喷雾干燥法构建硅/碳复合材料及其电化学性能研究  

Research on Preparation and Electrochemical Properties of Silicon/Carbon Composites by Spray Drying Method

作　　者：孟奇[1,2,3] 周思源 李坤 张英杰 董鹏[1,2,3] 张义永 MENG Qi;ZHOU Si-yuan;LI Kun;ZHANG Ying-jie;DONG Peng;ZHANG Yi-yong(College of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Yunnan Kunming 650093;National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology,Kunming University of Science and Technology,Yunnan Kunming 650093;Key Laboratory of Advanced Battery Materials of Yunnan Province,Kunming University of Science and Technology,Yunnan Kunming 650093;College of Materials Science and Engineering,Kvnming University of Science and Technology,Yunnan Kunming 650093;Hefei Guoxuan Gaoke Power Energy Co.,Ltd.,Anhui Hefei 230011,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明理工大学锂离子电池及材料制备技术国家地方联合工程实验室,云南昆明650093 [3]昆明理工大学云南省先进电池材料重点实验室,云南昆明650093 [4]昆明理工大学材料科学与工程学院,云南昆明650093 [5]合肥国轩高科动力能源有限公司,安徽合肥230011

出　　处：《广州化工》2019年第21期32-36,共5页GuangZhou Chemical Industry

基　　金：昆明理工大学高层次人才引进科研启动项目;国家自然科学基金(51764029);云南省应用基础研究计划(2018FB087)

摘　　要：硅负极因其理论比容量高而受到了广泛的研究关注。但由于其导电性差和体积效应等缺点限制了硅负极的推广应用。本研究利用简便、易操作的喷雾干燥法构建了具有三维导电网络的硅/碳纳米管/碳复合材料。经过表征可知,硅/碳纳米管/碳复合材料为近球形状,具有稳定的导电框架,表现出优异的电化学性能。因此,此方法制备的硅碳复合材料有商业化应用的潜力。Silicon anode has attracted much attention because of its high theoretical specific capacity. However,the application of silicon negative electrode is limited due to its poor conductivity and volume effect. A silicon/carbon nanotube/carbon composite material with three-dimensional conductive network was constructed by using a simple and easy spray drying method. The results showed that the silicon/carbon nanotubes/carbon composites were spherical particles with a stable conductive framework,showing excellent electrochemical properties. Therefore,the silicon-carbon composites prepared by this method have potential commercial applications.

关 键 词：锂离子电池 硅负极 硅/碳纳米管/碳复合材料 喷雾干燥 

分 类 号：TM912.9[电气工程—电力电子与电力传动]