Macroporous nitrogen-containing carbon for electrochemical capacitors

0556692 - ÚMCH 2023 RIV GB eng J - Článek v odborném periodiku
Milakin, Konstantin A. - Gupta, Sonal - Pop-Georgievski, Ognen - Morávková, Zuzana - Acharya, Udit - Taboubi, Oumayma - Breitenbach, S. - Gavrilov, N. - Unterweger, C. - Bober, Patrycja
Macroporous nitrogen-containing carbon for electrochemical capacitors.
Electrochimica acta. Roč. 418, 20 June (2022), č. článku 140370. ISSN 0013-4686. E-ISSN 1873-3859
Grant CEP: GA ČR(CZ) GA21-01401S; GA ČR(CZ) GA20-08679S
Institucionální podpora: RVO:61389013
Klíčová slova: nitrogen-containing carbon * polypyrrole * cryopolymerization
Obor OECD: Polymer science
Impakt faktor: 6.6, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0013468622005321?via%3Dihub

Polypyrrole-gelatin aerogels were synthesized by a one-step cryopolymerization approach and carbonized at various temperatures (100–700 °C). The mechanical integrity and macroporous morphology (pore size 4–16 µm) of materials carbonized at all studied temperatures were preserved after carbonization. Raman and X-ray photoelectron spectroscopies confirmed the aerogel conversion to carbon with gradually enhanced structural order at higher temperatures (300–600 °C). Change of the material conductivity with carbonization temperature follows the evolution of its molecular structure, reaching 2 × 10–5 S cm–1 for a fully carbonized aerogel (700 °C). Specific surface area and total pore volume values for the carbonized material were ⁓one order of magnitude higher (441.7 m2 g–1 and 0.21 cm3 g–1 at 600 °C, respectively) compared to the ones of the precursor. Cyclic voltammetry measurements showed that gravimetric capacitance of the products increased at higher carbonization temperatures up to 209 F g–1 (700 °C) and was stable for at least 1000 cycles. Galvanostatic charge-discharge method showed the highest capacitance 273 F g–1 (1 M HCl). The prepared nitrogen-containing carbon materials can be potentially used for supercapacitor applications.
Trvalý link: http://hdl.handle.net/11104/0331108