Macroporous nitrogen-containing carbon for electrochemical capacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00556692" target="_blank" >RIV/61389013:_____/22:00556692 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468622005321?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468622005321?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2022.140370" target="_blank" >10.1016/j.electacta.2022.140370</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Macroporous nitrogen-containing carbon for electrochemical capacitors

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Macroporous nitrogen-containing carbon for electrochemical capacitors

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

418

Číslo periodika v rámci svazku

20 June

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

140370

Kód UT WoS článku

000807762100003

EID výsledku v databázi Scopus

2-s2.0-85128482422