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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (11): 3740-3749.

• Ceramics • Previous Articles     Next Articles

Preparation and Electrochemical Performance of SnO2 Supported on Porous Bamboo Charcoal

WU Hong, CHEN Qianlin, LI Cuiqin   

  1. College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
  • Received:2021-05-14 Revised:2021-06-10 Online:2021-11-15 Published:2021-12-08

Abstract: Porous bamboo charcoal is amorphous carbon with abundant pore structure, and the pore size ranges from 1 nm to 6 nm, with a large pore volume (1.21 cm3/g). Using porous bamboo charcoal as the carrier, the B2O3-SnO2/C composite material was prepared by the sol-gel method. SEM and TEM results show that SnO2 and B2O3 are uniformly distributed on the surface of the porous bamboo charcoal. The porous bamboo charcoal and B2O3 effectively accommodate the volume change of the reversible reaction of SnO2 and improve the cycling stability of SnO2. The lithium-ion batteries were assembled by B2O3-SnO2/C composite materials as anode, and the electrochemical performance was tested. After 200 cycles, the discharge specific capacity still reaches 649.9 mAh/g at 1 C (1 C=372 mA/g) rate, and the discharge specific capacity retention rate is as high as 58.6%. The charge-discharge process of B2O3-SnO2/C porous composites is controlled by diffusion and capacitance behavior, and the contribution rate of capacitance control increases with the increase of scan rate.

Key words: B2O3-SnO2/C composite, cycling stability, lithium-ion battery, anode material, porous bamboo charcoal, sol-gel method

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