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Rebis, Tomasz
Publikasjoner (3 av 3) Visa alla publikasjoner
Wagner, M., Rebis, T. & Inganäs, O. (2016). Enhancing charge storage of conjugated polymer electrodes with phenolic acids. Journal of Power Sources, 302, 324-330
Åpne denne publikasjonen i ny fane eller vindu >>Enhancing charge storage of conjugated polymer electrodes with phenolic acids
2016 (engelsk)Inngår i: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 302, s. 324-330Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We here present studies of electrochemical doping of poly(1-aminoanthraquinone) (PAAQ) films with three structurally different phenolic acids. The examined phenolic acids (sinapic, ferulic and syringic acid) were selected due to their resemblance to redox active groups, which can be found in lignin. The outstanding electrochemical stability of PAAQ films synthesized for this work enabled extensive cycling of phenolic acid-doped PAAQ films. Potentiodynamic and charge discharge studies revealed that phenolic acid-doped PAAQ films exhibited enhanced capacitance in comparison to undoped PAAQ films, together with appearance of redox activity characteristics specific for each dopant. Electrochemical kinetic studies performed on microelectrodes affirmed the fast electron transfer for hydroquinone-to-quinone reactions with these phenolic compounds. These results imply the potential application of phenolic acids in cheap and degradable energy storage devices. (C) 2015 Elsevier B.V. All rights reserved.

sted, utgiver, år, opplag, sider
ELSEVIER SCIENCE BV, 2016
Emneord
Conjugated polymers; Phenolic acids; Quinones; Redox capacitor
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-124084 (URN)10.1016/j.jpowsour.2015.10.062 (DOI)000366068800042 ()
Merknad

Funding Agencies|Knut and Alice Wallenberg foundation through the project Power Papers; Wallenberg Scholar grant

Tilgjengelig fra: 2016-01-25 Laget: 2016-01-19 Sist oppdatert: 2017-11-30
Ajjan, F., Casado, N., Rebis, T., Elfwing, A., Solin, N., Mecerreyes, D. & Inganäs, O. (2016). High performance PEDOT/lignin biopolymer composites for electrochemical supercapacitors. Journal of Materials Chemistry A, 4(5), 1838-1847
Åpne denne publikasjonen i ny fane eller vindu >>High performance PEDOT/lignin biopolymer composites for electrochemical supercapacitors
Vise andre…
2016 (engelsk)Inngår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, nr 5, s. 1838-1847Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Developing sustainable organic electrode materials for energy storage applications is an urgent task. We present a promising candidate based on the use of lignin, the second most abundant biopolymer in nature. This polymer is combined with a conducting polymer, where lignin as a polyanion can behave both as a dopant and surfactant. The synthesis of PEDOT/Lig biocomposites by both oxidative chemical and electrochemical polymerization of EDOT in the presence of lignin sulfonate is presented. The characterization of PEDOT/Lig was performed by UV-Vis-NIR spectroscopy, FTIR infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, cyclic voltammetry and galvanostatic charge-discharge. PEDOT doped with lignin doubles the specific capacitance (170.4 F g(-1)) compared to reference PEDOT electrodes (80.4 F g(-1)). The enhanced energy storage performance is a consequence of the additional pseudocapacitance generated by the quinone moieties in lignin, which give rise to faradaic reactions. Furthermore PEDOT/Lig is a highly stable biocomposite, retaining about 83% of its electroactivity after 1000 charge/discharge cycles. These results illustrate that the redox doping strategy is a facile and straightforward approach to improve the electroactive performance of PEDOT.

sted, utgiver, år, opplag, sider
ROYAL SOC CHEMISTRY, 2016
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-125323 (URN)10.1039/c5ta10096h (DOI)000368839200035 ()
Merknad

Funding Agencies|Power Papers project from the Knut and Alice Wallenberg foundation; Wallenberg Scholar grant from the Knut and Alice Wallenberg foundation; Marie Curie network Renaissance (NA); European Research Council by Starting Grant Innovative Polymers for Energy Storage (iPes) [306250]; Basque Government

Tilgjengelig fra: 2016-02-23 Laget: 2016-02-19 Sist oppdatert: 2017-11-30
Rebis, T., Yang Nilsson, T. & Inganäs, O. (2016). Hybrid materials from organic electronic conductors and synthetic-lignin models for charge storage applications. Journal of Materials Chemistry A, 4(5), 1931-1940
Åpne denne publikasjonen i ny fane eller vindu >>Hybrid materials from organic electronic conductors and synthetic-lignin models for charge storage applications
2016 (engelsk)Inngår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, nr 5, s. 1931-1940Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Homopolymers and copolymers of the monolignols syringol (S) and guaiacol (G) were prepared as well-defined lignin model compounds. Polymerisation was performed by phenol-formaldehyde condensation, also including the monomer hydroquinone (HQ) to extend the range of redox processes in these synthetic lignins (SLig). The chemical structures of the SLig samples were characterized by C-13 and quantitative P-31 NMR, and the molecular weight was monitored by size exclusion chromatography (SEC). Subsequently, SLig were incorporated into two different electron-conducting matrix - single-wall carbon nanotubes (SWNT) and polypyrrole (PPy), respectively. As a result, the hybrid materials, with a controlled amount of SWNT or with an unknown amount of PPy, were assembled and compared. The charge storage properties in the investigated materials are attributed to contributions from both the double-layer capacitance of the conducting matrix, and the faradaic reactions provided by quinone groups immobilized in the electrodes. The results indicate a considerable improvement of charge capacity, with the synthetic lignins incorporated in the hybrid materials. With a PPy carrying S, G and HQ, better performance is obtained than has previously been obtained with lignin derivatives, showing a maximum capacity of 94 mA h g(-1). Moreover, a low amount of electronic conductor (20% wt of SWNT) is adequate to perform efficient electron communication between redox active quinones and the electrode surface, providing 72 mA h g(-1).

sted, utgiver, år, opplag, sider
ROYAL SOC CHEMISTRY, 2016
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-125324 (URN)10.1039/c5ta06821e (DOI)000368839200045 ()
Merknad

Funding Agencies|Knut and Alice Wallenberg Foundation through project Power Papers

Tilgjengelig fra: 2016-02-24 Laget: 2016-02-19 Sist oppdatert: 2017-11-30
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