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Synthesis and characterization of activated 3D graphene via catalytic growth and chemical activation for electrochemical energy storage in supercapacitors
dc.creator | Li B., Li Z., Pang Q., Zhuang Q., Zhu J., Tsiakaras P., Shen P.K. | en |
dc.date.accessioned | 2023-01-31T08:50:06Z | |
dc.date.available | 2023-01-31T08:50:06Z | |
dc.date.issued | 2019 | |
dc.identifier | 10.1016/j.electacta.2019.134878 | |
dc.identifier.issn | 00134686 | |
dc.identifier.uri | http://hdl.handle.net/11615/75795 | |
dc.description.abstract | Activated three-dimensional graphene (3D-AGE) powders with high specific surface area have been successfully prepared by combined strategies of catalytic growth and chemical activation for application in supercapacitors. The morphology, structure and composition of 3D-AGE are investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption-desorption and X-ray photoelectron spectroscopy (XPS). The electrochemical performance is evaluated by cyclic voltammetry (CV), galvanostatic charge-discharge (GDC) and electrochemical impedance spectroscopy (EIS). The results show that the 3D-AGE exhibits very high specific capacitance and stability as electrode material for supercapacitor in 1 mol L−1 KOH aqueous electrolyte. It is found that at a current density of 1 A g−1, the specific capacitance of 3D-AGE is 258.2 F g−1, which is much higher than the one (87.8 F g−1) of pristine 3D graphene (3D-GE). It is also found that after 2000 charge-discharge cycles, the specific capacitance increases from 285.2 to 345.3 F g−1, with an impressive increment rate of up to 21%. The excellent electrochemical performance of 3D-AGE can be attributed to its unique 3D nanostructure with high surface area, abundant oxygen functional groups, as well as fast ion and electron transport rates. © 2019 Elsevier Ltd | en |
dc.language.iso | en | en |
dc.source | Electrochimica Acta | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072281796&doi=10.1016%2fj.electacta.2019.134878&partnerID=40&md5=04b50cf1ece623938c3f91280be52fdc | |
dc.subject | Activation energy | en |
dc.subject | Capacitance | en |
dc.subject | Chemical activation | en |
dc.subject | Cyclic voltammetry | en |
dc.subject | Electric discharges | en |
dc.subject | Electrochemical electrodes | en |
dc.subject | Electrolytes | en |
dc.subject | Electron transport properties | en |
dc.subject | Energy storage | en |
dc.subject | Gas adsorption | en |
dc.subject | Graphene | en |
dc.subject | High resolution transmission electron microscopy | en |
dc.subject | Morphology | en |
dc.subject | Potassium hydroxide | en |
dc.subject | Scanning electron microscopy | en |
dc.subject | Storage (materials) | en |
dc.subject | Supercapacitor | en |
dc.subject | X ray photoelectron spectroscopy | en |
dc.subject | 3D graphene | en |
dc.subject | Catalytic growth | en |
dc.subject | Electrochemical energy storage | en |
dc.subject | Electrochemical performance | en |
dc.subject | Galvanostatic charge discharges | en |
dc.subject | Nitrogen adsorption desorption | en |
dc.subject | Synthesis and characterizations | en |
dc.subject | Three-dimensional graphene | en |
dc.subject | Electrochemical impedance spectroscopy | en |
dc.subject | Elsevier Ltd | en |
dc.title | Synthesis and characterization of activated 3D graphene via catalytic growth and chemical activation for electrochemical energy storage in supercapacitors | en |
dc.type | journalArticle | en |
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