Release Time:2022-06-28  Hits:

Date of Publication: 2014-01-01

Journal: 高等学校化学学报

Institution: 化工学院

Volume: 35

Issue: 3

Page Number: 619-625

ISSN: 0251-0790

Abstract: Large-scale (φ=10 cm ) graphene paper ( GP ) was prepared by the reduction of graphite oxide paper( GOP) self-assembled at the liquid/air interface with hydrazine hydrate vapor. The morphology, struc-ture, components and BET surface area of GOP and GP were characterized by scanning electron microscopy ( SEM ) , X-ray diffraction ( XRD ) , Raman spectroscopy, X-ray photoelectron spectroscopy ( XPS ) and nitrogen adsorption-desorption analysis. Furthermore, influence of reduction and reduction temperature on the super-capacitive properties was investigated. It is found that the graphene paper fabricated at 150 ℃ exhibits high capacitive behavior and long charge/discharge cycle life at a current density of 1000 mA/g. The discharge capacitance of the material in an aqueous electrolyte of 6 mol/L KOH is 142 F/g and the capaci-tance retention is 99. 8% after 1000 charge/discharge cycles.

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