Towards fractional-order capacitors with broad tunable constant phase angles: Multi-walled carbon nanotube-polymer composite as a case study

Handle URI:
http://hdl.handle.net/10754/626887
Title:
Towards fractional-order capacitors with broad tunable constant phase angles: Multi-walled carbon nanotube-polymer composite as a case study
Authors:
Agambayev, Agamyrat ( 0000-0002-5078-7417 ) ; Rajab, Karam Hani; Hassan, Ali H.; Farhat, Mohamed; Bagci, Hakan ( 0000-0003-3867-5786 ) ; Salama, Khaled N. ( 0000-0001-7742-1282 )
Abstract:
In this study, multi-walled carbon nanotube (MWCNT) filled Polyevinelidenefluoride-trifluoroethylene-chlorofluoroethylene (PVDF-TrFE-CFE) composites are used to realize fractional-order capacitors (FOCs). A solution-mixing and drop-casting approach is used to fabricate the composite. Due to the high aspect ratio of MWCNTs, percolation regime starts at a small weight percentage (wt%), 1.00 % .The distributed MWCNTs inside the polymer act as an electrical network of micro-capacitors and micro-resistors, which, in effect, behaves like a FOC. The resulting FOCs' constant phase angle (CPA) can be tuned from to by changing the wt% of the MWCNTs. This is the largest dynamic range reported so far at the frequency range from 150 kHz to 2 MHz for an FOC. Furthermore, the CPA and pseudo-capacitance are shown to be practically stable (with less than 1% variation) when the applied voltage is, changed between 500 µV and 5V. For a fixed value of CPA, the pseudo-capacitance can be tuned by changing the thickness of the composite, which can be done in a straightforward manner via the solution-mixing and drop-casting fabrication approach. Finally, it is shown that the frequency of a Hartley oscillator built using an FOC is almost 15 times higher than that of a Hartley oscillator built using a conventional capacitor.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; SABIC - Corporate Research and Innovation Center (CRI) at KAUST
Citation:
Agambayev A, Rajab KH, Hassan AH, Farhat M, Bagci H, et al. (2018) Towards fractional-order capacitors with broad tunable constant phase angles: multi-walled carbon nanotube-polymer composite as a case study. Journal of Physics D: Applied Physics 51: 065602. Available: http://dx.doi.org/10.1088/1361-6463/aaa4de.
Publisher:
IOP Publishing
Journal:
Journal of Physics D: Applied Physics
KAUST Grant Number:
RGC/3/2385-01
Issue Date:
3-Jan-2018
DOI:
10.1088/1361-6463/aaa4de
Type:
Article
ISSN:
0022-3727; 1361-6463
Sponsors:
The authors would like to thank the King Abdullah University of Science and Technology (KAUST) and Saudi Basic Industries Corporation (SABIC) for funding this work under Grant No. RGC/3/2385-01.
Additional Links:
http://iopscience.iop.org/article/10.1088/1361-6463/aaa4de
Appears in Collections:
Articles; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAgambayev, Agamyraten
dc.contributor.authorRajab, Karam Hanien
dc.contributor.authorHassan, Ali H.en
dc.contributor.authorFarhat, Mohameden
dc.contributor.authorBagci, Hakanen
dc.contributor.authorSalama, Khaled N.en
dc.date.accessioned2018-01-28T07:01:38Z-
dc.date.available2018-01-28T07:01:38Z-
dc.date.issued2018-01-03en
dc.identifier.citationAgambayev A, Rajab KH, Hassan AH, Farhat M, Bagci H, et al. (2018) Towards fractional-order capacitors with broad tunable constant phase angles: multi-walled carbon nanotube-polymer composite as a case study. Journal of Physics D: Applied Physics 51: 065602. Available: http://dx.doi.org/10.1088/1361-6463/aaa4de.en
dc.identifier.issn0022-3727en
dc.identifier.issn1361-6463en
dc.identifier.doi10.1088/1361-6463/aaa4deen
dc.identifier.urihttp://hdl.handle.net/10754/626887-
dc.description.abstractIn this study, multi-walled carbon nanotube (MWCNT) filled Polyevinelidenefluoride-trifluoroethylene-chlorofluoroethylene (PVDF-TrFE-CFE) composites are used to realize fractional-order capacitors (FOCs). A solution-mixing and drop-casting approach is used to fabricate the composite. Due to the high aspect ratio of MWCNTs, percolation regime starts at a small weight percentage (wt%), 1.00 % .The distributed MWCNTs inside the polymer act as an electrical network of micro-capacitors and micro-resistors, which, in effect, behaves like a FOC. The resulting FOCs' constant phase angle (CPA) can be tuned from to by changing the wt% of the MWCNTs. This is the largest dynamic range reported so far at the frequency range from 150 kHz to 2 MHz for an FOC. Furthermore, the CPA and pseudo-capacitance are shown to be practically stable (with less than 1% variation) when the applied voltage is, changed between 500 µV and 5V. For a fixed value of CPA, the pseudo-capacitance can be tuned by changing the thickness of the composite, which can be done in a straightforward manner via the solution-mixing and drop-casting fabrication approach. Finally, it is shown that the frequency of a Hartley oscillator built using an FOC is almost 15 times higher than that of a Hartley oscillator built using a conventional capacitor.en
dc.description.sponsorshipThe authors would like to thank the King Abdullah University of Science and Technology (KAUST) and Saudi Basic Industries Corporation (SABIC) for funding this work under Grant No. RGC/3/2385-01.en
dc.publisherIOP Publishingen
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/1361-6463/aaa4deen
dc.rightsThis is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/1361-6463/aaa4deen
dc.titleTowards fractional-order capacitors with broad tunable constant phase angles: Multi-walled carbon nanotube-polymer composite as a case studyen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUSTen
dc.identifier.journalJournal of Physics D: Applied Physicsen
dc.eprint.versionPost-printen
kaust.authorAgambayev, Agamyraten
kaust.authorRajab, Karam Hanien
kaust.authorHassan, Ali H.en
kaust.authorFarhat, Mohameden
kaust.authorBagci, Hakanen
kaust.authorSalama, Khaled N.en
kaust.grant.numberRGC/3/2385-01en
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