Graphene quantum dots as the electrolyte for solid state supercapacitors
We propose that graphene quantum dots (GQDs) with a sufficient number of acidic oxygen-bearing functional groups such as -COOH and -OH can serve as solution- and solid- type electrolytes for supercapacitors. Moreover, we found that the ionic conductivity and ion-donating ability of the GQDs could be...
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| Veröffentlicht in: | Scientific reports 2016-01, Vol.6 (1), p.19292-19292, Article 19292 |
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| creator | Zhang, Su Li, Yutong Song, Huaihe Chen, Xiaohong Zhou, Jisheng Hong, Song Huang, Minglu |
| description | We propose that graphene quantum dots (GQDs) with a sufficient number of acidic oxygen-bearing functional groups such as -COOH and -OH can serve as solution- and solid- type electrolytes for supercapacitors. Moreover, we found that the ionic conductivity and ion-donating ability of the GQDs could be markedly improved by simply neutralizing their acidic functional groups by using KOH. These neutralized GQDs as the solution- or solid-type electrolytes greatly enhanced the capacitive performance and rate capability of the supercapacitors. The reason for the enhancement can be ascribed to the fully ionization of the weak acidic oxygen-bearing functional groups after neutralization. |
| doi_str_mv | 10.1038/srep19292 |
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Moreover, we found that the ionic conductivity and ion-donating ability of the GQDs could be markedly improved by simply neutralizing their acidic functional groups by using KOH. These neutralized GQDs as the solution- or solid-type electrolytes greatly enhanced the capacitive performance and rate capability of the supercapacitors. The reason for the enhancement can be ascribed to the fully ionization of the weak acidic oxygen-bearing functional groups after neutralization.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/srep19292</identifier><identifier>PMID: 26763275</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>140/131 ; 140/146 ; 639/301/299/161/891 ; 639/925/918/1052 ; Electrolytes ; Humanities and Social Sciences ; Ionization ; Ions ; multidisciplinary ; Neutralization ; Oxygen ; Quantum dots ; Science</subject><ispartof>Scientific reports, 2016-01, Vol.6 (1), p.19292-19292, Article 19292</ispartof><rights>The Author(s) 2016</rights><rights>Copyright Nature Publishing Group Jan 2016</rights><rights>Copyright © 2016, Macmillan Publishers Limited 2016 Macmillan Publishers Limited</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c438t-320e86e86a43f578c95eeee645622b7a9263d10c573488474c78140b4c3af9203</citedby><cites>FETCH-LOGICAL-c438t-320e86e86a43f578c95eeee645622b7a9263d10c573488474c78140b4c3af9203</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4725872/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4725872/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,27903,27904,41099,42168,51554,53769,53771</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26763275$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhang, Su</creatorcontrib><creatorcontrib>Li, Yutong</creatorcontrib><creatorcontrib>Song, Huaihe</creatorcontrib><creatorcontrib>Chen, Xiaohong</creatorcontrib><creatorcontrib>Zhou, Jisheng</creatorcontrib><creatorcontrib>Hong, Song</creatorcontrib><creatorcontrib>Huang, Minglu</creatorcontrib><title>Graphene quantum dots as the electrolyte for solid state supercapacitors</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>We propose that graphene quantum dots (GQDs) with a sufficient number of acidic oxygen-bearing functional groups such as -COOH and -OH can serve as solution- and solid- type electrolytes for supercapacitors. 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| subjects | 140/131 140/146 639/301/299/161/891 639/925/918/1052 Electrolytes Humanities and Social Sciences Ionization Ions multidisciplinary Neutralization Oxygen Quantum dots Science |
| title | Graphene quantum dots as the electrolyte for solid state supercapacitors |
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