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Träfflista för sökning "WFRF:(Sjödin Maria) srt2:(2010-2014)"

Search: WFRF:(Sjödin Maria) > (2010-2014)

  • Result 1-10 of 48
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1.
  • Carlsson, Daniel O., et al. (author)
  • A Comparative Study of the Effects of Rinsing and Aging of Polypyrrole/Nanocellulose Composites on Their Electrochemical Properties
  • 2013
  • In: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 117:14, s. 3900-3910
  • Journal article (peer-reviewed)abstract
    • The effects of polymerization conditions, rinsing, and storage on composites composed of polypyrrole (PPy) and Cladophora nanocellulose in terms of purity, chemical composition, conductivity, and electroactivity were investigated using conductivity measurements, cyclic voltammetry, FTIR-ATR, XPS, and ICP-AES. A clear correlation between rinsing volume and PPy degradation was found using water- or NaCl-rinsing solutions as evidenced by conductivity and electroactivity losses. It was further found, through FTIR-ATR as well as XPS-measurements, that this degradation was caused by incorporation of hydroxyl groups in the PPy-layer. The extent of degradation correlated with a shift in the FTIR-ATR peak around 1300 cm(-1), showing that FTIR-ATR may be used as a quick diagnostic tool to evaluate the extent of degradation. By the use of acidic rinsing solution, this degradation effect was eliminated and resulted in superior samples in terms of both conductivity and electroactivity and also in a more efficient removal of reactants. Upon ambient storage, over a period of 200 days, a gradual decrease in conductivity was found for initially highly conductive samples. The electroactivity, on the other hand, was relatively unaffected by storage, showing that conductivity measurements alone are ineffective to determine the degree of polymer degradation if the water content is not controlled. Also, FTIR-ATR measurements indicated that the oxidation state did not change to any large extent upon storage and that only minor degradation of PPy occurred. The results presented herein thus offer valuable guidelines on how to develop simple and reliable postsynthesis treatments of conducting polymer paper composites with performance fulfilling requirements on stability, electroactivity, and purity in applications such as environmentally friendly energy storage devices and biomedical applications.
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  • Karlsson, Christoffer, 1986-, et al. (author)
  • Computational Electrochemistry Study of 16 Isoindole-4,7-diones as Candidates for Organic Cathode Materials
  • 2012
  • In: The Journal of Physical Chemistry C. - : American Chemical Society. - 1932-7447 .- 1932-7455. ; 116:5, s. 3793-3801
  • Journal article (peer-reviewed)abstract
    • Prediction of the redox behavior of electroactive molecules enables screening of a variety of compounds and can serve as a guideline in the search for organic molecules for use as cathode materials in, for example, Li ion batteries. In this study, we present a computational strategy, based on density functional theory, to calculate redox potentials and acid dissociation constants for a series of 16 isoindole-4,7-dione (IID) derivatives. The calculations take all possible electron and proton transfers into account, and the results were found to correlate very well with electrochemical and spectroscopic measurements. The possibility of polymerizing the IID derivatives was also assessed computationally, as polymerization serves as a straightforward route to immobilize the active material. Three of the considered IIDs (5,6-dicyano-2-methyl-isoindole-4,7-dione, 5,6-dihydroxy-2-methyl-isoindole-4,7-dione, and 2-methyl-5-(trifluoromethyl)-isoindole-4,7-dione) are predicted to be particularly interesting for making polymers for organic cathodes because these are calculated to have high redox potentials and high specific capacities and to be readily polymerizable. The presented strategy is general and can be applied in the prediction of the electrochemical behavior of quinones as well as other systems involving proton and electron transfers.
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  • Result 1-10 of 48
Type of publication
conference paper (31)
journal article (14)
reports (1)
doctoral thesis (1)
licentiate thesis (1)
Type of content
peer-reviewed (39)
other academic/artistic (8)
pop. science, debate, etc. (1)
Author/Editor
Sjödin, Martin (42)
Strömme, Maria (40)
Nyholm, Leif (21)
Olsson, Henrik (20)
Gogoll, Adolf (18)
Karlsson, Christoffe ... (14)
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Nyström, Gustav (10)
Huang, Hao (9)
Yang, Li (8)
Carlsson, Daniel O. (8)
Karlsson, Christoffe ... (8)
Mihranyan, Albert (6)
Huang, Xiao (5)
Strømme, Maria, 1970 ... (4)
Brandell, Daniel (3)
Sjödin, Martin, 1974 ... (3)
Mihali, Viorica Alin ... (3)
Huang, Hao, 1988- (3)
Jämstorp, Erik (3)
Yang, Li, 1987- (2)
Razaq, Aamir (2)
Tammela, Petter (2)
Belhaj, Mohammed (1)
Araujo, Carlos Moyse ... (1)
Ahuja, Rajeev (1)
Rydberg, Tomas (1)
Lindblad, Maria (1)
Panigrahi, Puspamitr ... (1)
Bolin, Lisa (1)
Ferraz, Natalia (1)
Sjödin, Åke (1)
Bobacka, Johan (1)
Maria, Strømme (1)
Sjödin, Peter, Docen ... (1)
Wang, Zhaoui (1)
Mihranyan, Albert, 1 ... (1)
Jämstorp-Berg, Erik (1)
Araujo, Carlos Moyse ... (1)
Ahuj, Rajeev (1)
Panigrahi, Pusmamitr ... (1)
Wolf, Christina (1)
Santurio, Mateo (1)
Olsson, Henrik, 1986 ... (1)
Söderman, Pehr, 1982 ... (1)
Hidell, Markus, Dokt ... (1)
Rönngren, Robert, Do ... (1)
Kihl, Maria, Doktor (1)
Wang, Zhao-hui (1)
Maria, Stromme (1)
Martin, Sjödin (1)
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University
Uppsala University (46)
Royal Institute of Technology (1)
IVL Swedish Environmental Research Institute (1)
Language
English (48)
Research subject (UKÄ/SCB)
Engineering and Technology (29)
Natural sciences (19)

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