Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/52853
Title: High-performance asymmetric supercapacitor based on CNT-graphene hybrid gel and MnO2-graphene hybrid gel
Authors: Bay, Alvin Koon Teck
Keywords: DRNTU::Engineering::Bioengineering
Issue Date: 2013
Abstract: Supercapacitors have been, in recent times, touted as the next highly anticipated form of energy storage devices to be watched due to their many potential applications and outstanding properties. Literatures have shown supercapacitors to possess excellent power and energy densities, high rate capability, long shelf live, and high cycling stability. In this report, the performance of supercapacitors, in particular asymmetric supercapacitors, will be evaluated. In theory, by utilizing two different composite materials, namely the carbon nanotube-graphene hybrid gel (CNT-GHG) and manganese oxide-graphene hybrid gel (MGHG), the asymmetric supercapacitor will be able to benefit from the advantageous properties that each of them can offer and mitigate weaknesses that the individual components have when operating independently. Various tests such as cyclic voltammetry (CV), galvanostatic charge-discharge techniques and field emission scanning electron microscopy (FESEM) have been used to characterize the materials and evaluate their performance. The energy and power densities obtained are 26.52 Wh kg-1 and 9.078 kW kg-1, respectively, which either surpass or are comparable with other asymmetric supercapacitors reported in literatures.
URI: http://hdl.handle.net/10356/52853
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
SCBE052.pdf
  Restricted Access
2.7 MBAdobe PDFView/Open

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.