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硫/有序介孔碳复合材料的制备及其电化学性能
作者:李永 董晓雯 赵宏滨 徐甲强 
单位:上海大学理学院化学系 上海200444 
关键词:硫电极 软模板法 有序介孔碳 复合材料 阴极材料 
分类号:TQ152
出版年,卷(期):页码:2011,39(4):20-24
DOI:
摘要:

用模板法合成有序介孔碳材料(ordered mesoporous carbon,OMC),以该材料作为硫的载体,用低温熔融的方法制备了硫/有序介孔碳(S/OMC)复合材料。通过透射电子显微镜、比表面分析和X射线粉末衍射仪对材料进行表征。结果表明:OMC孔道有序,比表面积高达1 600 m2/g,硫在OMC内分散性良好。对S/OMC又进行了恒流充放电、循环伏安和交流阻抗等电化学性能测试,显示S/OMC电化学可逆性较好,首次放电容量达1 430 mA?h/g,60次循环时仍稳定在500 mA?h/g。OMC内部有序的孔道和较大的表面微孔对电池性能的提高起到了重要的作用。

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An ordered mesoporous carbon (OMC) material was synthesized via a template synthesis method. The composites of S/OMC with OMC as a matrix of sulfur were prepared by means of low temperature melting. The composites were investigated by transmission electron microscopy, Brunauer-Emmett-Teller method and X-ray powder diffraction. The results show that the channels of OMC is in an order, and the specific surface area of OMC is >1 600 m2/g. The sulfur could be efficiently dispersed in OMC. The composites of S/OMC were determined by galvanostatic charge/discharge, cyclic voltammograms and electrochemical impedance spectroscopy. It is indicated that the S/OMC has preferable electrochemical reversible, and the first discharge capacity reaches 1 430 mA·h/g and stabilizes at 500 mA·h/g after 60 cycles. It is essential for the improvement of the battery performance to possess the massive micropores with the greater surface area existed in the OMC.

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基金项目:
上海大学研究生创新基金(SHUCX 102021)、上海博士后基金(10R21412900)、中国博士后基金(20100470677)资助项目。
作者简介:
硕士研究生
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参考文献:

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