Author(s)

Youwen Yang¹, Yuanhao Gao², Jiguang Liu¹, Xiaogang Fang¹

¹School of Materials Science and Engineering, Hefei University of Technology, Hefei, China.
²School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, China.

The exceptional mechanical and electrical nature of grapheme makes it a viable candidate for enhancing the effectiveness of electrode material. In recent years, Graphene based SiO₂ nanocomposites is a research hot topic of anode materials in lithium-ion batteries. In this paper, the amorphous SiO₂ nanospheres/graphene composite was synthesized by hydrothermal method. Amorphous SiO₂ is attached to the surface of graphene with a spherical structure and its average diameter is about 200 nm. The weight of SiO₂ in the nanospheres composite is about 43%. Electrochemical tests showed that the amorphous SiO₂ nanospheres/graphene composite exhibited the first charge and discharge capacity is respectively 329.5 mAhg^-1 and 444.1 mAhg^-1, and remain at 257.8 mAhg^-1 and 274.6 mAhg^-1 for 50^th cycles at a current density of 200 mAg^-1. The amorphous SiO₂ nanospheres/graphene composite structure is novelty and the results are of great significance to the preparation and application of new anode materials.

Amorphous SiO₂ Nanospheres, Graphene, Anode, Cycle Performance

Yang, Y. , Gao, Y. , Liu, J. and Fang, X. (2017) Hydrothermal Synthesis and Electrochemical Performance of Amorphous SiO₂ Nanospheres/Graphene Composites. Materials Sciences and Applications, 8, 959-965. doi: 10.4236/msa.2017.813070.