Anthraquinone modification of microporous ...
Document type :
Article dans une revue scientifique
Title :
Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications
Author(s) :
Brousse, K. [Auteur]
Centre interuniversitaire de recherche et d'ingenierie des matériaux [CIRIMAT]
Martin, C. [Auteur]
Brisse, A.L. [Auteur]
Institut des Matériaux Jean Rouxel [IMN]
Lethien, C. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Simon, P. [Auteur]
Taberna, P.L. [Auteur]
Centre interuniversitaire de recherche et d'ingenierie des matériaux [CIRIMAT]
Brousse, T. [Auteur]
Institut des Matériaux Jean Rouxel [IMN]
Centre interuniversitaire de recherche et d'ingenierie des matériaux [CIRIMAT]
Martin, C. [Auteur]
Brisse, A.L. [Auteur]
Institut des Matériaux Jean Rouxel [IMN]
Lethien, C. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Simon, P. [Auteur]
Taberna, P.L. [Auteur]
Centre interuniversitaire de recherche et d'ingenierie des matériaux [CIRIMAT]
Brousse, T. [Auteur]
Institut des Matériaux Jean Rouxel [IMN]
Journal title :
Electrochimica Acta
Pages :
391 - 398
Publisher :
Elsevier
Publication date :
2017-08
ISSN :
0013-4686
English keyword(s) :
Micro-supercapacitors
Carbide-derived carbon
Anthraquinone- Electrochemical grafting
Diazonium chemistry
Carbide-derived carbon
Anthraquinone- Electrochemical grafting
Diazonium chemistry
HAL domain(s) :
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
English abstract : [en]
The modification of carbide derived carbon (CDC) thin film electrodes with anthraquinone (AQ) molecules was demonstrated by using pulsed chronoamperometry, in 0.1 M NEt4BF4/ACN solution of AQ diazonium derivative. The ...
Show more >The modification of carbide derived carbon (CDC) thin film electrodes with anthraquinone (AQ) molecules was demonstrated by using pulsed chronoamperometry, in 0.1 M NEt4BF4/ACN solution of AQ diazonium derivative. The functionalization of CDC electrodes was only possible when a critical pore size is reached: only 2 nm pore diameter CDC can be grafted with AQ moieties, smaller pore size leading to a poorly functionalized electrode. High AQ surface coverage of 0.88 × 10−10 mol.cm−2 was determined using 2 nm pore size CDC. Despite a decrease in double layer capacitance value of about 10%, the total capacitance of the AQ-modified on-chip CDC electrodes was twice larger than that of pristine CDC film, leading to high total capacitance value of 44 mF.cm−2 (338 F.cm−3). The cyclability of the AQ-modified on-chip CDC electrode was also investigated. The faradic contribution of AQ grafted molecules progressively decreased during cycling and only 39% of the normalized capacity remained after 500 cycles; this decrease has been assigned to electrostatic repulsion of dianionic AQ confined in narrow micropores in the alkaline media.Show less >
Show more >The modification of carbide derived carbon (CDC) thin film electrodes with anthraquinone (AQ) molecules was demonstrated by using pulsed chronoamperometry, in 0.1 M NEt4BF4/ACN solution of AQ diazonium derivative. The functionalization of CDC electrodes was only possible when a critical pore size is reached: only 2 nm pore diameter CDC can be grafted with AQ moieties, smaller pore size leading to a poorly functionalized electrode. High AQ surface coverage of 0.88 × 10−10 mol.cm−2 was determined using 2 nm pore size CDC. Despite a decrease in double layer capacitance value of about 10%, the total capacitance of the AQ-modified on-chip CDC electrodes was twice larger than that of pristine CDC film, leading to high total capacitance value of 44 mF.cm−2 (338 F.cm−3). The cyclability of the AQ-modified on-chip CDC electrode was also investigated. The faradic contribution of AQ grafted molecules progressively decreased during cycling and only 39% of the normalized capacity remained after 500 cycles; this decrease has been assigned to electrostatic repulsion of dianionic AQ confined in narrow micropores in the alkaline media.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
ANR Project :
Source :
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