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Title: Hydrothermal self-assembly and supercapacitive behaviors of Co(II) ion-modified graphene aerogels in H{sub 2}SO{sub 4} electrolyte

Abstract

Highlights: • 3D Co(II) ions modified graphene aerogels were prepared by one-step hydrothermal process. • The aerogel electrodes showed hybrid supercapacitor behaviors. • The aerogel electrodes exhibited high rate capability and long-term cycling stability. - Abstract: Reduced graphene oxide (r-GO) aerogels decorated with divalent cobalt ions were synthesized via a one-pot hydrothermal self-assembly route. The interaction of Co(II) ions with 3D r-GO aerogels was investigated by spectroscopic techniques, including Raman, attenuated total reflectance infrared, and X-ray photoelectron spectroscopies. The excellent electrochemical properties of the aerogels were confirmed by cyclic voltammetry, galvanostatic charge/discharge tests, and electrochemical impedance spectroscopy in an acid electrolyte (1 M H{sub 2}SO{sub 4}). The Co(II) ion-modified r-GO aerogels can be used as high-performance hybrid supercapacitor materials with a specific capacitance of 387.2 F g{sup –1} at 1 A g{sup –1} current density and a good cycling stability without capacity decay over 1000 cycles. The mechanical integrity enhancement of the hybrid r-GO aerogel framework and the improvement in its unique capacitive performance are attributed to the efficient interconnection produced by electro-active Co(II) ions.

Authors:
 [1];  [2];  [1]
  1. Department of Systems Engineering and Engineering Management, City University of Hong Kong, Hong Kong (China)
  2. Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071 (China)
Publication Date:
OSTI Identifier:
22420532
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 56; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CAPACITANCE; COBALT IONS; CURRENT DENSITY; ELECTROCHEMISTRY; ELECTRODES; ELECTROLYTES; GRAPHENE; IMPEDANCE; INFRARED SPECTRA; RAMAN SPECTROSCOPY; SPECTRAL REFLECTANCE; SULFURIC ACID; VOLTAMETRY; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Bao, Qi, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Hui, K.N., E-mail: bizhui@pusan.ac.kr, Hui, K.S., E-mail: kshui@hanyang.ac.kr, Wang, Yi, and Hong, Xiaoting. Hydrothermal self-assembly and supercapacitive behaviors of Co(II) ion-modified graphene aerogels in H{sub 2}SO{sub 4} electrolyte. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2014.04.026.
Bao, Qi, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Hui, K.N., E-mail: bizhui@pusan.ac.kr, Hui, K.S., E-mail: kshui@hanyang.ac.kr, Wang, Yi, & Hong, Xiaoting. Hydrothermal self-assembly and supercapacitive behaviors of Co(II) ion-modified graphene aerogels in H{sub 2}SO{sub 4} electrolyte. United States. doi:10.1016/J.MATERRESBULL.2014.04.026.
Bao, Qi, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Hui, K.N., E-mail: bizhui@pusan.ac.kr, Hui, K.S., E-mail: kshui@hanyang.ac.kr, Wang, Yi, and Hong, Xiaoting. Fri . "Hydrothermal self-assembly and supercapacitive behaviors of Co(II) ion-modified graphene aerogels in H{sub 2}SO{sub 4} electrolyte". United States. doi:10.1016/J.MATERRESBULL.2014.04.026.
@article{osti_22420532,
title = {Hydrothermal self-assembly and supercapacitive behaviors of Co(II) ion-modified graphene aerogels in H{sub 2}SO{sub 4} electrolyte},
author = {Bao, Qi and Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071 and Hui, K.N., E-mail: bizhui@pusan.ac.kr and Hui, K.S., E-mail: kshui@hanyang.ac.kr and Wang, Yi and Hong, Xiaoting},
abstractNote = {Highlights: • 3D Co(II) ions modified graphene aerogels were prepared by one-step hydrothermal process. • The aerogel electrodes showed hybrid supercapacitor behaviors. • The aerogel electrodes exhibited high rate capability and long-term cycling stability. - Abstract: Reduced graphene oxide (r-GO) aerogels decorated with divalent cobalt ions were synthesized via a one-pot hydrothermal self-assembly route. The interaction of Co(II) ions with 3D r-GO aerogels was investigated by spectroscopic techniques, including Raman, attenuated total reflectance infrared, and X-ray photoelectron spectroscopies. The excellent electrochemical properties of the aerogels were confirmed by cyclic voltammetry, galvanostatic charge/discharge tests, and electrochemical impedance spectroscopy in an acid electrolyte (1 M H{sub 2}SO{sub 4}). The Co(II) ion-modified r-GO aerogels can be used as high-performance hybrid supercapacitor materials with a specific capacitance of 387.2 F g{sup –1} at 1 A g{sup –1} current density and a good cycling stability without capacity decay over 1000 cycles. The mechanical integrity enhancement of the hybrid r-GO aerogel framework and the improvement in its unique capacitive performance are attributed to the efficient interconnection produced by electro-active Co(II) ions.},
doi = {10.1016/J.MATERRESBULL.2014.04.026},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 56,
place = {United States},
year = {2014},
month = {8}
}