Simple
Preparation of Carbon Nanofibers with Graphene Layers Perpendicular
to the Length Direction and the Excellent Li-Ion Storage Performance
- Publication date
- Publisher
Abstract
Sulfur-containing carbon nanofibers
with the graphene layers approximately vertical to the fiber axis
were prepared by a simple reaction between thiophene and sulfur at
550 °C in stainless steel autoclaves without using any templates.
The formation mechanism was discussed briefly, and the potential application
as anode material for lithium-ion batteries was tentatively investigated.
The carbon nanofibers exhibit a stable reversible capacity of 676.8
mAh/g after cycling 50 times at 0.1 C, as well as the capacities of
623.5, 463.2, and 365.8 mAh/g at 0.1, 0.5, and 1.0 C, respectively.
The excellent electrochemical performance could be attributed to the
effect of sulfur. On one hand, sulfur could improve the reversible
capacity of carbon materials due to its high theoretical capacity;
on the other hand, sulfur could promote the formation of the unique
carbon nanofibers with the graphene layers perpendicular to the axis
direction, favorable to shortening the Li-ion diffusion path