Electrochemical Performance of SiO/C Composites as Anode Material for Li-Ion Batteries

Jing Wang; Mei Juan Zhou; Feng Wu; Shi Chen

doi:10.4028/www.scientific.net/AMR.1092-1093.185

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1092-1093Electrochemical Performance of SiO/C Composites as...

Electrochemical Performance of SiO/C Composites as Anode Material for Li-Ion Batteries

Abstract:

Dopamine was used as the carbon precursor to prepare SiO/C composite. Dopamine achieved self-polymerization and covered on the surface of the SiO particles in Tris-buffer, and the SiO/C composites were gained after heat-treating in the tube furnace under Argon. X-ray diffraction ( XRD ) , scanning electron microscope ( SEM ) were used to determine the phases obtained and to observe the morphologies of the composite. The galvanostatic discharge/charge test was carried out to characterize the electrochemical properties of the composite. When the sample of the mixed SiO and dopamine at a weight ratio of 1 : 3, the composite showed the best cycle ability with the discharge capacity of 1362 mAh g⁻¹ in the first cycle, and the initial coulombic efficiency is 55.6%, after 50 cycles, the discharge capacity is 442 mAh g⁻¹. The improved stability of the composite is attributed to carbon-coating forming during heat-treatment process.

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Periodical:

Advanced Materials Research (Volumes 1092-1093)

Pages:

185-190

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1092-1093.185

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Online since:

March 2015

Authors:

Jing Wang*, Mei Juan Zhou, Feng Wu, Shi Chen

Keywords:

Anode Materials, Dopamine, Li-Ion Batteries, SiO

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* - Corresponding Author

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