Remarkable High-temperature Performance of Hollow Co9S8 Nanoparticles Integrated with Carbon Materials for Lithium-ion Batteries

A solution-based “hot-injection” approach was developed to synthesize amorphous carbon-decorated and graphene-anchored hollow Co9S8 nanoparticles as anode material for Li ion battery application. Such a rationally designed dually-protected structure could effectively accommodate the volume expansion...

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Bibliographic Details
Published in:Electrochimica acta 2017-10, Vol.250, p.196-202
Main Authors: Lu, Mingjia, Liao, Chan, Jiang, Chan, Du, Yao, Zhang, Zhen, Wu, Songping
Format: Article
Language:English
Subjects:
Amorphous materials
Anode
Anodes
Batteries
Chemical synthesis
Co9S8
Electric vehicles
Graphene
High-temperature performance
Lithium-ion batteries
Lithium-ion battery
Nanocomposites
Nanoparticles
Rechargeable batteries
Thermal stability
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Summary:A solution-based “hot-injection” approach was developed to synthesize amorphous carbon-decorated and graphene-anchored hollow Co9S8 nanoparticles as anode material for Li ion battery application. Such a rationally designed dually-protected structure could effectively accommodate the volume expansion of Co9S8 nanoparticles during Li-cycling. As a result, as-synthesized nanocomposites could be successfully operated under ultrawide temperature window of −20°C–70°C, rendering excellent electrochemical performances, i.e., remarkable reversible capacities of 910mA h g−1 after 100 cycles (at 500mAg−1) and 622mA hg−1 after 200 cycles (at 1000mAg−1) at 70°C. These attributes enable three-dimensional structured Co9S8 nanoparticles to be promising anode materials of advanced Li-ion batteries for large-power applications such as electric vehicles under extreme temperature environments.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.08.019