期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 12, 期 10, 页码 1419-1422出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.07.036
关键词
Graphite foil; Graphene nanosheets; Electrochemical exfoliation; Li ion batteries
资金
- Ministry of Education, Science and Technology [2010-0019116]
We demonstrate a highly efficient and large area synthesis of 2-D graphene nanosheets on the surface of flexible graphite foils by electrochemical exfoliation of graphite in an effective electrolyte, poly(sodium-4-styrenesulfonate) solution. A constant current of 150 mA/cm was applied to the vertically aligned graphite (anode) and copper (cathode) sheet in the PSS electrolyte solution during a preset time for electrolytic surface exfoliation of the graphite sheet; uniform expansion of the graphite foil was observed. This expanded foil was characterized using scanning electron microscopy, confocal laser scanning microscopy, and high-resolution transmission electron microscopy. Furthermore, we demonstrate the ability of this high surface area foil, covered with uniform graphene, to enable improved electrolyte permeability and Li ion transfer, thereby enhancing electrochemical performance of Li ion battery electrodes. (C) 2010 Elsevier B.V. All rights reserved.
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