Monolithic metal-based/porous carbon nanocomposites made from dissolved cellulose for use in electrochemical capacitor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F24%3AA250385Y" target="_blank" >RIV/61988987:17310/24:A250385Y - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2950155524000016" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2950155524000016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.greenca.2024.01.001" target="_blank" >10.1016/j.greenca.2024.01.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Monolithic metal-based/porous carbon nanocomposites made from dissolved cellulose for use in electrochemical capacitor

Popis výsledku v původním jazyce

Porous metal-based carbon nanocomposites, with a monolithic shape, were prepared by a one-pot synthesis fromdissolved cellulose and metallic salts using a simple, cheap, and environmentally friendly route. Their potentialperformances as electrochemical capacitors were tested with three metal precursors (M = Cu, Mn, and Fe) withtwo loadings and in an asymmetric cell for the Fe-based carbon material. Interestingly, here soluble metalprecursors were not deposited on a hard cellulose template but mixed in a precooled concentrated NaOH solution where cellulose was previously dissolved, allowing for a good dispersion of the metallic species. After afreezing step where concomitant cellulose regeneration and pore ice-templating phenomena took place, followedby a carbonization step, the mixture led to a porous carbon monolith embedding well-dispersed metal-basednanoparticles having a diameter below 20 nm and present as metallic, oxide, or carbide phase(s) according to theelement M. These materials were characterized by different physicochemical techniques and electrochemicaltests. Their performances as supercapacitors are discussed in light of the specific behaviour of the metal-basedphase and its influence on the carbon matrix properties such as mesopore formation and carbon graphitization.An asymmetric energy storage cell assembled with a Fe-based carbon electrode against a carbon xerogel electrode derived from a phenolic resin shows specific energy and power of 18.3 Wh kg−1 at 5 mA cm−2 and1.6 kW kg−1 at 25 mA cm−2, respectively

Název v anglickém jazyce

Monolithic metal-based/porous carbon nanocomposites made from dissolved cellulose for use in electrochemical capacitor

Popis výsledku anglicky

Porous metal-based carbon nanocomposites, with a monolithic shape, were prepared by a one-pot synthesis fromdissolved cellulose and metallic salts using a simple, cheap, and environmentally friendly route. Their potentialperformances as electrochemical capacitors were tested with three metal precursors (M = Cu, Mn, and Fe) withtwo loadings and in an asymmetric cell for the Fe-based carbon material. Interestingly, here soluble metalprecursors were not deposited on a hard cellulose template but mixed in a precooled concentrated NaOH solution where cellulose was previously dissolved, allowing for a good dispersion of the metallic species. After afreezing step where concomitant cellulose regeneration and pore ice-templating phenomena took place, followedby a carbonization step, the mixture led to a porous carbon monolith embedding well-dispersed metal-basednanoparticles having a diameter below 20 nm and present as metallic, oxide, or carbide phase(s) according to theelement M. These materials were characterized by different physicochemical techniques and electrochemicaltests. Their performances as supercapacitors are discussed in light of the specific behaviour of the metal-basedphase and its influence on the carbon matrix properties such as mesopore formation and carbon graphitization.An asymmetric energy storage cell assembled with a Fe-based carbon electrode against a carbon xerogel electrode derived from a phenolic resin shows specific energy and power of 18.3 Wh kg−1 at 5 mA cm−2 and1.6 kW kg−1 at 25 mA cm−2, respectively

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Green Carbon

ISSN

2950-1555

e-ISSN

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Svazek periodika

—

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

9

Strana od-do

109-117

Kód UT WoS článku

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EID výsledku v databázi Scopus

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