A general strategy for the fabrication of high performance microsupercapacitors

Handle URI:
http://hdl.handle.net/10754/556515
Title:
A general strategy for the fabrication of high performance microsupercapacitors
Authors:
Kurra, Narendra ( 0000-0002-0916-7902 ) ; Jiang, Qiu; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
We propose a generic strategy for microsupercapacitor fabrication that integrates layers of reduced graphene oxide (rGO) and pseudocapacitive materials to create electrode heterostructures with significantly improved cycling stability and performance. Our approach involves a combination of photolithography and a simple transfer method of free-standing reduced graphene oxide film onto an Au/patterned photoresist bilayer. The resulting stack (rGO/Au/patterned resist/substrate) is then used for the electrochemical deposition of various pseudocapacitive materials before the final step of lift-off. To prove the viability of this method, we have successfully fabricated microsupercapacitors (MSCs) with the following interdigitated electrode heterostructures: MnO2/rGO, Co(OH)2/rGO and PANI/rGO. These MSCs show better performance and cycling stability compared to the single layer, (i.e., rGO-free) counterparts. The interdigitated electrode heterostructures result in MSCs with energy densities in the range of 3–12 mW h/cm3 and power densities in the range of 400–1200 mW/cm3, which is superior to the Li thin film batteries (E=10 mW h/cm3), carbon, and metal oxide based MSCs (E=1–6 mW h/cm3) while device energy densities are in the range of 1.3–5.3 mW h/cm3, corresponding power densities are in the range of 178–533 mW/cm3. These results can be explained by a facilitated nucleation model, where surface topology of the rGO film creates a favorable environment for the nucleation and growth of pseudocapacitive materials with strong interfacial contacts and enhanced surface area. This approach opens up a new avenue in fabricating MSCs involving a variety of heterostructures combining electrical double layer carbon type with Faradaic pseudocapacitive materials for enhanced electrochemical performance.
KAUST Department:
Materials Science and Engineering Program
Citation:
A general strategy for the fabrication of high performance microsupercapacitors 2015 Nano Energy
Journal:
Nano Energy
Issue Date:
4-Jun-2015
DOI:
10.1016/j.nanoen.2015.05.031
Type:
Article
ISSN:
22112855
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S2211285515002475
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorKurra, Narendraen
dc.contributor.authorJiang, Qiuen
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2015-06-07T21:42:54Zen
dc.date.available2015-06-07T21:42:54Zen
dc.date.issued2015-06-04en
dc.identifier.citationA general strategy for the fabrication of high performance microsupercapacitors 2015 Nano Energyen
dc.identifier.issn22112855en
dc.identifier.doi10.1016/j.nanoen.2015.05.031en
dc.identifier.urihttp://hdl.handle.net/10754/556515en
dc.description.abstractWe propose a generic strategy for microsupercapacitor fabrication that integrates layers of reduced graphene oxide (rGO) and pseudocapacitive materials to create electrode heterostructures with significantly improved cycling stability and performance. Our approach involves a combination of photolithography and a simple transfer method of free-standing reduced graphene oxide film onto an Au/patterned photoresist bilayer. The resulting stack (rGO/Au/patterned resist/substrate) is then used for the electrochemical deposition of various pseudocapacitive materials before the final step of lift-off. To prove the viability of this method, we have successfully fabricated microsupercapacitors (MSCs) with the following interdigitated electrode heterostructures: MnO2/rGO, Co(OH)2/rGO and PANI/rGO. These MSCs show better performance and cycling stability compared to the single layer, (i.e., rGO-free) counterparts. The interdigitated electrode heterostructures result in MSCs with energy densities in the range of 3–12 mW h/cm3 and power densities in the range of 400–1200 mW/cm3, which is superior to the Li thin film batteries (E=10 mW h/cm3), carbon, and metal oxide based MSCs (E=1–6 mW h/cm3) while device energy densities are in the range of 1.3–5.3 mW h/cm3, corresponding power densities are in the range of 178–533 mW/cm3. These results can be explained by a facilitated nucleation model, where surface topology of the rGO film creates a favorable environment for the nucleation and growth of pseudocapacitive materials with strong interfacial contacts and enhanced surface area. This approach opens up a new avenue in fabricating MSCs involving a variety of heterostructures combining electrical double layer carbon type with Faradaic pseudocapacitive materials for enhanced electrochemical performance.en
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S2211285515002475en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Nano Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nano Energy, 4 June 2015. DOI: 10.1016/j.nanoen.2015.05.031en
dc.subjectMicropseudocapacitorsen
dc.subjectHeterostructuresen
dc.subjectReduced graphene oxideen
dc.subjectReduced graphene oxideen
dc.subjectConducting polymeren
dc.subjectIn-planeen
dc.titleA general strategy for the fabrication of high performance microsupercapacitorsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalNano Energyen
dc.eprint.versionPost-printen
kaust.authorKurra, Narendraen
kaust.authorAlshareef, Husam N.en
kaust.authorJiang, Qiuen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.