Self-assembled Prussian blue–polypyrrole nanocomposites for energy storage application

The Prussian blue and polypyrrole nanocomposite (PB–PPy) was synthesised by a facile spontaneous self-assembly (SA) procedure through the layering of multiple sequential absorptions of FeCl 3 –K 3 [Fe(CN) 6 ] and pyrrole. The morphology of PB–PPy nanocomposite was rough and irregular, whereas the PB...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2019-06, Vol.49 (6), p.631-638
Main Authors: Lee, Pui Kee, Nia, Pooria Moozarm, Woi, Pei Meng
Format: Article
Language:English
Subjects:
Capacitance
Capacitors
Chemistry
Chemistry and Materials Science
Electrochemical analysis
Electrochemistry
Energy storage
Ferric chloride
Industrial Chemistry/Chemical Engineering
Iron chlorides
Knee
Morphology
Nanocomposites
Nyquist plots
Physical Chemistry
Pigments
Polypyrroles
Potassium ferricyanide
Self-assembly
Short Communication
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Summary:The Prussian blue and polypyrrole nanocomposite (PB–PPy) was synthesised by a facile spontaneous self-assembly (SA) procedure through the layering of multiple sequential absorptions of FeCl 3 –K 3 [Fe(CN) 6 ] and pyrrole. The morphology of PB–PPy nanocomposite was rough and irregular, whereas the PB nanocubes (used as experimental control) had a diameter of about 40 nm which were formed using the SA method. The intercalation pseudocapacitive mechanism occurs when potassium ions were inserted to the PB framework. The electrochemical behaviour and areal capacitance of PB–PPy were compared with pristine PB. The “knee frequency” was only present in the Nyquist plot of PB–PPy. The result revealed that the PPy significantly improved the capacitance of pristine PB and this made PB–PPy as a promising candidate for supercapacitors. The specific areal capacitance of PB–PPy was at least ten times higher than pristine PB. Graphical abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-019-01310-5