Journal
RSC ADVANCES
Volume 4, Issue 48, Pages 25220-25226Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra01923g
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Funding
- National Natural Science Foundation of China [21171015, 21373195, 11174334]
- Chinese Government
- program for New Century Excellent Talents in University (NCET)
- Fundamental Research Funds for the Central Universities [WK2060140014, WK2060140016]
- Alexander von Humboldt Foundation
- Chinese Academy of Sciences
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Free-standing CNT/Li4Ti5O12/C composite nanofibers with uniformly dispersed Li4Ti5O12 nanoparticles and CNTs in a one-dimensional (1D) carbon nanofiber matrix were developed for high-power electrode materials in Na-ion batteries. The carbon nanofibers act as a matrix to enable better dispersion of Li4Ti5O12 and restrict the Li4Ti5O12 particle size at the nanoscale. The CNTs were introduced to construct a three-dimensional (3D) network between Li4Ti5O12 particles and to enhance the conductivity of the electrode, thereby realizing the full potential of the active materials. Free-standing CNT/Li4Ti5O12/C composite nanofibers achieved a discharge capacity of 119 mA h g(-1) after 100 cycles at a current density of 100 mA g(-1), corresponding to 95.2% of the initial charge capacity (125 mAh g(-1)) and a better rate capability (77 mAh g(-1) at 50 0mA g(-1)). This design could also be further extended to other electrode materials, which promises to promote the development of next-generation Li-ion batteries or Na-ion batteries.
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