The Self-assembled SnO<sub>2</sub>-FeO(OH) on Natural Graphite Surface as A High-capacity Anode for Lithium Ion Batteries

YANG Wenwen; ZHOU Yulin; WANG Mengyue; ZHANG Liya; LEI Jianfei

doi:10.6054/j.jscnun.2021023

Journal of South China Normal University (Natural Science Edition) > 2021 > 53(2): 29-34. > DOI: 10.6054/j.jscnun.2021023

YANG Wenwen, ZHOU Yulin, WANG Mengyue, ZHANG Liya, LEI Jianfei. The Self-assembled SnO₂-FeO(OH) on Natural Graphite Surface as A High-capacity Anode for Lithium Ion Batteries[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(2): 29-34. DOI: 10.6054/j.jscnun.2021023

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The Self-assembled SnO₂-FeO(OH) on Natural Graphite Surface as A High-capacity Anode for Lithium Ion Batteries

School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China

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Received Date: January 03, 2021
Available Online: April 28, 2021

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Abstract

Abstract

A stable H₂SnO₃@Fe(OH)₃ colloidal solution is prepared through double hydrolysis. It is self-assembled on the surface of natural graphite under the action of electrostatic adsorption. After the hydrothermal reaction, the H₂SnO₃@Fe(OH)₃ colloidal micelles on the surface of graphite are changed into SnO₂-FeO(OH) co-dispersed structures. The structural characterizations show that there is a dense nanostructure coating on the surface of natural graphite after hydrothermal reaction, composed of ultrafine SnO₂ nanocrystalline particles (< 6 nm) and amorphous FeO(OH). The electrochemical testing results indicate that the SnO₂-FeO(OH) fine nanostructures can not only improve the charge/discharge capacity of graphite, but also improve its cyclic stability. At a current density of 0.1C, the initial cycle efficiency of the modified graphite can reach 77.5%. After 100 cycles, the discharge capacity of modified graphite can be maintained at 384.4 mAh/g, which is 23% higher than that of commercial graphite.
- graphite,
- lithium ion battery,
- electrochemistry,
- energy storage,
- anode,
- SnO₂

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References (18)

References

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