Improved lithium-ion battery anode capacity with a network of easily fabricated spindle-like carbon nanofibers

Beilstein J Nanotechnol. 2016 Sep 14:7:1289-1295. doi: 10.3762/bjnano.7.120. eCollection 2016.

Abstract

A novel network of spindle-like carbon nanofibers was fabricated via a simplified synthesis involving electrospinning followed by preoxidation in air and postcarbonization in Ar. Not only was the as-obtained carbon network comprised of beads of spindle-like nanofibers but the cubic MnO phase and N elements were successfully anchored into the amorphous carbon matrix. When directly used as a binder-free anode for lithium-ion batteries, the network showed excellent electrochemical performance with high capacity, good rate capacity and reliable cycling stability. Under a current density of 0.2 A g-1, it delivered a high reversible capacity of 875.5 mAh g-1 after 200 cycles and 1005.5 mAh g-1 after 250 cycles with a significant coulombic efficiency of 99.5%.

Keywords: carbon nanofiber network; electrospinning; lithium-ion battery; manganese oxide; nitrogen modification.