2024-03-29T13:56:04Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1595612020-12-10T16:20:12Zcom_10261_10252com_10261_3col_10261_10253
2018-01-24T11:59:47Z
urn:hdl:10261/159561
Growth of polypyrrole nanostructures through reactive templates for energy storage applications
Dubal, Deepak P.
Caban-Huertas, Zahilia
Holze, Rudolf
Gómez-Romero, P.
Generalitat de Catalunya
European Commission
Alexander von Humboldt Foundation
Ministerio de Economía y Competitividad (España)
Li-ion battery
Nanostructures
Polypyrrole
Supercapacitors
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.
2018-01-24T11:59:47Z
2018-01-24T11:59:47Z
2016
2018-01-24T11:59:47Z
artículo
Electrochimica Acta 191: 346-354 (2016)
http://hdl.handle.net/10261/159561
10.1016/j.electacta.2016.01.078
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100002809
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/100005156
eng
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2013-0295
closedAccess
Elsevier