Abstract
Given their competitive prospects for energy storage, lithium-ion batteries (LIBs) have attracted ever-intensive research interest. However, the large volume changes during cycling and structural pulverization significantly hinder the cycling stability and high capacity for lithium-alloy electrodes. Herein, novel one-dimensional (1D) hollow core-shell SnO2/C fibers were synthesized by facile coaxial electrospinning. The as-prepared fibers that possess sufficient hollow voids and nanosized SnO2 particles on the inner shell are able to serve as an anode in LIBs. The results suggest a reversible capacity of 1002 mAh g-1 (for the initial cycle at 100 mA g-1), excellent rate capability, and a highly stable cycling performance with a discharge capacity of 833 mAh g-1 after 500 cycles at 600 mA g-1. The superior electrochemical performance is attributed to the unique hollow core-shell structure, which offers sufficient voids for alleviating the volume changes of SnO2 nanoparticles during lithiation/delithiation processes. The promising strategies and associated opportunities here demonstrate great potential in the fabrication of advanced anode materials for long-life LIBs.
Original language | English |
---|---|
Pages (from-to) | 21472-21478 |
Number of pages | 7 |
Journal | ACS applied materials & interfaces |
Volume | 7 |
Issue number | 38 |
DOIs | |
Publication status | Published - 30 Sept 2015 |
Externally published | Yes |
Keywords
- anode
- coaxial electrospinning
- fibers
- hollow core-shell
- lithium-ion batteries
- tin oxide