静电纺丝制备锂离子电池负极材料多孔碳纳米纤维的研究  

Study on the preparation of lithium ion battery anode material porous carbon nanofibers through electrospining method

作　　者：马小彪 陈思浩[2] 高伟 

机构地区：[1]上海工程技术大学服装学院,上海201620 [2]上海工程技术大学化工学院,上海201620 [3]苏州宇量电池有限公司,江苏苏州215500

出　　处：《现代化工》2017年第5期131-134,136,共5页Modern Chemical Industry

基　　金：上海工程技术大学研究生科研创新项目(15KY0909)

摘　　要：由聚丙烯腈(PAN)、聚苯乙烯(PS)和N,N-二甲基甲酰胺、四氢呋喃组成的前驱体溶液通过静电纺制备聚合物纳米纤维。聚合物纳米纤维在热解碳化过程中由于PS的分解致使纤维内部和表面生成多孔结构。PS的分解能够减小纤维的直径和增加孔隙率,进而增加纤维的比表面积。由PAN/PS(质量比2∶1)制备的碳纳米纤维在200 m A/g的电流密度下的放电容量达到416 m Ah/g,是由PAN制备的碳纳米纤维放电容量的2倍,循环100次后放电容量为353 m Ah/g,具有84%的容量保持率,证明其较好的循环性能。Polymer nanofiber has been prepared through electrospinning method in a precursor solution containing polyacrylonitrile（ PAN）,polystyrene（ PS）,N,N-dimethylformamide and tetrahydrofuran. During pyrolysis carbonization treatment on polymer nanofiber,PS can decompose to form porous structure both in interior and on the surface of nanofibers. Decomposition of PS can also help to decrease the fiber diameter and increase the porosity of carbon nanofibers,furthermore enhancing specific surface area of nanofibers. The carbon nanofibers with PAN/PS ratio being 2∶ 1exhibit a discharge capacity of 416 m Ah/g under a current density of 200 m A/g,which is approximately twice that of the neat PAN-derived carbon nanofibers. And they still exhibit a discharge capacity of 353 m Ah/g after 100 cycles,corresponding to 84% capacity retention,and demonstrating the favorable cycle stability.

关 键 词：锂离子电池 负极材料 静电纺丝 多孔碳纳米纤维 

分 类 号：TM53[电气工程—电器]