Journal
NANOSCALE
Volume 8, Issue 4, Pages 2030-2040Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr08399k
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Funding
- Chinese Central Government [0220002102003]
- National Natural Science Foundation of China (NSFC) [21373280, 21403019]
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Hundred Talents Program at Chongqing University [0903005203205]
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In this paper, a novel peapod-like Li4Ti5O12-C composite architecture with high conductivity is firstly designed and synthesized to be used as anode materials for lithium-ion batteries. In the synthesis, Na2Ti3O7 nanotubes act as precursors and sacrificial templates, and glucose molecules serve as the green carbon source, thus the peapod-like Li4Ti5O12-C composite can be fabricated by a facile hydrothermal reaction and the subsequent solid-state process. Compared to the previous reports, the as-prepared samples obtained by our new strategy exhibit excellent electrochemical performances, such as outstanding rate capability (an extremely reversible capability of 148 mA h g(-1), 125 mA h g(-1) at 30 C and 90C, respectively) as well as excellent cycling performance (about 5% capacity loss after 5000 cycles at 10 C with 152 mA h g(-1) capacity retained). The low-temperature measurements also demonstrate that the electrochemical performances of the peapod-like Li4Ti5O12-C composite are remarkably improved at various rate currents (at the low-temperature of -25 degrees C, a high Coulombic efficiency of about 99% can be achieved after 500 cycles at 10 C).
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