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A SnO2/graphene composite as a high stability electrode for lithium ion batteries by Xuyang Wang; Xufeng Zhou; Ke Yao; Jiangang Zhang; Zhaoping Liu is a scholarly article available to read on EtoBox.

What is A SnO2/graphene composite as a high stability electrode for lithium ion batteries about?

A simple solution-based synthesis route, based on an oxidation-reduction reaction between graphene oxide and SnCl 2 •2H 2 O, has been developed to produce a SnO 2 /graphene composite. In the prepared composite, crystalline SnO 2 nanoparticles with sizes of 3-5 nm uniformly clung to the graphene matrix. When used as an electrode material for lithium ion batteries, the composite presented excellent rate performance and high cyclic stability. The effect of SnO 2 /graphene ratio on electrochemical performance has been investigated. It was found that the optimum molar ratio of SnO 2 /graphene was about 3.2:1, corresponding to 2.4 wt.% of graphene. The composite could deliver a charge capacity of 840 mAh/g (with capacity retention of 86%) after 30 charge/discharge cycles at a current density of 67 mA/g, and it could retain a charge capacity of about 590 and 270 mAh/g after 50 cycles at the current density of 400 and 1000 mA/g, respectively.

Author

Xuyang Wang; Xufeng Zhou; Ke Yao; Jiangang Zhang; Zhaoping Liu

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6223)

Published

2011

Language

EN