N-doped porous carbon film electrodes for electrochemical capacitor, made by electrospray of sol precursors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F19%3AA2302HRM" target="_blank" >RIV/61988987:17310/19:A2302HRM - isvavai.cz</a>

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:000488203600005" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:000488203600005</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

N-doped porous carbon film electrodes for electrochemical capacitor, made by electrospray of sol precursors

Popis výsledku v původním jazyce

Heteroatom doping in carbon structure enhances surface wettability, electrical conductivity, and electron-donor/acceptor properties that in turn, improves the electrochemical performance of carbon electrodes. In this article, in situ grown carbon film electrodes are obtained through electrospray of polymeric sol on carbon paper, followed by curing, and carbonization. The nitrogen functionality in these binder-free carbon film electrodes is successfully incorporated from melamine addition in resorcinolformaldehyde sol. The film electrode shows a capacitance of 223 mF cm(-2) (446 Fg(-1)), and volumetric energy density of 15.2 mWh cm(-3) at 1 mA cm(-2) in a symmetric cell with 2 M KOH as electrolyte. Furthermore, these electrodes exhibit excellent cyclic stability even after 5000 charge-discharge cycles with almost complete capacitance retention at 5 mA cm(-2). The outstanding electrochemical performance of carbon film electrodes are due to the combined effect of following steps: (i) incorporation of nitrogen and oxygen in right amount, (ii) retention of the desired pore size distribution, and fraction of micropores through systematic balancing of resorcinol to melamine ratio in precursor sol, (iii) disintegration of sol by electrospray prior to deposition on carbon paper, that in turn produces a porous three-dimensional interconnected network of nanoparticulate film, and (iv) lyophilization of wet gel layer that retains the pore spaces during solvent removal. (C) 2019 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

N-doped porous carbon film electrodes for electrochemical capacitor, made by electrospray of sol precursors

Popis výsledku anglicky

Heteroatom doping in carbon structure enhances surface wettability, electrical conductivity, and electron-donor/acceptor properties that in turn, improves the electrochemical performance of carbon electrodes. In this article, in situ grown carbon film electrodes are obtained through electrospray of polymeric sol on carbon paper, followed by curing, and carbonization. The nitrogen functionality in these binder-free carbon film electrodes is successfully incorporated from melamine addition in resorcinolformaldehyde sol. The film electrode shows a capacitance of 223 mF cm(-2) (446 Fg(-1)), and volumetric energy density of 15.2 mWh cm(-3) at 1 mA cm(-2) in a symmetric cell with 2 M KOH as electrolyte. Furthermore, these electrodes exhibit excellent cyclic stability even after 5000 charge-discharge cycles with almost complete capacitance retention at 5 mA cm(-2). The outstanding electrochemical performance of carbon film electrodes are due to the combined effect of following steps: (i) incorporation of nitrogen and oxygen in right amount, (ii) retention of the desired pore size distribution, and fraction of micropores through systematic balancing of resorcinol to melamine ratio in precursor sol, (iii) disintegration of sol by electrospray prior to deposition on carbon paper, that in turn produces a porous three-dimensional interconnected network of nanoparticulate film, and (iv) lyophilization of wet gel layer that retains the pore spaces during solvent removal. (C) 2019 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

CARBON

ISSN

0008-6223

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

17.10.2019

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

33-41

Kód UT WoS článku

000488203600005

EID výsledku v databázi Scopus

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