期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 17, 页码 6365-6369出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm04398b
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资金
- US Department of Energy [DE-SC0002247]
- Research Corporation for Science Advancement
- 3M
- DuPont
- National Science Foundation of China [20971117, 10979049]
Monodisperse V2O5 microspheres with a porous structure were synthesized by a very simple hydrolysis method and subsequent reduction/oxidation treatment at high temperatures. The porous V2O5 used as a cathode material for lithium-ion batteries (LIBs) shows a stable and highly reversible capacity. It also shows excellent low-temperature behavior with a reversible capacity of 102 mA h g(-1) at -20 degrees C. The excellent performance can be attributed to the porous structure of the V2O5 spheres, which are more electrochemically active due to a large interfacial contact area with the electrolyte. We believe the strategy of creating porosity may be extended to other electrode materials to improve the performance of lithium ion batteries.
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