| 碳纳米管/氧化石墨烯/硫复合正极材料的制备及其电化学性能 |
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| 引用本文： | 徐桂银,丁兵,聂平,骆宏钧,张校刚.碳纳米管/氧化石墨烯/硫复合正极材料的制备及其电化学性能[J].物理化学学报,2013,29(3):546-552. |
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| 作者姓名： | 徐桂银 丁兵 聂平 骆宏钧 张校刚 |
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| 作者单位： | College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China |
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| 基金项目： | 国家自然科学基金(21173120);江苏省自然科学基金重点专项(BK2011030);南京航空航天大学研究生创新基地(实验室)开放基金(kfjj120209)资助~~ |
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| 摘 要： | 以碳纳米管和氧化石墨烯(CNTs/GO)为主体材料, 通过化学还原法制备了CNTs/GO 负载硫的复合正极材料CNTs/GO/S. 扫描电子显微镜(SEM)及透射电子显微镜(TEM)测试表明, CNTs 均匀插层在GO片间, 从而形成三维多孔结构, 有利于电解液的浸润; 活性物质硫均匀地负载在CNTs/GO 表面. 电化学测试表明,CNTs/GO/S复合材料具有高的比容量和良好的循环稳定性: 在1C倍率电流密度下, 复合材料首次放电比容量高达904 mAh·g-1, 经过50圈循环之后, 复合材料的比容量仍保持在578 mAh·g-1.
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| 关 键 词： | 锂-硫电池 氧化石墨烯 碳纳米管 复合材料 循环性能 |
| 收稿时间： | 2012-10-08 |
| 修稿时间： | 2013-01-08 |
Preparation and Electrochemical Performance of Carbon Nanotubes/Graphene Oxide/Sulfur Complex Cathode Material |
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| XU Gui-Yin DING Bing,NIE Ping,LUO Hong-Jun ZHANG Xiao-Gang.Preparation and Electrochemical Performance of Carbon Nanotubes/Graphene Oxide/Sulfur Complex Cathode Material[J].Acta Physico-Chimica Sinica,2013,29(3):546-552. |
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| Authors: | XU Gui-Yin DING Bing NIE Ping LUO Hong-Jun ZHANG Xiao-Gang |
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| Institution: | College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China |
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| Abstract: | Three-dimensional (3D) hierarchical CNTs/GO/S ternary composites were prepared by solution-based reaction-deposition, using graphene oxide (GO) and carbon nanotubes (CNTs) as precursors. Scanning electron microscopy (SEM) and transmission electron microscope (TEM) indicated a uniform S coating on CNTs/GO which arose because of the large GO specific surface area. CNTs interspersed between the GO layers to form a 3D porous structure. Constant current charge-discharge tests showed that CNTs/GO/S composites had a high discharge capacity and excellent cycling stability, and delivered a high initial discharge capacity of 904 mAh·g-1 at 1C rate. After 50 cycles at the same rate, the reversible capacity remained at 578 mAh·g-1. |
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| Keywords: | Lithium-sulfur battery Graphene oxide Carbon nanotube Composite Cycling performance |
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