Preparation and Electrochemical Characterization of La Doping Co3O4 Super Capacitor Electrode Materials

DOI

10.2991/cmfe-15.2015.55How to use a DOI?

Keywords

Cobalt oxide; electrochemical performance; specific capacitance; Super Capacitor; Lanthanum

Abstract

An aqueous solution containing deionized water, cobalt nitrate hexahydrate (Co(NO3)2•6H2O), ethylene glycol (EG) and urea (NH2CONH2) were reacted in an autoclave with hydrothermal reaction method at 180 oC for 20 h to generate precursors with 0.1%, 0.2%, 0.3%, 0.4% and 0.5% of La (NO3)3. Then the precursor was decomposed to cobalt oxide powders at 300-500 oC for 2h. The morphology and electrochemical properties of samples were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical analyzer. The results suggested that the average crystallite size and fine crystallinity of Co3O4 crystal lattices increased with the mass percentage of La (NO3)3. Ethylene glycol as a shaping agent may be the possible reasons of decrease in particle size at higher temperatures in the process of the formation of Co3O4 microspheres. The specific capacitance and the current density of the best sample are 5 ma/s, 372.7 F/g and 10 ma/s, 310.56 F/g respectively.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Haifeng Chen
AU  - Dandan Zhan
PY  - 2015/07
DA  - 2015/07
TI  - Preparation and Electrochemical Characterization of La Doping Co3O4 Super Capacitor Electrode Materials
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 233
EP  - 236
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.55
DO  - 10.2991/cmfe-15.2015.55
ID  - Chen2015/07
ER  -