Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 10, Pages 1652-1655Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.08.020
Keywords
Supercapacitor; Electrochemical behavior; Activated carbon; Aqueous electrolyte; Na+; K+
Categories
Funding
- National Basic Research Program of China [2007CB209702]
- Shanghai Committee of Science and Technology
- Sanyo Chemical Industries, Ltd.
- Alexander von Humboldt Foundation
Ask authors/readers for more resources
The electrochemical performances of activated carbon (AC) in 0.5 mol/l Li2SO4, Na2SO4 and K2SO4 aqueous electrolytes were investigated. The cyclic voltammetric results at different scan rates show that the rate behaviors of AC in the three electrolytes improve in the order of Li2SO4 < Na2SO4 < K2SO4. This improvement can be mainly ascribed to the following two reasons: (I) the decreasing equivalent series resistance in the order of Li2SO4 > Na2SO4 > K2SO4, which is the main factor influencing the maximum output power, and (2) the increasing migration speed of hydrated ions in the bulk electrolyte and in the inner pores of AC electrode in the order of Li+ < Na+ < K+. Their cycling behaviors do not show any differences in capacitive fading. The above results provide valuable information to explore new hybrid supercapacitors. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available