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Matching Diethyl Terephthalate with n-Doped Conducting Polymers
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - BMC.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - BMC.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.ORCID-id: 0000-0002-5496-9664
Vise andre og tillknytning
2015 (engelsk)Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 119, nr 33, s. 18956-18963Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The combination of small, high charge capacity molecules as pendant groups with a conducting polymer backbone having good electronic conductivity upon doping, gives the possibility to design a high capacity conducting redox polymer material for electric energy storage applications. The desired synergetic effect of the two components requires energy matching as well as chemical compatibility of the pendant group and the polymer backbone. Here we investigate the matching of diethyl terephthalate (DeT) with the thiophene-based conducting polymers polythiophene (PT), poly(3,4-ethylenedioxythiophene) (PEDOT), and polyphenylthiophene. We show that a stable and well-defined electrochemical response of DeT is achieved, together with all conducting polymers except for PT in tetrabutylammonium hexafluorophosphate electrolyte, indicating good energy match as well as chemical compatibility between DeT and polymers. By varying the size of ammonium cations in the electrolytes, we further show how this size affects the conductivity and the cycling stability of the polymers and also that the n-doping performance of all conducting polymers can be improved by the use of smaller alkyl ammonium cations. On the basis of these results, we suggest that PEDOT and PT are suitable candidates for a polymer backbone in conducting redox polymers with DeT pendant groups.

sted, utgiver, år, opplag, sider
2015. Vol. 119, nr 33, s. 18956-18963
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-262423DOI: 10.1021/acs.jpcc.5b05067ISI: 000360026200015OAI: oai:DiVA.org:uu-262423DiVA, id: diva2:854700
Forskningsfinansiär
Swedish Foundation for Strategic Research Swedish Research CouncilCarl Tryggers foundation Swedish Energy AgencyTilgjengelig fra: 2015-09-17 Laget: 2015-09-15 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Inngår i avhandling
1. Terephthalate-Functionalized Conducting Redox Polymers for Energy Storage Applications
Åpne denne publikasjonen i ny fane eller vindu >>Terephthalate-Functionalized Conducting Redox Polymers for Energy Storage Applications
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Organic electrode materials, as sustainable and environmental benign alternatives to inorganic electrode materials, show great promise for achieving cheap, light, versatile and disposable devices for electrical energy storage applications. Conducting redox polymers (CRPs) are a new class of organic electrode materials where the charge storage capacity is provided by the redox chemistry of functional pendent groups and electronic conductivity is provided by the doped conducting polymer backbone, enabling the production of energy storage devices with high charge storage capacity and high power capability. This pendant-conducting polymer backbone combination can solve two of the main problems associated with organic molecule-based electrode materials, i.e. the dissolution of the active material and the sluggish charge transport within the material. In this thesis, diethyl terephthalate and polythiophenes were utilized as the pendant and the backbone, respectively. The choice of pendant-conducting polymer backbone combination was based on potential match between the two moieties, i.e. the redox reaction of terephthalate pendent groups and the n-doping of polythiophene backbone occur in the same potential region. The resulting CRPs exhibited fast charge transport within the polymer films and low activation energies involved charge propagation through these materials. In the design of these CRPs an unconjugated link between the pendant and the backbone was found to be advantageous in terms of the polymerizability of the monomers and for the preservation of individual redox activity of the pendants and the polymer chain in CRPs. The functionalized materials were specifically designed as anode materials for energy storage applications and, although insufficient cycling stability was observed, the work presented in this thesis demonstrates that the combination of redox active functional groups with conducting polymers, forming CRPs, shows promise for the development of organic matter-based electrical energy storage materials.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2016. s. 60
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1437
Emneord
conducting polymers, terephthalate, polythiophene, PEDOT, conductance
HSV kategori
Identifikatorer
urn:nbn:se:uu:diva-304628 (URN)978-91-554-9715-6 (ISBN)
Disputas
2016-11-24, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 09:30 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2016-11-08 Laget: 2016-10-06 Sist oppdatert: 2016-11-16
2. Conducting Redox Polymers for Electrode Materials: Synthetic Strategies and Electrochemical Properties
Åpne denne publikasjonen i ny fane eller vindu >>Conducting Redox Polymers for Electrode Materials: Synthetic Strategies and Electrochemical Properties
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Organic electrode materials represent an intriguing alternative to their inorganic counterparts due to their sustainable and environmental-friendly properties. Their plastic character allows for the realization of light-weight, versatile and disposable devices for energy storage. Conducting redox polymers (CRPs) are one type of the organic electrode materials involved, which consist of a π-conjugated polymer backbone and covalently attached redox units, the so-called pendant. The polymer backbone can provide conductivity while it is oxidized or reduced (i. e., p- or n-doped) and the concurrent redox chemistry of the pendant provides charge capacity. The combination of these two components enables CRPs to provide both high charge capacity and high power capability. This dyad polymeric framework provides a solution to the two main problems associated with organic electrode materials based on small molecules: the dissolution of the active material in the electrolyte, and the sluggish charge transport within the material. This thesis introduces a general synthetic strategy to obtain the monomeric CRPs building blocks, followed by electrochemical polymerization to afford the active CRPs material. The choice of pendant and of polymer backbone depends on the potential match between these two components, i.e. the redox reaction of the pendant and the doping of backbone occurring within the same potential region. In the thesis, terephthalate and polythiophene were selected as the pendant and polymer backbone respectively, to get access to low potential CRPs. It was found that the presence of a non-conjugated linker between polymer backbone and pendant is essential for the polymerizability of the monomers as well as for the preservation of individual redox activities. The resulting CRPs exhibited fast charge transport within the polymer film and low activation barriers for charge propagation. These low potential CRPs were designed as the anode materials for energy storage applications. The combination of redox active pendant as charge carrier and a conductive polymer backbone reveals new insights into the requirements of organic matter based electrical energy storage materials.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2017. s. 83
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1604
Emneord
Organic electrode material, Energy storage, Conducting redox polymer, Polythiophene, Terephthalate, PEDOT
HSV kategori
Forskningsprogram
Kemi med inriktning mot organisk kemi
Identifikatorer
urn:nbn:se:uu:diva-334562 (URN)978-91-513-0168-6 (ISBN)
Disputas
2018-01-19, B41, BMC, Husargatan, Uppsala, 09:15 (engelsk)
Opponent
Veileder
Forskningsfinansiär
SweGRIDS - Swedish Centre for Smart Grids and Energy StorageSwedish Research CouncilSwedish Foundation for Strategic Research
Tilgjengelig fra: 2017-12-21 Laget: 2017-11-23 Sist oppdatert: 2018-03-08

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