Journal
VACUUM
Volume 117, Issue -, Pages 35-39Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2015.03.032
Keywords
Graphene; Supercapacitors; Freeze-drying; Energy storage
Funding
- National Natural Science and Henan Province United Foundation of China [U1204601]
- National Natural Science Foundation of China [51472102, 21401064]
- Natural Science Foundation of Zhengzhou City [131PLJRC649, 20130800]
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In this work, we report a facile approach to synthesis of highly fluffy and wrinkled reduced graphene oxide by simple freeze-drying and microwave-expanding method in vacuum. Compared with thermal reduced graphene oxide (RGO), the as-synthesized freeze drying and microwave reduced graphene oxide (FMGO) electrodes exhibit an improved electrochemical performance with high specific capacitance of 246 F g(-1) at scan rate 5 mV s(-1) and good cycle stability for application in supercapacitors. The outstanding performance of FMGO as a supercapacitor is attributed to the highly fluffy and wrinkled graphene which permits the creation of three-dimensional networks to induce fast electron and ion transport, thus eventually leading the significantly improved electrochemical capacitive behaviors. (C) 2015 Elsevier Ltd. All rights reserved.
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