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dc.contributor.authorKamali, Ali Rezaen
dc.date.accessioned2015-12-16T13:11:31Z
dc.date.available2015-12-16T13:11:31Z
dc.date.issued2015-12-17en
dc.identifier.citationKamali. Green Chemistry (2015) Vol. 18, pp. 1952-1964. doi:10.1039/C5GC02455Ben
dc.identifier.issn1463-9262
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/252995
dc.description.abstractLarge scale production of low cost and high quality graphene from abundant raw materials using eco-friendly methods is a critical step towards the widespread and sustainable use of this so-called “wonder material”. This paper for the first time reports a single step molten salt electrochemical method for the high yield preparation of graphene nanosheets having all the characteristics mentioned above. This process uses readily available commercial graphite electrodes as the carbon source which is both abundant and cheap. Surprisingly, apart from graphite, the other consumables are H2 and electricity, and no by product is produced. This method is not only eco-friendly but also very efficient. It offers a production rate of 450 g graphene per litre of molten salt per day. A molten salt volume of 10L should be able to produce 4.5kg graphene in a day. The graphene product showed a high conductivity of 5.8 × 10^5 S m^-1. The bench-scale production of high quality graphene, on a scale of tens of grams, was achieved using a novel two working electrode electrolysis cell, operating at a current density of about 1 A cm^-1 which is at least an order of magnitude higher than any other electrochemical exfoliation method which has been used so far for the preparation of graphene. The mechanism involved in the process is discussed. The graphene nanosheets showed a high oxidation temperature of 663°C when heated in air at 40°C min^-1. A simple and green strategy was developed to anchor SnO_2 nanocystals on the graphene nanosheets, and the lithium storage performance of the composite obtained was investigated. The composite displayed a high and stable lithium capacity of 1016 mAh g^-1 after 100 cycles of lithiation and de-lithiation.
dc.languageEnglishen
dc.language.isoenen
dc.publisherRoyal Society of Chemistry
dc.rightsAttribution 2.0 UK: England & Wales
dc.rights.urihttp://creativecommons.org/licenses/by/2.0/uk/
dc.titleEco-friendly production of high quality low cost graphene and its application in lithium ion batteriesen
dc.typeArticle
dc.description.versionThis is the final version of the article. It first appeared from the Royal Society of Chemistry via http://dx.doi.org/10.1039/C5GC02455Ben
prism.endingPage1964
prism.publicationDate2015en
prism.publicationNameGreen Chemistryen
prism.startingPage1952
prism.volume18en
rioxxterms.versionofrecord10.1039/C5GC02455Ben
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-12-17en
dc.identifier.eissn1463-9270
rioxxterms.typeJournal Article/Reviewen
cam.orpheus.successThu Jan 30 12:55:29 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2300-01-01


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Attribution 2.0 UK: England & Wales
Except where otherwise noted, this item's licence is described as Attribution 2.0 UK: England & Wales