Asphalt-Decomposed Carbon-Coated SnO2 as an Anode for Lithium Ion Batteries
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In this paper, a SnO2@C composite anode was prepared by coating SnO2 with asphalt by hydrothermal process and carbonization. The core–shell structure of SnO2 nanoparticles was characterized by scanning electron microscopy, energy-dispersive spectrometry, x-ray diffraction and thermal gravimetric analysis. The electrochemical performance tests showed the SnO2@C anode exhibited excellent cycle performance and high specific capacity. The core–shell structure can accommodate the huge volume expansion of SnO2 nanoparticles during charge/discharge. The conductivity of the electrode was also obviously enhanced. The first-charge capacity and coulombic efficiency reached 1798 mAh/g and 65%, respectively. After 80 cycles, the capacity still remained at 446 mAh/g at a current density of 100 mA/g.
KeywordsSnO2 asphalt coating lithium ion battery anode
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This study was funded by the Jiangxi scientific fund (20142BBE50071) and Jiangxi education fund (KJLD13006).
Conflict of interest
We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.
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