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dc.contributor.authorHota, Mrinal Kanti
dc.contributor.authorJiang, Qiu
dc.contributor.authorMashraei, Yousof
dc.contributor.authorSalama, Khaled N.
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2017-10-30T08:39:49Z
dc.date.available2017-10-30T08:39:49Z
dc.date.issued2017-08-17
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.
dc.identifier.issn2199-160X
dc.identifier.doi10.1002/aelm.201700185
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.
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.
dc.publisherWiley
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/aelm.201700185/full
dc.subjectfractal electrode design
dc.subjectmicrosupercapacitors
dc.subjectRuO2
dc.titleFractal Electrochemical Microsupercapacitors
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentFunctional Nanomaterials and Devices Research Group
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSensors Lab
dc.identifier.journalAdvanced Electronic Materials
kaust.personHota, Mrinal Kanti
kaust.personJiang, Qiu
kaust.personMashraei, Yousof
kaust.personSalama, Khaled N.
kaust.personAlshareef, Husam N.
dc.date.published-online2017-08-17
dc.date.published-print2017-10


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