Cobalt pyrophosphate nano/microstructures as promising electrode materials of supercapacitor

Cobalt pyrophosphate (Co 2 P 2 O 7 ) nano/microstructures (oblong plate, microplate, microflower, and hierarchical architectures) have been successfully synthesized through calcination of NH 4 CoPO 4 ·H 2 O nano/microstructures. More importantly, supercapacitive performances of Co 2 P 2 O 7 nano/mic...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2013-05, Vol.17 (5), p.1383-1391
Main Authors: Pang, Huan, Yan, Zhenzhen, Ma, Yahui, Li, Guochang, Chen, Jing, Zhang, Jiangshan, Du, Weimin, Li, Sujuan
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Original Paper
Physical Chemistry
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Summary:Cobalt pyrophosphate (Co 2 P 2 O 7 ) nano/microstructures (oblong plate, microplate, microflower, and hierarchical architectures) have been successfully synthesized through calcination of NH 4 CoPO 4 ·H 2 O nano/microstructures. More importantly, supercapacitive performances of Co 2 P 2 O 7 nano/microstructures were studied using cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy methods in 3.0 M KOH solution. These results show that Co 2 P 2 O 7 hierarchical architecture electrodes exhibit high specific capacitance of 367 F g −1 at current density of 0.625 A g −1 in aqueous KOH solution. Co 2 P 2 O 7 hierarchical architecture electrodes remain 96.2 % of the initial specific capacitance after 3,000 charge/discharge cycles.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-013-2007-5