Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 7, Issue 1, Pages 323-328Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee42944j
Keywords
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Funding
- National Science Foundation of China [21373155, 2133307]
- Program for New Century Excellent Talents in University [NCET-12-0419]
- National high technology development program of China (863) [2012AA110102]
- independent research project of state grid corporation of China
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Sb-C nanofibers are synthesized successfully through a single-nozzle electrospinning technique and subsequent calcination. The structural and morphological characterizations reveal the uniform nanofiber structure with the Sb nanoparticles embedded homogeneously in the carbon nanofibers. Electrochemical experiments show that the Sb-C nanofiber electrode can deliver large reversible capacity (631 mA h g(-1)) at C/15, greatly improved rate capability (337 mA h g(-1) at 5 C) and excellent cycling stability (90% capacity retention after 400 cycles). The superior electrochemical performances of the Sb-C nanofibers are due to the unique nanofiber structure and uniform distribution of Sb nanoparticles in carbon matrix, which provides a conductive and buffering matrix for effective release of mechanical stress caused by Na ion insertion/extraction and prevent the aggregation of the Sb nanoparticles.
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