A facile synthesis of graphite/silicon/graphene spherical composite anode for lithium-ion batteries

By L. Gan, Huajun Guo, Zhixing Wang, Xinhai Li, Peng Wenjie, Jiexi Wang, Si Huang, Su Mingru. 2013

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a b s t r a c t The Graphite/Silicon@reGO composite was synthesized via spray drying and subsequent annealing. According to XRD, Raman spectroscopy and FT-IR, graphene was demonstrated to be existed in the composite. Moreover, SEM and TEM were also used to illustrate the morphology of Graphite/Silicon@reGO. Used as anode for lithium-ion battery, it exhibited good cyclability with a high reversible charge capacity of 575.1 mAh g−1 and showed a capacity retention ratio of 73.1% after 50 cycles at a current density of 50 mA g −1 . It also presented good rate capability at different rates of 50–1000 mA g −1 . EIS test showed that the composite electrode had a lower SEI resistance and charge-transfer resistance due to the existence of graphene.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/7e708afa3528cf8b89c6a09c2097a5f75b70e3d4