Abstract
Cobalt pyrophosphate (Co2P2O7) nano/microstructures (oblong plate, microplate, microflower, and hierarchical architectures) have been successfully synthesized through calcination of NH4CoPO4·H2O nano/microstructures. More importantly, supercapacitive performances of Co2P2O7 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 Co2P2O7 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. Co2P2O7 hierarchical architecture electrodes remain 96.2 % of the initial specific capacitance after 3,000 charge/discharge cycles.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (NSFC 21201010, 21071006, and 21105002), Science and Technology Foundation of Henan Province (122102210253), and China Postdoctoral Science Foundation (2012M521115).
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Pang, H., Yan, Z., Ma, Y. et al. Cobalt pyrophosphate nano/microstructures as promising electrode materials of supercapacitor. J Solid State Electrochem 17, 1383–1391 (2013). https://doi.org/10.1007/s10008-013-2007-5
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DOI: https://doi.org/10.1007/s10008-013-2007-5