Effect of carbonization temperature on the lithium storage performances of porous Sb/C nanocomposite

Hang Le; Huyen Nguyen; Thuy Hoang

doi:10.51316/jca.2020.019

Authors

Le Thi Thu Hang Hanoi University of Science and Technology Author
Nguyen Thi Thu Huyen Hanoi University of Science and Technology Author
Hoang Thi Bich Thuy Hanoi University of Science and Technology Author

DOI:

https://doi.org/10.51316/jca.2020.019

Keywords:

Antimony, composite, lithium storage, cyclability

Abstract

In the present study, Sb/C nanocomposites have been synthesized using citrate-gel method in combination with a carbonization process at different temperatures in N₂ gas. At reasonable carbonization temperatures, the porous Sb/C nanocomposites with novel foam like-interconnected three-dimensional structure, which is built-up by nanosized Sb particles covered by a carbon shell, are obtained. Among the synthesized composites, the Sb/C-600 sample, which is calcinated at 600 ^oC, exhibit the best lithium storage. At a discharge-charge rate of 0.1 C, the Sb/C-600 electrode can supply an initial reversible specific capacity of 640.7 mA h g^-1, 1.7 times higher than the theoretical specific capacity of graphite anode. During 100 cycles, the electrode shows a slight capacity decay with 0.0348% of loss capacity per cycle. Because of this featured architecture, the Sb/C nanocomposites severe as anode material with enhanced lithium storage performances for rechargeable lithium ion batteries.

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