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Article: Advanced asymmetrical supercapacitors based on graphene hybrid materials

TitleAdvanced asymmetrical supercapacitors based on graphene hybrid materials
Authors
KeywordsAsymmetrical supercapacitor
energy storage
graphene
hybrid nanomaterials
Issue Date2011
Citation
Nano Research, 2011, v. 4, n. 8, p. 729-736 How to Cite?
AbstractSupercapacitors operating in aqueous solutions are low cost energy storage devices with high cycling stability and fast charging and discharging capabilities, but generally suffer from low energy densities. Here, we grow Ni(OH)2 nanoplates and RuO2 nanoparticles on high quality graphene sheets in order to maximize the specific capacitances of these materials. We then pair up a Ni(OH)2/graphene electrode with a RuO2/graphene electrode to afford a high performance asymmetrical supercapacitor with high energy and power density operating in aqueous solutions at a voltage of ~1.5 V. The asymmetrical supercapacitor exhibits significantly higher energy densities than symmetrical RuO2-RuO2 supercapacitors or asymmetrical supercapacitors based on either RuO2-carbon or Ni(OH)2-carbon electrode pairs. A high energy density of ~48 W·h/kg at a power density of ~0.23 kW/kg, and a high power density of ~21 kW/kg at an energy density of ~14 W·h/kg have been achieved with our Ni(OH)2/graphene and RuO2/graphene asymmetrical supercapacitor. Thus, pairing up metal-oxide/graphene and metal-hydroxide/graphene hybrid materials for asymmetrical supercapacitors represents a new approach to high performance energy storage. © 2011 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
Persistent Identifierhttp://hdl.handle.net/10722/334254
ISSN
2023 Impact Factor: 9.5
2023 SCImago Journal Rankings: 2.539
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Hailiang-
dc.contributor.authorLiang, Yongye-
dc.contributor.authorMirfakhrai, Tissaphern-
dc.contributor.authorChen, Zhuo-
dc.contributor.authorCasalongue, Hernan Sanchez-
dc.contributor.authorDai, Hongjie-
dc.date.accessioned2023-10-20T06:46:49Z-
dc.date.available2023-10-20T06:46:49Z-
dc.date.issued2011-
dc.identifier.citationNano Research, 2011, v. 4, n. 8, p. 729-736-
dc.identifier.issn1998-0124-
dc.identifier.urihttp://hdl.handle.net/10722/334254-
dc.description.abstractSupercapacitors operating in aqueous solutions are low cost energy storage devices with high cycling stability and fast charging and discharging capabilities, but generally suffer from low energy densities. Here, we grow Ni(OH)2 nanoplates and RuO2 nanoparticles on high quality graphene sheets in order to maximize the specific capacitances of these materials. We then pair up a Ni(OH)2/graphene electrode with a RuO2/graphene electrode to afford a high performance asymmetrical supercapacitor with high energy and power density operating in aqueous solutions at a voltage of ~1.5 V. The asymmetrical supercapacitor exhibits significantly higher energy densities than symmetrical RuO2-RuO2 supercapacitors or asymmetrical supercapacitors based on either RuO2-carbon or Ni(OH)2-carbon electrode pairs. A high energy density of ~48 W·h/kg at a power density of ~0.23 kW/kg, and a high power density of ~21 kW/kg at an energy density of ~14 W·h/kg have been achieved with our Ni(OH)2/graphene and RuO2/graphene asymmetrical supercapacitor. Thus, pairing up metal-oxide/graphene and metal-hydroxide/graphene hybrid materials for asymmetrical supercapacitors represents a new approach to high performance energy storage. © 2011 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.-
dc.languageeng-
dc.relation.ispartofNano Research-
dc.subjectAsymmetrical supercapacitor-
dc.subjectenergy storage-
dc.subjectgraphene-
dc.subjecthybrid nanomaterials-
dc.titleAdvanced asymmetrical supercapacitors based on graphene hybrid materials-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s12274-011-0129-6-
dc.identifier.scopuseid_2-s2.0-79961028582-
dc.identifier.volume4-
dc.identifier.issue8-
dc.identifier.spage729-
dc.identifier.epage736-
dc.identifier.eissn1998-0000-
dc.identifier.isiWOS:000293557500002-

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