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 shu

Influence of the Sulfuric Acid Dehydration Process on the Performance of Graphene-based Supercapacitors

1.
School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China

Corresponding author: LUO Min,
Received Date: 14 June 2014
Available Online: 10 September 2014
Fund Project: 国家自然科学基金(No.21361020) (No.21361020)宁夏自然科学基金资助项目(No.NZ12156) (No.NZ12156)中国科学院大连化学物理研究所催化基础国家重点实验室开放课题研究基金(N-09-13) (N-09-13)宁夏大学提升综合实力建设项目(No.8016-18)资助项目 (No.8016-18)

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.
- multilayer grapheme;concentrated sulfuric acid;dehydration;ring-opening reaction;supercapacitor
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