| 介孔结构磷酸钛正极材料的制备及其电化学性能 |
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| 引用本文： | 王琼. 介孔结构磷酸钛正极材料的制备及其电化学性能[J]. 化学研究, 2009, 20(4): 34-37,43 |
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| 作者姓名： | 王琼 |
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| 作者单位： | 湖南科技学院,生命科学与化学工程系,湖南,永州,425100 |
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| 基金项目： | 湖南省自然科学基金项目，湖南省教育厅重点科研项目，湖南省重点学科建设项目 |
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| 摘 要： | 利用溶胶凝胶模板法结合煅烧的方法,通过外加和不加模板剂,分别制备出介孔结构和非介孔结构的磷酸钛正极材料,所得样品的结构和比表面积分别用X射线粉末衍射仪和低温N2吸脱附技术进行了表征,并对其电化学行为进行了研究.充放电测试结果表明,介孔结构的磷酸钛正极材料表现出优越的电化学性能,在500mA/g充放电条件下,首次放电容量高达81.9 mAh/g,而非介孔结构的磷酸钛正极材料的首次放电容量仅为11.4 mAh/g.
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| 关 键 词： | 介孔结构 磷酸钛 正极材料 电化学性能 |
Preparation and Electrochemical Performance of Titanium Phosphate with Mesoporous Structure |
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| WANG Qiong. Preparation and Electrochemical Performance of Titanium Phosphate with Mesoporous Structure[J]. Chemical Research, 2009, 20(4): 34-37,43 |
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| Authors: | WANG Qiong |
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| Affiliation: | WANG Qiong ( Department of Chemistry , Hunan University of Science and Engineering, Yongzhou 425100, Hunan, China) |
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| Abstract: | Mesoporous and nonmesoporous titanium phosphate materials were prepared by using sol-gel template method and sol-gel method,combined with calcination method.Their structures were characterized by using small angle X-ray diffraction,large angle X-ray diffraction and N2 adsorption/desorption techniques.Their electrochemical performance was investigated.It was found that the mesoporous material showed good electrochemical performance.The first discharge capacity of the mesoporous material is 81.9 mAh/g at a current density of 500 mA/g,while that of the nonmesoporous material is only 11.4 mAh/g under the same charge-discharge condition. |
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| Keywords: | mesoporous structure titanium phosphate cathode material electrochemical performance |
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