Citation:
LUO Min, DING Xiao-Yi, DOU Yuan-Yun, ZHAO Liang, LIANG Bin, LIANG Jun. Influence of the Sulfuric Acid Dehydration Process on the Performance of Graphene-based Supercapacitors[J]. Chinese Journal of Inorganic Chemistry,
;2015, (1): 54-60.
doi:
10.11862/CJIC.2015.029
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The multilayer dehydrated reduced graphenes oxide (DRGO) were prepared by a simple and fast treatment of graphene oxide(GO) with sulfuric acid and were used as electrode materials for supercapacitor. Areduction process was devised through a two-step reduction of graphene oxide: first in aqueous sulfuric acid and then in concentrated sulfuric acid at 70 ℃, 30 min. The results showed that the type, amount of oxygen functionalities and newly formed sp2 domains were different for one-pot and two-step reduction of graphene oxide. The high reduction degree DRGOelectrode with less restacked layers and smaller size sp2 domains exhibits a high specific capacitance of 321.8 F·g-1 at a scan rate of 10 mV·s-1, and an excellent cycling stability along with 89.7% specific capacitane retained after 1000 cycle tests. This facile and low cost method makes the DRGOa potential candidate in applications of electrochemical capacitors.
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