Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 18, Pages 10038-10044Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01061f
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Funding
- National Natural Science Foundation of China [NSFC 21173049]
- Research Fund for the Doctoral Program of Higher Education of China [RFDP 20133514110002]
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A facile one-step hydrothermal route was designed for preparing ultrathin TiO2-B nanowires, which were then hybridized with RGO to form a TiO2-B/RGO hybrid via an in situ approach, and both of them have a large BET surface area (231.6 m(2) g(-1) for TiO2-B nanowires and 256.1 m(2) g(-1) for the TiO2-B/RGO hybrid). It was found that the synthesized ultrathin nanowires are perpendicular to the [010] direction which is the most open channel in the TiO2-B crystal structure, demonstrating more Li-ion insertion/extraction hosts exposed to the electrolyte. Thus, the cell made of TiO2-B ultrathin nanowires exhibited large reversible lithium-ion charge-discharge capacity, excellent cycling stability and high-rate capability. When combined with RGO, the formed TiO2-B/RGO hybrid exhibited further improved Li storage performance. For instance, a capacity of 205.3 mA h g(-1) was obtained at the fourth cycle and then faded slightly to 189.4 mA h g(-1) after 300 cycles, demonstrating a surprising low average capacity fading of ca. 0.026% per cycle from 4th to 300th cycles.
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