Growth of polypyrrole nanostructures through reactive templates for energy storage applications
Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia)
Cabán Huertas, Zahilia (Institut Català de Nanociència i Nanotecnologia)
Holze, Rudolf (Technische Universität Chemnitz. AG Elektrochemie)
Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)

Data:	2016
Resum:	This work presents a facile reactive template route to prepare polypyrrole (PPy) with a given, chosen nanostructure among three different morphologies (i. e. , nanotubes, nanofibers and urchins). This approach exploits the variability of MnO morphologies and its versatility as sacrificial template. The morphological evolution for this template-assisted growth of PPy nanostructures has been briefly explained. These unique architectures significantly enhance the electroactive surface area of the PPy nanostructures, leading to better interfacial/chemical distribution at the nanoscale, fast ion and electron transfer and good strain accommodation. Thus, when used as supercapacitor electrodes, a maximum specific capacitance of 604 F/g at a current density of 1. 81 A/g was reached for PPy nanofibers. Even after more than 1000 cycles at 9 A/g, a capacitance of 259 F/g with 91% retention was achieved. Moreover, the same PPy nanofibers can be used as cathode material for lithium-ion batteries (LIBs), showing a capacity of 70. 82 mAh/g at a rate of 0. 10 C with good cycling stability and rate capability. Our results provide sound evidences that PPy nanostructures can be properly tuned and make the difference for the practical application of these materials in electrochemical energy storage devices.
Ajuts:	Ministerio de Economía y Competitividad SEV-2013-0295
Nota:	Altres ajuts: Authors appreciate the award to DPD with the support of the Secretary for Universities and Research of the Ministry of Economy and Knowledge of the Government of Catalonia and the Co-fund programme of the Marie Curie Actions of the 7th R&D Framework Programme of the European Union" and the award of Humboldt Fellowship of the Alexander von Humboldt Foundation (AvH), Germany.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Polypyrrole ; Nanostructures ; Supercapacitors ; Li-ion battery
Publicat a:	Electrochimica acta, Vol. 191 (Feb. 2016) , p. 346-354, ISSN 1873-3859

DOI: 10.1016/j.electacta.2016.01.078

Postprint 36 p, 2.1 MB

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