| 多壁碳纳米管对单质硫正极材料电化学性能的改性 |
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| 引用本文： | 吴锋,吴生先,陈人杰,陈实,王国庆.多壁碳纳米管对单质硫正极材料电化学性能的改性[J].新型炭材料,2010,25(6). |
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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： | 1. 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;国家高技术绿色材料发展中心,北京,100081
2. 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： | 国家重点基础研究发展计划项目(2002CB211800,2009CB220100); 国家自然科学基金(20803042)~~ |
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| 摘 要： | 为增强单质硫电极的导电性能和抑制活性硫在电解液中的溶解,选用高比表面积、强吸附能力的多壁碳纳米管作为非活性添加剂,通过密封分段加热的方式与单质硫形成复合材料。X射线衍射(XRD)、扫描电子显微镜(SEM)和比表面积(BET)测试均表明单质硫均匀分散到碳纳米管基体中。电化学测试显示添加碳纳米管的硫电极首次放电比容量高达1 487.0mAh.g-1,硫的利用率达到了88.9%,循环50次后比容量还保持在913.7mAh.g-1,较之普通硫电极其电化学性能得到显著改善。
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| 关 键 词： | 多壁碳纳米管 单质硫 正极材料 锂硫电池 |
Improvement of the electrochemical properties of sulfur cathode materials with multiwalled carbon nanotubes |
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| WU Feng,WU Sheng-xian,CHEN Ren-jie,CHEN Shi,WANG Guo-qing.Improvement of the electrochemical properties of sulfur cathode materials with multiwalled carbon nanotubes[J].New Carbon Materials,2010,25(6). |
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| Authors: | WU Feng WU Sheng-xian CHEN Ren-jie CHEN Shi WANG Guo-qing |
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| Affiliation: | WU Feng1,2,WU Sheng-xian1,CHEN Ren-jie1,CHEN Shi1,WANG Guo-qing1,2(1.School of Chemical Engineering and Environment,Beijing Key Laboratory of Environmental Science and Engineering,Beijing Institute of Technology,Beijing100081,China,2.National Development Center for High Technology Green Material,China) |
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| Abstract: | In order to improve electronic conductivity and prevent dissolution of sulfur into the electrolyte,composite materials based on elemental sulfur and multiwalled carbon nanotubes(MWCNTs) with high specific surface area and strong absorbability as an inactive additive were prepared by a completely airtight step-wise heat synthesis method.X-ray diffraction,scanning electron microscopy and specific surface area measurements all indicated that elemental sulfur was distributed evenly throughout the MWCNTs.The ele... |
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| Keywords: | Multiwalled carbon nanotubes Elemental sulfur Cathode material Lithium-sulfur battery |
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