Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 38, Pages 21472-21478Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06512
Keywords
lithium-ion batteries; anode; hollow core-shell; coaxial electrospinning; tin oxide; fibers
Funding
- 973 projects [2015CB932500, 2013CB934001]
- NSF of China [51172024, 51372022, 51302011]
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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.
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