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Battery type hybrid supercapacitor based on conducting polymers

Hibridni superkondenzatori akumulatorskog tipa na bazi provodnih polimera

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2018
Disertacija.pdf (5.685Mb)
IzvestajKomisije17387.pdf (290.6Kb)
Author
Alguail, Alsadek Ali
Mentor
Grgur, Branimir
Committee members
Gvozdenović, Milica
Jugović, Branimir
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Abstract
The electrochemically synthesized polypyrrole and lead-lead sulfate are examined as a potential electrodes for battery-type hybrid supercapacitors in acidic solution. Discharge in the specific current range of ∼0.6–2.27 A g−1 based on the active masses, can deliver capacity of 90–72 Ah kg−1, energy of 58–40 Wh kg−1 and power of 40–1350 W kg−1, with the specific capacitance of the cell in the range of 300–250 F g−1. The device exhibits battery-type behavior at low discharge rate, e.g. <0.5 A g−1, and supercapacitors-type behavior at a higher discharge rate. It is estimated that cell will lose 20% of initial capacitance after ∼500-600 cycles. The electrochemically synthesized polyaniline and lead sulfate are investigated as a possible active material of the aqueous based hybrid asymmetric supercapacitors. The electrochemical characteristics of polyaniline (doping-dedoping reactions), as well as electrical characteristics (specific capacitance, capacity, energy, and power) of the PbSO4|PA...NI cell, are determined. The cell capacitance, ranging from 216 F g−1 to 230 F g−1 is determined. In the specific current range of 0.3–1.5 A g−1 based on the active masses, the specific energy decrease from 30 to 20 Wh kg−1, while specific power increased from 200 to ∼800 W kg−1. The specific capacity of the cell, slightly decreased from 47 Ah g−1 to 40 Ah g−1 by increasing the specific current. It is estimated that cell will lose 20% of initial capacitance after ∼550 cycles. Based on the estimated specific energy and power, it is suggested that investigated cells could be classified as hydride asymmetric battery type supercapacitors оr “supercapattery” type of electrochemical power sources.

Elektrohemijski sintetizovani polipirol i olovo-olovo sulfat ispitani su kao potencijalne elektrode za hibridne superkondenzatore akumulatora tipa u kiselom rastvoru. Pražnjenjem u strujnom opsegu od ~0,6-2,27 A g-1 na bazi aktivnih masa, određene su vrednosti specifični kapaciteti od 90-72 Ah kg-1, energija od 58-40 Wh kg-1 i snaga od 40-1350 W kg-1, sa specifičnom kapacitivnošću ćelije u opsegu od 300-250 F g-1. Sistem pokazuje ponašanje tipa akumulatora pri malim strujama pražnjenja, npr. <0,5 A g-1 i superkondenzatorsko ponašanje pri većom strujama pražnjenja. Procenjeno je da će ćelija izgubiti 20% početnog kapaciteta posle ~ 500-600 ciklusa punjenja i pražnjenja. Elektrohemijski sintetizovani polianilin i olovo sulfat ispitani su kao mogući aktivni materijal hibridnih asimetričnih superkondenzatora. Određene su elektrohemijske karakteristike polianilina (reakcije dopovanja i dedopovanja), kao i električne karakteristike (specifična kapacitivnost, kapacitet, energija i snaga) ćeli...je. Određuene su kapacitivnosti ćelije, u opsegu od 216 F g-1 do 230 F g-1. Pri strujama pražnjenja u opsegu od 0.3-1.5 A g-1 na osnovu aktivnih masa, specifična energija se smanjuje sa 30 na 20 Wh kg-1, dok se specifična snaga povećana sa 200 na ~ 800 W kg-1. Specifični kapacitet ćelije, malo je smanjen sa 47 Ah g-1 na 40 Ah g-1. Procenjeno je da će ćelija izgubiti 20% početne kapacitivnosti nakon ~550 ciklusa. Na osnovu procenjenih vrednosti specifične energije i snage, predloženo je da ispitane ćelije mogu biti klasifikovane kao asimetrični hibridni superkondenzatori akumulatorskog tipa ili a "superkapabaterijska" vrsta elektrohemijskih izvora energije.

Faculty:
University of Belgrade, Faculty of Technology and Metallurgy
Date:
20-03-2018
Keywords:
polianilin / Polyaniline / Polypyrrole / Supercapattery / Specific energy / Specific power / polipirol / superkapabaterija / specifična energija / specifična snaga
[ Google Scholar ]
URI
http://nardus.mpn.gov.rs/handle/123456789/9624
http://eteze.bg.ac.rs/application/showtheses?thesesId=5896
https://fedorabg.bg.ac.rs/fedora/get/o:17892/bdef:Content/download
http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=50182159

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