| 锂硫电池正极用硫/介孔碳复合材料的制备及电化学性能 |
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| 引用本文： | 徐晶晶,李彬,李松梅,刘建华,于美.锂硫电池正极用硫/介孔碳复合材料的制备及电化学性能[J].无机化学学报,2015,31(10):2030-2036. |
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| 作者姓名： | 徐晶晶 李彬 李松梅 刘建华 于美 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院, 先进空天材料与服役教育部重点实验室, 北京 100191,北京航空航天大学材料科学与工程学院, 先进空天材料与服役教育部重点实验室, 北京 100191,北京航空航天大学材料科学与工程学院, 先进空天材料与服役教育部重点实验室, 北京 100191,北京航空航天大学材料科学与工程学院, 先进空天材料与服役教育部重点实验室, 北京 100191,北京航空航天大学材料科学与工程学院, 先进空天材料与服役教育部重点实验室, 北京 100191 |
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| 基金项目： | 国家自然科学基金(No.51271012)资助项目。 |
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| 摘 要： | 制备了以十二烷基硫酸钠(SDS)为模板的介孔碳,并将介孔碳和单质硫采用熔融渗透法复合制得硫/介孔碳复合材料。SEM、TEM和BET结果显示介孔碳成直径约为500 nm的大小均一的球体,存在孔径为2 nm的微孔;单质硫充分填充在介孔碳的微孔中。以硫/介孔碳复合物作为锂硫电池正极材料时显示出高的电化学性能。初始放电容量高达1519 mAh·g-1,在200 mA·g-1的电流密度下充放电200个循环后依然能保持在835 mAh·g-1。硫/介孔碳复合材料的高倍率性能和优异的循环稳定性,源于介孔碳良好的导电性及其孔结构的固硫作用。
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| 关 键 词： | 锂硫电池 介孔碳 正极材料 电化学性能 |
| 收稿时间： | 2015/4/16 0:00:00 |
| 修稿时间： | 2015/6/24 0:00:00 |
Preparation and Electrochemical Performance of Sulfur/Mesoporous Carbon Composites as Cathodes for Lithium-Sulfur Batteries |
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| XU Jing-Jing,LI Bin LI,Song-Mei,LIU Jian-Hua and YU Mei.Preparation and Electrochemical Performance of Sulfur/Mesoporous Carbon Composites as Cathodes for Lithium-Sulfur Batteries[J].Chinese Journal of Inorganic Chemistry,2015,31(10):2030-2036. |
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| Authors: | XU Jing-Jing LI Bin LI Song-Mei LIU Jian-Hua and YU Mei |
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| Institution: | Key Laboratory of Aerospace Materials and Performance, Ministry of Education School of Science and Engineering, Beihang University, Beijing 100191, China,Key Laboratory of Aerospace Materials and Performance, Ministry of Education School of Science and Engineering, Beihang University, Beijing 100191, China,Key Laboratory of Aerospace Materials and Performance, Ministry of Education School of Science and Engineering, Beihang University, Beijing 100191, China,Key Laboratory of Aerospace Materials and Performance, Ministry of Education School of Science and Engineering, Beihang University, Beijing 100191, China and Key Laboratory of Aerospace Materials and Performance, Ministry of Education School of Science and Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | Sulfur/mesoporous carbon composites were achieved by melt infiltration of sulfur into mesoporous carbon which was prepared by template method. SEM images show the Sulfur/mesoporous carbon composites are sphere with uniform diameter about 500 nm and TEM illustrate sulfur with 2 nm size is infiltrated in mesoporous carbon. XRD, BET and TG was employed to analysis the sulfur/mesoporous carbon composites. When the sulfur/mesoporous carbon composites were applied as cathode material for lithium sulfur, it exhibited high electrochemical performance. The initial discharge specific capacity of the sulfur/mesoporous carbon composites is as high as 1 519 mAh·g-1 at the current densities of 200 mA·g-1, and can remain 835 mAh·g-1 even after 200 cycles. |
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| Keywords: | lithium-sulfur battery mesoporous carbon cathode material electrochemical performance |
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