Abstract
AbstractSnO2@CMK‐3 composites with different SnO2 contents have been successfully synthesized using incipient wetness technique. Because of a high specific area and porosity, CMK‐3 enables facile penetration of SnCl4 solution inside. Accordingly, SnCl4 clusters confined in the CMK‐3 mesopores easily transform to SnO2 nanoparticles. The obtained SnO2@CMK‐3 composites show a high surface area in a range from 224.8 to 398.1 m2/g and good lithium storage properties. Among the resultant composites, the composite‐70 with 70 % of SnO2 shows the best electrochemical performance. At the rate of C/10, the composite‐70 electrode delivers an average discharge capacity of 678 mAh/g. At high rates such as 5C, and 10C the electrode still achieves a discharge capacity of 270, and 201 mAh/g, respectively. Even after 1000 cycles at the rate of C/2, the electrode maintains 67.8 % of the initial capacity.
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