The authors gratefully acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada.
Pulse Electrosynthesis of MnO2 Electrodes for Supercapacitors†
Article first published online: 28 MAR 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: Advanced Ceramics and Coating Processing
Volume 16, Issue 6, pages 760–766, June 2014
How to Cite
Su, Y. and Zhitomirsky, I. (2014), Pulse Electrosynthesis of MnO2 Electrodes for Supercapacitors. Adv. Eng. Mater., 16: 760–766. doi: 10.1002/adem.201400077
- Issue published online: 11 JUN 2014
- Article first published online: 28 MAR 2014
- Manuscript Received: 18 FEB 2014
- Manuscript Accepted: 17 FEB 2014
Experimental results on cathodic electrosynthesis of MnO2 electrodes for electrochemical supercapacitors are presented. The deposition yield data at different pulse durations and electrosynthesis mechanism are discussed. Electron microscopy investigations show porous structure of the electrodes, which is beneficial for good electrolyte access to the active material. The capacitance of 2.6 F cm–2 (199 F g–1), energy density of 20 Wh kg–1 and power density of 28 kW kg–1 are achieved for 13 mg cm–2 electrodes. The electrodes show improved capacitance retention at high scan rates. The Ni plaque-based MnO2 electrodes are promising for energy storage applications in electrochemical supercapacitors.