Journal article
Electrodeposition of sea-urchin and cauliflower-like Ni/Co doped manganese dioxide hierarchical nanostructures with improved energy storage behavior
ChemElectroChem, Vol.3(6), pp.976-985
2016
Abstract
Transforming the existing Zn–MnO2 primary battery into a secondary battery with enhanced storage behavior and a low cost is of significant interest. Such technology could underpin future energy-storage development. To acquire this, doped electrolytic manganese dioxide (EMD) with hierarchical nanoarchitectures have been employed as a cathode in the Zn–MnO2 system. EMD is synthesized from manganese sulfate in a sulfuric acid bath with in situ doping of nickel and cobalt ions individually. Sea-urchin-shaped EMD has been obtained with nickel as a dopant, whereas cauliflower- and pyramidal-shaped hierarchical nanostructures are observed with cobalt as a dopant, using a facile galvanostatic method without employing any template or surfactant. The structural studies indicated that all EMD samples (in the absence and presence of dopants) are predominantly composed of gamma-type manganese dioxide; however, the peak intensity increased with increasing concentration of the dopants. The electrochemical results revealed that the Co-doped EMD composite played a crucial role in increasing the storage capacity of the Zn–MnO2 battery, whereas the Ni-doped EMD composite resulted in improved longevity compared the Co-doped and undoped counterparts. The EMD composites individually doped with Ni and Co resulted in improved storage behaviors of 395 and 670 mA h g−1, respectively, against the undoped sample which is 220 mA h g−1, implying that the presence of Co3O4 and mesoporous nanostructured surfaces enhanced the fast kinetics of electrochemical reactions.
Details
- Title
- Electrodeposition of sea-urchin and cauliflower-like Ni/Co doped manganese dioxide hierarchical nanostructures with improved energy storage behavior
- Authors/Creators
- M. Minakshi (Author/Creator) - Murdoch UniversityA. Biswal (Author/Creator) - Murdoch UniversityB. Tripathy (Author/Creator) - Institute of Minerals and Materials Technology
- Publication Details
- ChemElectroChem, Vol.3(6), pp.976-985
- Publisher
- Wiley
- Identifiers
- 991005544850107891
- Copyright
- © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.52 Electrode Materials
- Web Of Science research areas
- Electrochemistry
- ESI research areas
- Chemistry