期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 11, 页码 3652-3658出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta00949a
关键词
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资金
- Department Science Foundation of China [210204]
- National Natural Science Foundation of China [U0937601]
- 863 Program of National High Technology Research Development Project of China [2011AA03A405]
An effective approach of template-free alcoholysis is employed to prepare hollow core-shell SnO2/C nanoparticle aggregates as anode materials for Li-ion batteries. Amorphous carbon can be loaded on the SnO2 nanoparticles uniformly in the solvothermal alcoholysis process, and the subsequent calcination results in the formation of hollow core-shell SnO2/C nanoparticle aggregates. They exhibit a stable reversible capacity of 640 mA h g(-1) at a constant current density of 50 mA g(-1), and the capacity retention is maintained over 90.9% after 100 cycles. The intrinsic hollow core-shell nature as well as high porosity of the unique nanostructures ensures the electrode has a high capacity and a good electronic conductivity. The hollow loose structure offers sufficient void space, which sufficiently alleviates the mechanical stress caused by volume change. Herein, the SnO2/C electrode presents excellent electrochemical performance. This method is simple, low cost, mass-productive, and can also be used to prepare other advanced functional materials.
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