静电纺丝法制备的多孔碳纳米纤维

Porous carbon nanofibers prepared by electrospinning technique

用静电纺丝法制备了聚丙烯腈（PAN）/聚甲基丙烯酸甲酯（PMMA）复合纳米纤维,经预氧化、高温炭化,制备用作锂离子电池负极材料的碳纳米纤维（CNF）。透射电子显微镜（TEM）和比表面积分析发现：制备的CNF具有多孔结构,比表面积达到572.9 m^2/g,平均孔径为33.6 nm。以50 mA/g的电流在0.01-3.00 V循环,制备的多孔CNF的首次放电比容量为333.3 mAh/g,第20次循环的可逆比容量为231.8 mAh/g,充放电效率近90%。

Polyacrylonitrile（PAN）/poly（methyl methacrylate）（PMMA） composite nanofibers were prepared by electrospinning technique,then porous carbon nanofibers（CNF） as anode material for Li-ion battery were obtained by pre-oxidation and high temperature carbonation.The analyses of transmission electron microscopy（TEM） and specific surface area showed that the as-prepared CNF had porous structure,the specific surface area was 572.9 m2/g,the mean pore size was 33.6 nm.When cycled in 0.01～3.00 V with the current of 50 mA/g,the initial specific discharge capacity of the as-prepared porous CNF was 333.3 mAh/g,the reversible specific capacity was 231.8 mAh/g at the 20th cycle,the charge-discharge efficiency was near 90%.