电子能谱 物理 表征 晶体 射线衍射分析 |
Physical and Electrochemical Characterization of Hydrothermal Prepared α'-NaV_2O_5 Crystals |
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| HU Fang WEI Ying-jin JIANG Tao MING Xing CHEN Gang WANG Chun-zhong. Physical and Electrochemical Characterization of Hydrothermal Prepared α'-NaV_2O_5 Crystals[J]. Chemical Research in Chinese University, 2010, 26(2): 291-293 |
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| Authors: | HU Fang WEI Ying-jin JIANG Tao MING Xing CHEN Gang WANG Chun-zhong |
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| Affiliation: | College of Physics, State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P. R. China |
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| Abstract: | |
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| Keywords: | Lithium ion battery Vanadium bronze Electrochemical performance |
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