prikaz prve stranice dokumenta Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors
Access restricted to students and staff of home institution
Scientific paper - Original scientific paper
Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors
Journal of Materials Chemistry A, 7 (2019), 4; 1785-1796. https://doi.org/10.1039/c8ta09574d
Bober, Patrycja; Pfleger, Jiří; Pašti, Igor A.; Gavrilov, Nemanja; Filippov, Sergey K.; Klepac, Damir; Trchová, Miroslava; Hlídková, Helena; Stejskal, Jaroslav

Institutional repository: Repository of the University of Rijeka, Faculty of Medicine

Cite this document

Bober, P., Pfleger, J., Pašti, I. A., Gavrilov, N., Filippov, S. K., Klepac, D. ... Stejskal, J. (2019). Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors. Journal of Materials Chemistry A, 7. (4), 1785-1796. doi: 10.1039/c8ta09574d

Bober, Patrycja, et al. "Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors." Journal of Materials Chemistry A, vol. 7, no. 4, 2019, pp. 1785-1796. https://doi.org/10.1039/c8ta09574d

Bober, Patrycja, Jiří Pfleger, Igor A. Pašti, Nemanja Gavrilov, Sergey K. Filippov, Damir Klepac, Miroslava Trchová, Helena Hlídková and Jaroslav Stejskal. "Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors." Journal of Materials Chemistry A 7, no. 4 (2019): 1785-1796. https://doi.org/10.1039/c8ta09574d

Bober, P., et al. (2019) 'Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors', Journal of Materials Chemistry A, 7(4), pp. 1785-1796. doi: 10.1039/c8ta09574d

Bober P, Pfleger J, Pašti IA, Gavrilov N, Filippov SK, Klepac D, and sur.. Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors. Journal of Materials Chemistry A [Internet]. 2019 [cited 2024 December 28];7(4):1785-1796. doi: 10.1039/c8ta09574d

P. Bober, et al., "Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors", Journal of Materials Chemistry A, vol. 7, no. 4, pp. 1785-1796, 2019. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:184:241368. [Accessed: 28 December 2024]

Metadata
Title (english)Carbogels: carbonized conducting polyaniline/poly(vinyl alcohol) aerogels derived from cryogels for electrochemical capacitors
AuthorPatrycja Bober
AuthorJiří Pfleger
AuthorIgor A. Pašti
AuthorNemanja Gavrilov
AuthorSergey K. Filippov
AuthorDamir Klepac
AuthorMiroslava Trchová
AuthorHelena Hlídková
AuthorJaroslav Stejskal
Author's institutionUniversity of Rijeka
Faculty of Medicine
(Department of Chemistry and Biochemistry)
Scientific / art field,
discipline and subdiscipline		BIOMEDICINE AND HEALTHCARE
Basic Medical Sciences
Medical Biochemistry
Abstract (english)
Polyaniline cryogels supported with poly(vinyl alcohol) represent soft conducting macroporous materials suitable for conversion to aerogels by freeze-drying and, subsequently, to nitrogen- containing carbogels by carbonization in an inert atmosphere at 500-600 degrees C. The process was followed by thermogravimetric analysis and Raman spectroscopy at the molecular level. The spectral features indicate a significant degree of structural disorder in the material due to the extensive nitrogen and oxygen incorporation into the carbon sp(2) network, which is important for the improvement of capacitive performance. The macroporous morphology is preserved after carbonization but the specific surface area increased from 12 to 680 m(2) g(-1) after exposure to 500 degrees C in an inert atmosphere. The original conductivity of the cryogel swollen with an acid solution, 0.07 S cm(-1), was reduced to 2 x 10(-4) S cm(-1) for the aerogel and again to 10(-9) S cm(-1) as the carbonization progressed. The impedance spectra display Maxwell-Wagner-Sillars relaxation typical of heterogeneous composite systems with the contribution of ionic conductivity. The decrease in conductivity is in agreement with the significant drop in the static dielectric constant observed by broad-band dielectric spectroscopy and decrease in the spin number determined by electron paramagnetic resonance spectroscopy. Switching in the capacitive response from that dominated by faradaic surface processes at lower treatment temperatures to that of double-layer charging at elevated temperatures is evidenced, while the correlation between surface spin density and specific capacitance is emphasized. The results can be used as guidance for the rational design of novel active materials for electrochemical capacitors.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleJournal of Materials Chemistry A
Numberingvol. 7, no. 4, pp. 1785-1796
p-ISSN2050-7488
DOIhttps://doi.org/10.1039/c8ta09574d
URN:NBNurn:nbn:hr:184:241368
Publication2019
Document URLhttp://bib.irb.hr/1048542
Type of resourceText
Access conditionsInstitutional access
Terms of useLicence In copyright icon
Created on2022-02-09 08:58:01