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Graphene based Supercapacitors with Improved Specific Capacitance and Fast Charging Time at High Current Density

13 November 2013

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Graphene is a promising material for energy storage, especially for high performance
supercapacitors. For real time high power applications, it is critical to have high specific
capacitance with fast charging time at high current density. Using a modified Hummer’s method
and tip sonication for graphene synthesis, here we show graphene-based supercapacitors with
high stability and significantly-improved electrical double layer capacitance and energy density
with fast charging and discharging time at a high current density, due to enhanced ionic
electrolyte accessibility in deeper regions. 

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Publication Info

13 Nov. 2013 - PDF
Year: 2013
Type: Report / Study
Source: Research / Science
Language: English
File Size: 917 KB
Number of Pages: 25
Author(s):
Karthikeyan Kaliyappan (Faculty of Applied Chemical Engineering, Chonnam National University)
Santhakumar Kannappana (Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology)
Rajesh Kumar Manian (Department of Chemistry, Institute of Basic Science, Chonnam National University)
Amaresh Samuthira Pandian (Faculty of Applied Chemical Engineering, Chonnam National University)
Hao Yang (Department of Electrical and Computer Engineering, The Ohio State University)
Jae-Hyung Jang (Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology)
Wu Lu (Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology)