Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
180810 | Electrochemistry Communications | 2010 | 4 Pages |
Abstract
Hydrous vanadium oxide (denoted as VOx·yH2O) deposited at 0.4 V shows promising capacitive behavior in aqueous media containing concentrated Li ions. VOx·yH2O annealed in air at 300 °C for 1 h shows highly reversible Li-ion intercalation/de-intercalation behavior with specific capacitance reaching ca. 737 and 606 F g− 1 at 25 and 500 mV s− 1 in 12 M LiCl between −0.2 and 0.8 V. In 14 M LiCl, retention of specific capacitance is about 95% when the scan rate is increased from 25 to 500 mV s− 1. This work is the first report showing the ultrahigh rate of Li-ion intercalation/de-intercalation in VOx·yH2O. A so-called Li-ion supercapacitor of the asymmetric type consisting of a VOx.yH2O cathode and a WO3.zH2O anode is proposed here.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Jing-Mei Li, Kuo-Hsin Chang, Chi-Chang Hu,