| 包覆型Si/C复合材料的制备及其性能研究 |
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| 引用本文： | 杜莉莉,庄全超,魏涛,崔永丽,孙智,孙世刚. 包覆型Si/C复合材料的制备及其性能研究[J]. 电化学, 2011, 17(2): 139-143. DOI: 10.61558/2993-074X.2083 |
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| 作者姓名： | 杜莉莉 庄全超 魏涛 崔永丽 孙智 孙世刚 |
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| 作者单位： | 1.中国矿业大学材料科学与工程学院锂离子电池实验室，江苏徐州 221116；
2. 厦门大学 固体表面物理化学国家重点实验室，化学化工学院化学系，福建 厦门 361005 |
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| 基金项目： | 中央高校基本科研业务费专项资金(编号:2010LKHX03、2010QNB04、2010QNB05); 中国矿业大学科技攀登计划(编号:ON090237)项目资助 |
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| 摘 要： | 分别采用球磨法和高温热解法制备了Si/C复合材料，XRD、SEM、电化学阻抗谱、循环伏安法和恒流充放电测试表征该Si/C复合材料的结构、形貌和电化学性能.结果表明，相比于球磨法，高温热解HDPE制备的Si/C复合材料颗粒形貌规则，碳的包覆较为均匀，导电性较好，阻抗较小.该复合材料首次嵌锂容量为4495 mAh/g，首次库仑效率65.3% ，从第2周开始库仑电效率都保持在97% 左右，经过100次充放电循环后仍能达到438 mAh/g的可逆容量，具有较好的电化学循环稳定性.
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| 关 键 词： | 锂离子电池 硅 高温热解法 |
| 收稿时间： | 2011-01-19 |
Preparation and Performance of Carbon-Coated Si/C Composites |
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| DU Li-li,ZHUANG Quan-chao,WEI Tao,CUI Yong-li,SUN Zhi,SUN Shi-gang. Preparation and Performance of Carbon-Coated Si/C Composites[J]. Electrochemistry, 2011, 17(2): 139-143. DOI: 10.61558/2993-074X.2083 |
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| Authors: | DU Li-li ZHUANG Quan-chao WEI Tao CUI Yong-li SUN Zhi SUN Shi-gang |
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| Affiliation: | DU Li-li1,ZHUANG Quan-chao1,WEI Tao1,CUI Yong-li1,SUN Zhi1,SUN Shi-gang2(1.Li-ion Batteries Lab,School of Materials Science and Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China,2.State Key Lab for Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China) |
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| Abstract: | The Si/C composite for lithium ion batteries was obtained by pyrolyzing and ball-milling.The microstructure and component of the composite was characterized by SEM and XRD,the electrochemical performance was investigated by electrochemical impedance spectroscopy(EIS),cyclic voltammetry(CV) and galvano static charge-discharge tests.The results illustrate that the particle of Si/C composite prepared by pyrolysis exhibits inerratic morphology,uniform carbon-coating layer,good electrical conductivity,low resist... |
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| Keywords: | lithium battery silicon high temperature pyrolysis |
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