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VO2 nanobelts decorated with a secondary hydrothermal chemical lithiation method for long-life and high-rate Li-ion batteries
•Pre-lithiated VO2(B) nanobelts were synthesized by a secondary hydrothermal method.•Pre-lithiated VO2(B) nanobelts electrode exhibits a high specific capacity of 264 mA h/g for Li-ion battery.•The embedding of Li ions enlarges the interplanar spacing of VO2(B) and diffusion coefficient.•Even after...
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Published in: | Journal of alloys and compounds 2022-03, Vol.896, p.162894, Article 162894 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •Pre-lithiated VO2(B) nanobelts were synthesized by a secondary hydrothermal method.•Pre-lithiated VO2(B) nanobelts electrode exhibits a high specific capacity of 264 mA h/g for Li-ion battery.•The embedding of Li ions enlarges the interplanar spacing of VO2(B) and diffusion coefficient.•Even after 800 cycles at 1000 mA g−1, the capacity retention rate still retains 87.2%.
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In this work, pre-lithiated VO2(B) nanobelts are synthesized by a two-step hydrothermal method. After pre-lithiation, the VO2(B) nanobelts exhibit a uniformly dispersed morphology with a large specific surface area. Compared to pure VO2(B) nanobelts, the pre-lithiated VO2(B) nanobelts show much better electrochemical performance in terms of cycling stability and high-rate capability. The lithium-ion diffusivity in the pre-lithiated VO2(B) nanobelts is enhanced due to enlargement of the crystal lattice after pre-lithiation. The pre-lithiated VO2(B) nanobelt cathode delivers an initial specific capacity of 264 mA h g–1 at 0.1 A g–1 with a capacity retention of 81.6% after 100 cycles, which is superior to that obtained for pure VO2(B) under the same conditions (initial capacity of 221.5 mA h g–1 and capacity retention of 63.3%). Moreover, the pre-lithiated VO2(B) nanobelt electrode exhibits outstanding long-term cycling stability (capacity retention of 87.2% after 800 cycles at 1000 mA g–1). These results indicate that pre-lithiated VO2(B) nanobelts have great potential to be applied as an advanced cathode material for next-generation lithium-ion batteries. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2021.162894 |