| 锂硫电池正极用硫碳复合材料的制备和电化学研究 |
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| 引用本文： | 吴锋,吴生先,陈人杰,陈实,王国庆.锂硫电池正极用硫碳复合材料的制备和电化学研究[J].北京理工大学学报,2009,29(8):737-741. |
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| 作者姓名： | 吴锋 吴生先 陈人杰 陈实 王国庆 |
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| 作者单位： | 北京理工大学,化工与环境学院环境科学工程北京重点实验室,北京,100081;北京理工大学,化工与环境学院环境科学工程北京重点实验室,北京,100081;北京理工大学,化工与环境学院环境科学工程北京重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目，国家重点基础研究发展计划资助项目 |
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| 摘 要： | 采用优化合成的高比表面积和多微孔结构的活性炭,通过加热的方法使单质硫升华并沉积到活性炭微孔中,得到锂硫电池正极用硫碳复合材料.通过X射线衍射、扫描电子显微镜和比表面积表征复合材料的结构、表面形貌和比表面特性.循环伏安测试表明,复合材料在2.05V和2.35V时存在两个还原峰,在2.4V时存在一个氧化峰.充放电循环实验表明,单质硫在100mA·g-1的电流密度下首次放电比容量高达1352.5mA·h·g-1,硫的利用率达到了80.9%,循环40周后比容量还保持在800.7mA·h·g-1,表现出良好的循环稳定性.
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| 关 键 词： | 单质硫 正极材料 活性炭 锂硫电池 |
| 收稿时间： | 1/8/2009 12:00:00 AM |
Preparation and Electrochemical Properties of Sulfur-Carbon Composite as Cathode Materials for the Lithium-Sulfur Batteries |
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| WU Feng,WU Sheng-xian,CHEN Ren-jie,CHEN Shi and WANG Guo-qing.Preparation and Electrochemical Properties of Sulfur-Carbon Composite as Cathode Materials for the Lithium-Sulfur Batteries[J].Journal of Beijing Institute of Technology(Natural Science Edition),2009,29(8):737-741. |
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| Authors: | WU Feng WU Sheng-xian CHEN Ren-jie CHEN Shi and WANG Guo-qing |
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| Institution: | WU Feng1,2,WU Sheng-xian1,CHEN Ren-jie1,CHEN Shi1,WANG Guo-qing1,2(1.School of Chemical Engineering , Environment,Beijing Key Laboratory of Environmental Science , Engineering,Beijing Institute of Technology,Beijing 100081,China,2.National Development Center for High Technology Green Material,China) |
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| Abstract: | Sulfur-carbon composites as cathode for lithium-sulfur battery have been synthesized by heating a mixture of elemental sulfur and activated carbon with high specific surface area and microporous structure.The physical structure performance is characterized by X-ray diffraction,scanning electron microscopy and specific surface area measurements.It show two reduction peaks at 2.05 V and 2.35 V,one oxidation peak at 2.4 V during cyclic voltammogram test.The charge-discharge experiment indicates that its initia... |
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| Keywords: | elemental sulfur cathode material activated carbon lithium-sulfur battery |
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