Characterization and Electrochemical Behavior of Graphene-Based Anode for Li-Ion Batteries
Wei-Ren Liu*, 1, 2, Shin-Liang Kuo1, Chia-Yi Lin2, Yi-Chen Chiu1, Ching-Yi Su1, Hung-Chun Wu1, Chien-Te Hsieh3
Identifiers and Pagination:Year: 2011
First Page: 236
Last Page: 241
Publisher Id: TOMSJ-5-236
Article History:Received Date: 19/10/2010
Revision Received Date: 25/5/2011
Acceptance Date: 23/6/2011
Electronic publication date: 02/12/2011
Collection year: 2011
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In this study, we investigate the characteristics and electrochemical properties of graphene nanosheets derived from chemical-thermal exfoliation processes of SFG44 synthetic graphite (SFG44-GNS). The characterizations and electrochemical measurements were carried out by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, cyclic voltammetry, BET, Raman, rate capability as well as cycling tests and AC impedance. The as-synthesized SFG44-GNS with larger d-spacing of 0.3407 nm exhibits reversible capacity of 626 mAh/g and good rate capability of ~ 300 mAh/g at 2C rate, which are superior to those of graphite anode. The enhanced electrochemical performance of GNS anode was resulted from larger d-spacing, lower impedance in the interface and enhanced pore volume. The results indicate that graphene-based material is a good candidate for HEV/EV application.