Fractal Electrochemical Microsupercapacitors

Handle URI:
http://hdl.handle.net/10754/625995
Title:
Fractal Electrochemical Microsupercapacitors
Authors:
Hota, Mrinal Kanti ( 0000-0003-4336-8051 ) ; Jiang, Qiu; Mashraei, Yousof; Salama, Khaled N. ( 0000-0001-7742-1282 ) ; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
The first successful fabrication of microsupercapacitors (μ-SCs) using fractal electrode designs is reported. Using sputtered anhydrous RuO thin-film electrodes as prototypes, μ-SCs are fabricated using Hilbert, Peano, and Moore fractal designs, and their performance is compared to conventional interdigital electrode structures. Microsupercapacitor performance, including energy density, areal and volumetric capacitances, changes with fractal electrode geometry. Specifically, the μ-SCs based on the Moore design show a 32% enhancement in energy density compared to conventional interdigital structures, when compared at the same power density and using the same thin-film RuO electrodes. The energy density of the Moore design is 23.2 mWh cm at a volumetric power density of 769 mW cm. In contrast, the interdigital design shows an energy density of only 17.5 mWh cm at the same power density. We show that active electrode surface area cannot alone explain the increase in capacitance and energy density. We propose that the increase in electrical lines of force, due to edging effects in the fractal electrodes, also contribute to the higher capacitance. This study shows that electrode fractal design is a viable strategy for improving the performance of integrated μ-SCs that use thin-film electrodes at no extra processing or fabrication cost.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Hota MK, Jiang Q, Mashraei Y, Salama KN, Alshareef HN (2017) Fractal Electrochemical Microsupercapacitors. Advanced Electronic Materials 3: 1700185. Available: http://dx.doi.org/10.1002/aelm.201700185.
Publisher:
Wiley-Blackwell
Journal:
Advanced Electronic Materials
Issue Date:
17-Aug-2017
DOI:
10.1002/aelm.201700185
Type:
Article
ISSN:
2199-160X
Sponsors:
Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors thank the nanofabrication laboratory staff and the imaging and characterization laboratory staff at KAUST, especially Elhadj M. Diallo for their excellent support.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/aelm.201700185/full
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHota, Mrinal Kantien
dc.contributor.authorJiang, Qiuen
dc.contributor.authorMashraei, Yousofen
dc.contributor.authorSalama, Khaled N.en
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2017-10-30T08:39:49Z-
dc.date.available2017-10-30T08:39:49Z-
dc.date.issued2017-08-17en
dc.identifier.citationHota MK, Jiang Q, Mashraei Y, Salama KN, Alshareef HN (2017) Fractal Electrochemical Microsupercapacitors. Advanced Electronic Materials 3: 1700185. Available: http://dx.doi.org/10.1002/aelm.201700185.en
dc.identifier.issn2199-160Xen
dc.identifier.doi10.1002/aelm.201700185en
dc.identifier.urihttp://hdl.handle.net/10754/625995-
dc.description.abstractThe first successful fabrication of microsupercapacitors (μ-SCs) using fractal electrode designs is reported. Using sputtered anhydrous RuO thin-film electrodes as prototypes, μ-SCs are fabricated using Hilbert, Peano, and Moore fractal designs, and their performance is compared to conventional interdigital electrode structures. Microsupercapacitor performance, including energy density, areal and volumetric capacitances, changes with fractal electrode geometry. Specifically, the μ-SCs based on the Moore design show a 32% enhancement in energy density compared to conventional interdigital structures, when compared at the same power density and using the same thin-film RuO electrodes. The energy density of the Moore design is 23.2 mWh cm at a volumetric power density of 769 mW cm. In contrast, the interdigital design shows an energy density of only 17.5 mWh cm at the same power density. We show that active electrode surface area cannot alone explain the increase in capacitance and energy density. We propose that the increase in electrical lines of force, due to edging effects in the fractal electrodes, also contribute to the higher capacitance. This study shows that electrode fractal design is a viable strategy for improving the performance of integrated μ-SCs that use thin-film electrodes at no extra processing or fabrication cost.en
dc.description.sponsorshipResearch reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors thank the nanofabrication laboratory staff and the imaging and characterization laboratory staff at KAUST, especially Elhadj M. Diallo for their excellent support.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/aelm.201700185/fullen
dc.subjectfractal electrode designen
dc.subjectmicrosupercapacitorsen
dc.subjectRuO2en
dc.titleFractal Electrochemical Microsupercapacitorsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalAdvanced Electronic Materialsen
kaust.authorHota, Mrinal Kantien
kaust.authorJiang, Qiuen
kaust.authorMashraei, Yousofen
kaust.authorSalama, Khaled N.en
kaust.authorAlshareef, Husam N.en
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