同轴静电纺制备多孔C/Ni复合纳米纤维  

The preparation of C/Ni composite nanofibers with pores by Coaxial electros pinning

作　　者：董晓东[1] 王欣[2] 魏取福[2] 高翼强[1] 

机构地区：[1]河北科技大学纺织服装学院,河北石家庄050018 [2]江南大学生态纺织教育部重点实验室,江苏无锡214122

出　　处：《河北纺织》2012年第2期56-63,共8页

摘　　要：利用同轴静电纺制各了聚丙烯腈（PAN）／乙酸镍／聚乙烯吡咯烷酮（PVP）复合纳米纤维，再经预氧化、碳化过程制各具有多孔结构的复合纳米纤维。通过X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）及透射电子显微镜（TEM）对纤维结构、形貌进行表征，结果表明，纤维表面具有明显的多孔结构，金属镍为立方晶，粒径大小在20-90nm之间。在50mA／g的电流密度下对其电化学循环性能进行了测试。多孔复合纳米纤维首次放电容量达605mAh／g，第20次循环可逆容量为435mhh／g，充放电效率为97．4％。PAN/Nickel acetate/PVP composite nanofibers were prepared by Co-electrospinning, then C/Ni composite nanofibers with pores, as anode material for Li-ion battery, were pre-oxidation and high temperature carbonation. XRD, FE-SEM and TEM were used to investigate structures and morphology of composite nanofibers, the results showed that fiber surface had obvious porous structure, metal nickel was cubic crystalline and the range of metal nickel mainly was between 20 nm and 90 nm. The cycling performance were tested in the current density of 50mA/g, the first charge capacity of porous composite nanofbiers was 605mAh/g, the reversible specific capacity was 435mAh/g at the 20th cycle the charge-discharge efficiency was 97.44%%.

关 键 词：同轴静电纺丝法 复合纳米纤维 多孔结构 负极材料 充放电性能 

分 类 号：TQ658.41[化学工程—精细化工]