基于聚丙烯酰胺制备的硅碳负极材料及性能  

Synthesis and performance of silicon carbon anode materials based on polyacrylamide

作　　者：冯丽娟[1,2,3] 甄玉刚 刘金秀[1] 王瑗钟[3] FENG Li-juan;ZHEN Yu-gang;LIU Jin-xiu;WANG Yuan-zhong(Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization,Weifang University of Science and Technology,Wefang Shandong 262700,China;Weifang Key Laboratory of Electrochemical Engineering and Technology for Materials,Weifang University of Science and Technology,Wefang Shandong 262700,China;Shandong WINA Green Power Technology Co.,Ltd.,Wefang Shandong 262700,China)

机构地区：[1]潍坊科技学院山东半岛卤水资源高值化绿色化综合利用工程技术研发中心,山东潍坊262700 [2]潍坊科技学院潍坊市材料电化学工程与技术重点实验室,山东潍坊262700 [3]山东威能环保电源科技股份有限公司,山东潍坊262700

出　　处：《电源技术》2020年第8期1096-1098,共3页Chinese Journal of Power Sources

基　　金：国家重点研发计划项目(2017YFB0102004);山东省自然科学基金项目(ZR2019MEM046);潍坊科技学院博士基金项目(2017BS06)。

摘　　要：为获得工艺和电化学性能俱佳的硅负极材料,以丙烯酰胺和硅粉为原料通过简单的合成工艺制备了一种复合物。借助X射线衍射技术、粒径分析和扫描电镜对该材料进行表征,结果表明制备的材料成分为硅、碳复合物,平均粒径为5.07μm,位于商用锂离子电池要求的负极材料粒径范围,具有出色的工艺性能。将该材料匹配高镍三元材料组装成纽扣电池进行电化学测试,它又表现出优异的电化学性能。其初始库仑效率为81.5%,放电比容量高达1 200 mAh/g以上。在1 C(1 200 mA/g)充放电速率下经过50个循环,容量保持率高于99%。鉴于其优良的工艺和电化学性能,该材料可望在高比能动力锂离子电池中广泛应用,推动我国新能源产业的发展。In order to improve the processing properties and electrochemical performance of silicon anode materials,the silicon composite was prepared by a simple synthesis process with acrylamide and silicon powder as raw materials.The materials were characterized by X-ray diffraction,particle size analysis and scanning electron microscopy.The results indicate that the active substance is a silicon carbon composite.The average particle size is 5.07 μm,which is located in the required particle size range of commercial lithium ion battery anode materials,and the material has excellent processing performance.When the material was assembled into a button battery with high-nickel ternary material for electrochemical testing,the prepared composite material exhibited excellent electrochemical activities.The initial coulomb efficiency is 81.5%,and the discharge specific capacity is 1 200 mAh/g.Throughout the 50 cycles at 1 C(1 200 mA/g),the capacity retention is higher than 99%.In view of its excellent processing and electrochemical properties,the composite material is expected to be widely applied in high specific energy power lithium ion batteries and promote the development of new energy industry.

关 键 词：锂离子电池 负极 硅碳 复合材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]