Annealing environment effects on the electrochemical behavior of supercapacitors using Ni foam current collectors

Show simple item record Jadhav, Vijaykumar V. Kore, Rohan Maruti Thorat, Nanasaheb D. Yun, Je Moon Kim, Kwang Ho Mane, Rajaram S. O'Dwyer, Colm 2018-09-12T08:48:36Z 2018-09-12T08:48:36Z 2018-09
dc.identifier.citation Jadhav, V., Kore, R., Mane, R., Thorat, N. and O'Dwyer, C. (2018) 'Annealing Environment Effects on the Electrochemical Behavior of Supercapacitors using Ni Foam Current Collectors', Materials Research Express, In Press, doi: 10.1088/2053-1591/aadedb en
dc.identifier.startpage 1 en
dc.identifier.endpage 21 en
dc.identifier.issn 2053-1591
dc.identifier.doi 10.1088/2053-1591/aadedb
dc.description.abstract Nickel (Ni) foam-based symmetric/asymmetric electrochemical supercapacitors benefit from a randomly 3D structured porous geometry that functions as an active material support and as a current collector. The surface composition stability and consistency of the current collector are critical for maintaining and consistency supercapacitor response, especially for various mass loading and mass coverage. Here we detail some annealing environment conditions that change the surface morphology, chemistry and electrochemical properties of Ni foam by NiO formation. Air-annealing at 400 and 800 °C and annealing also in N2 and Ar at 800°C result in the in-situ and ex-situ formation of NiO on the Ni foam (NiO@Ni). Oxidation of Ni to NiO by several mechanisms in the air and inert atmospheres to form a NiO coating is subsequently examined in supercapacitors, where the electrochemical conversion through Ni(OH)2 and NiOOH phases influence the charge storage process. In parallel, the grain boundary density reduction by annealing improves the electronic conductivity of the foam current collector. The majority of stored charge occurs at the oxidized Ni-electrolyte interface. The changes to the Ni metal surface that can be caused by chemical environments, heating and high temperatures that typically occur when other active materials are grown on Ni directly, should be considered in the overall response of the electrode, and this may be general for metallic current collectors and foams that can oxidize at elevated temperatures and become electrochemically active. en
dc.description.sponsorship Irish Research Council (IRC Government of Ireland Postdoctoral fellowship award under contract GOIPD/2016/575) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher IOP Publishing en
dc.rights © 2018 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Materials Research Express. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at en
dc.subject Nickel foam en
dc.subject NiO en
dc.subject Annealing en
dc.subject Oxidation en
dc.subject Electrochemistry en
dc.subject Supercapacitor en
dc.title Annealing environment effects on the electrochemical behavior of supercapacitors using Ni foam current collectors en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en Access to this article is restricted until 12 months after publication by request of the publisher. en 2019-09-04 2018-09-11T14:50:25Z
dc.description.version Accepted Version en
dc.internal.rssid 453061664
dc.contributor.funder Irish Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Materials Research Express en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en
dc.internal.bibliocheck In Press Sept 2018. Update citation details, page end page, add vol, issue, sn

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