Abstract
Studies of the electrochemical behavior of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O in K{sub 2}SO{sub 4} show the reversible intercalation/deintercalation of K{sup +}-ions in the lattice. An asymmetric supercapacitor activated carbon (AC)/0.5 mol l{sup -1} K{sub 2}SO{sub 4}/K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O was assembled and tested successfully. It shows an energy density of 25.3 Wh kg{sup -1} at a power density of 140 W kg{sup -1}; at the same time it keeps a very good rate behavior with an energy density of 17.6 Wh kg{sup -1} at a power density of 2 kW kg{sup -1} based on the total mass of the active electrode materials, which is higher than that of AC/0.5 mol l{sup -1} Li{sub 2}SO{sub 4}/LiMn{sub 2}O{sub 4}. In addition, this asymmetric supercapacitor shows excellent cycling behavior without the need to remove oxygen from the electrolyte solution. This can be ascribed in part to the stability of the lamellar structure of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O. This asymmetric aqueous capacitor has great promise for practical applications due to high energy density at high power density. (author)
Qu, Qunting;
Li, Lei;
Tian, Shu;
Guo, Wenling;
Wu, Yuping;
[1]
Holze, Rudolf
[2]
- New Energy and Materials Laboratory (NEML), Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433 (China)
- Technische Universitaet Chemnitz, Institut fuer Chemie, D-09107 Chemnitz (Germany)
Citation Formats
Qu, Qunting, Li, Lei, Tian, Shu, Guo, Wenling, Wu, Yuping, and Holze, Rudolf.
A cheap asymmetric supercapacitor with high energy at high power: Activated carbon//K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O.
Netherlands: N. p.,
2010.
Web.
doi:10.1016/J.JPOWSOUR.2009.10.108.
Qu, Qunting, Li, Lei, Tian, Shu, Guo, Wenling, Wu, Yuping, & Holze, Rudolf.
A cheap asymmetric supercapacitor with high energy at high power: Activated carbon//K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O.
Netherlands.
https://doi.org/10.1016/J.JPOWSOUR.2009.10.108
Qu, Qunting, Li, Lei, Tian, Shu, Guo, Wenling, Wu, Yuping, and Holze, Rudolf.
2010.
"A cheap asymmetric supercapacitor with high energy at high power: Activated carbon//K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O."
Netherlands.
https://doi.org/10.1016/J.JPOWSOUR.2009.10.108.
@misc{etde_21253027,
title = {A cheap asymmetric supercapacitor with high energy at high power: Activated carbon//K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O}
author = {Qu, Qunting, Li, Lei, Tian, Shu, Guo, Wenling, Wu, Yuping, and Holze, Rudolf}
abstractNote = {Studies of the electrochemical behavior of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O in K{sub 2}SO{sub 4} show the reversible intercalation/deintercalation of K{sup +}-ions in the lattice. An asymmetric supercapacitor activated carbon (AC)/0.5 mol l{sup -1} K{sub 2}SO{sub 4}/K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O was assembled and tested successfully. It shows an energy density of 25.3 Wh kg{sup -1} at a power density of 140 W kg{sup -1}; at the same time it keeps a very good rate behavior with an energy density of 17.6 Wh kg{sup -1} at a power density of 2 kW kg{sup -1} based on the total mass of the active electrode materials, which is higher than that of AC/0.5 mol l{sup -1} Li{sub 2}SO{sub 4}/LiMn{sub 2}O{sub 4}. In addition, this asymmetric supercapacitor shows excellent cycling behavior without the need to remove oxygen from the electrolyte solution. This can be ascribed in part to the stability of the lamellar structure of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O. This asymmetric aqueous capacitor has great promise for practical applications due to high energy density at high power density. (author)}
doi = {10.1016/J.JPOWSOUR.2009.10.108}
journal = []
issue = {9}
volume = {195}
place = {Netherlands}
year = {2010}
month = {May}
}
title = {A cheap asymmetric supercapacitor with high energy at high power: Activated carbon//K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O}
author = {Qu, Qunting, Li, Lei, Tian, Shu, Guo, Wenling, Wu, Yuping, and Holze, Rudolf}
abstractNote = {Studies of the electrochemical behavior of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O in K{sub 2}SO{sub 4} show the reversible intercalation/deintercalation of K{sup +}-ions in the lattice. An asymmetric supercapacitor activated carbon (AC)/0.5 mol l{sup -1} K{sub 2}SO{sub 4}/K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O was assembled and tested successfully. It shows an energy density of 25.3 Wh kg{sup -1} at a power density of 140 W kg{sup -1}; at the same time it keeps a very good rate behavior with an energy density of 17.6 Wh kg{sup -1} at a power density of 2 kW kg{sup -1} based on the total mass of the active electrode materials, which is higher than that of AC/0.5 mol l{sup -1} Li{sub 2}SO{sub 4}/LiMn{sub 2}O{sub 4}. In addition, this asymmetric supercapacitor shows excellent cycling behavior without the need to remove oxygen from the electrolyte solution. This can be ascribed in part to the stability of the lamellar structure of K{sub 0.27}MnO{sub 2}.0.6H{sub 2}O. This asymmetric aqueous capacitor has great promise for practical applications due to high energy density at high power density. (author)}
doi = {10.1016/J.JPOWSOUR.2009.10.108}
journal = []
issue = {9}
volume = {195}
place = {Netherlands}
year = {2010}
month = {May}
}