光伏硅弃料制备锂离子电池硅负极的性能  

Performance of Si anode for Li-ion battery prepared by photovoltaic Si waste materials

作　　者：杨鑫[1] 谢文政 王志国 张纯 喻鹏[1] 刘辉[1] YANG Xin;XIE Wenzheng;WANG Zhiguo;ZHANG Chun;YU Peng;LIU Hui(College of Chemistry and Materials Science,Hunan Agricultural University,Changsha,Hunan 410128,China)

机构地区：[1]湖南农业大学化学与材料科学学院,湖南长沙410128

出　　处：《电池》2024年第4期589-594,共6页Battery Bimonthly

基　　金：湖南省教育厅科学研究优秀青年项目(23B0216);长沙市自然科学基金(kq2208079)。

摘　　要：纯硅的导电性差,且纳米化、非晶化技术成本高。光伏行业用硅的产业化程度高、导电性好,弃料可在锂离子电池硅基负极实现再利用。以光伏硅弃料为原料,采用机械球磨法制备纳米硅和非晶/纳米硅材料。制备的材料均具有较高的可逆比容量和稳定的循环性能,以0.2 C在0.005~0.900 V循环100次,纳米硅剩余的比容量为2 123.32 mAh/g,非晶/纳米硅剩余的比容量为1 367.70 mAh/g。Pure silicon exhibits poor conductivity,and the cost of nanocrystallization/amorphization technology is high.The silicon in photovoltaic industry is highly industrialized and has good conductivity,the waste materials can be reutilized as silicon-based anode for Li-ion battery.Nanocrystalline silicon and amorphous/nanocrystalline silicon using photovoltaic silicon waste materials as raw materials are prepared by mechanical ball milling.The prepared materials exhibit high reversible capacity and stable cycle performance.After cycling 100 times at 0.2 C in 0.005-0.900 V,the remaining specific capacity of nanocrystalline silicon is 2123.32 mAh/g,the remaining specific capacity of amorphous/nanocrystalline silicon is 1367.70 mAh/g.

关 键 词：硅 锂离子电池 负极 纳米化 非晶化 光伏硅 

分 类 号：TM912.9[电气工程—电力电子与电力传动] TM914.41