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dc.contributor.author양철민-
dc.contributor.author김창효-
dc.contributor.author위재형-
dc.contributor.author황현태-
dc.contributor.author한종훈-
dc.date.accessioned2021-06-09T04:22:23Z-
dc.date.available2021-06-09T04:22:23Z-
dc.date.issued2019-09-
dc.identifier.citationVOL 489-716-
dc.identifier.issn0169-4332-
dc.identifier.other52935-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/69567-
dc.description.abstractThe low density of porous carbon nanomaterials for supercapacitor electrodes has limited their widespread application, despite their ultra-high gravimetric capacitance. In this work, we successfully prepared highly densified composite electrodes of graphene and single-walled carbon nanohorns (SWCNHs) using a simple spray-drying method that is suitable for mass production. To prepare the high-density composite electrodes, water-based mixtures of oxidized SWCNHs (NHOs) and graphene oxides (GOs) were spray-dried in heated air-
dc.description.abstractafter spray-drying, GOs dispersed in water were agglomerated in spherical clusters containing NHO nanoparticles. The reduced spray-dried GO/NHO (rS-GO/NHO) composite electrodes exhibited an extremely high bulk density of 1.23&#8239-
dc.description.abstractg·cm&#8722-
dc.description.abstract3, which is almost double that of commercial activated carbon (AC) and reduced NHO (r-NHO) electrodes, and three times higher than that of rS-GO electrodes. Of the materials tested, the rS-GO/NHO composite electrode had the highest volumetric capacitance (80&#8239-
dc.description.abstractF·cm&#8722-
dc.description.abstract3 at 1&#8239-
dc.description.abstractmA·cm&#8722-
dc.description.abstract2) and a low sheet resistance (0.005&#8239-
dc.description.abstractΩ· sq.&#8722-
dc.description.abstract1), which are far superior to those of commercial AC (57&#8239-
dc.description.abstract2 and 0.293&#8239-
dc.description.abstractΩ·sq.&#8722-
dc.description.abstract1, respectively), without the need for a conductive material, such as carbon black. We expect that these high-density graphene/SWCNH composite electrodes with high volumetric capacitances can be substituted for commercial AC materials in energy storage devices, such as supercapacitors.-
dc.publisherApplied surface science-
dc.subjectGraphene-
dc.subjectSingle-walled carbon nanohorn-
dc.subjectSpray-drying process-
dc.subjectSupercapacitor-
dc.subjectElectrode bulk density-
dc.subjectVolumetric capacitance-
dc.titleHigh-density graphene/single-walled carbon nanohorn composite supercapacitor electrode with high volumetric capacitance-
dc.typeArticle-
dc.relation.page708716-
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