Advances on the use of diazonium chemistry for functionalization of materials used in energy storage systems

Assresahegn, Birhanu Desalegn; Brousse, Thierry; Bélanger, Daniel

doi:10.1016/j.carbon.2015.05.030

Cited by 137 publications

(75 citation statements)

References 135 publications

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“…The total charge Q tot passed in the electrode is the sum of a double layer contribution Q EDLC and the faradic contribution due to the AQ redox process Q AQ (C). Q AQ was determined from CV curves with EC-Lab software by calculating the charge corresponding to the oxidation wave of the AQ grafted sample [11,38]. The AQ capacity Q AQ was normalized to the CDC film footprint area, as gravimetric capacity and capacitance are meaningless for microsupercapacitors electrodes [52].…”

Section: Electrochemical Characterizations Of the Modified Cdc Filmmentioning

confidence: 99%

“…An alternative to this strategy consists in modifying carbon materials with foreign heteroatoms [10] or electrochemically active molecules [11], where the grafted molecules offer faradic contribution originating from redox reactions in addition to the double layer capacitive current [12]. Therefore, many studies have focused on the functionalization of carbon with electroactive moieties.…”

Section: Introductionmentioning

confidence: 99%

“…While the surface concentration increased as the grafting potential becomes more cathodic, it was proposed that multilayers of aryl radical can be grown from diazonium reduction. Although the diazonium salts are not designed to polymerize, films significantly thicker than monolayers can be obtained due to radical species formed in the vicinity of the electrode that can react with the previously grafted molecules [11,15].…”

Section: Introductionmentioning

confidence: 99%

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Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Brousse

Martin²,

Brisse

et al. 2017

Electrochimica Acta

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. A B S T R A C TThe modification of carbide derived carbon (CDC) thin film electrodes with anthraquinone (AQ) molecules was demonstrated by using pulsed chronoamperometry, in 0.1 M NEt 4 BF 4 /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 Â 10 À10 mol.cm À2 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 À2 (338 F.cm À3). The cyclability of the AQ-modified onchip 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.

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Section: Electrochemical Characterizations Of the Modified Cdc Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Brousse

Martin²,

Brisse

et al. 2017

Electrochimica Acta

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“…Essential studies of lithium sulfate [43], redox flow [44] and vanadium redox [45] are being pushed at present, to mention but a few examples. System development can also contribute to spreading storage systems better.…”

Section: Latest Niche Storage Technologiesmentioning

confidence: 99%

Energy storage systems: power grid and energy market use cases

Komarnicki¹

2016

Archives of Electrical Engineering

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Current power grid and market development, characterized by large growth of distributed energy sources in recent years, especially in Europa, are according energy storage systems an increasingly larger field of implementation. Existing storage technologies, e.g. pumped-storage power plants, have to be upgraded and extended by new but not yet commercially viable technologies (e.g. batteries or adiabatic compressed air energy storage) that meet expected demands. Optimal sizing of storage systems and technically and economically optimal operating strategies are the major challenges to the integration of such systems in the future smart grid. This paper surveys firstly the literature on the latest niche applications. Then, potential new use case and operating scenarios for energy storage systems in smart grids, which have been field tested, are presented and discussed and subsequently assessed technically and economically.

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“…By far, the most popular strategy is the use of aryl diazonium salts (Chehimi, 2012;Assresahegn et al, 2015). These organic layers can be grafted on a substrate: (i) by electrochemical induction, (ii) photochemically under UV/visible light, (iii) with ultrasound assistance, (iv) by ball-milling, or (v) by using a reducing agent and spontaneously.…”

Section: Quinones and Quinone-functionalized Carbonsmentioning

confidence: 99%

Carbons, Ionic Liquids, and Quinones for Electrochemical Capacitors

Díaz-Delgado¹,

Doherty

2016

Front. Mater.

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Carbons are the main electrode materials used in electrochemical capacitors, which are electrochemical energy storage devices with high power densities and long cycling lifetimes. However, increasing their energy density will improve their potential for commercial implementation. In this regard, the use of high surface area carbons and high voltage electrolytes are well-known strategies to increase the attainable energy density, and lately ionic liquids (ILs) have been explored as promising alternatives to current stateof-the-art acetonitrile-based electrolytes. Also, in terms of safety and sustainability, ILs are attractive electrolyte materials for electrochemical capacitors. In addition, it has been shown that the matching of the carbon pore size with the electrolyte ion size further increases the attainable electric double layer (EDL) capacitance and energy density. The use of pseudocapacitive reactions can significantly increase the attainable energy density, and quinonic-based materials offer a potentially sustainable and cost-effective research avenue for both the electrode and the electrolyte. This perspective will provide an overview of the current state-of-the-art research on electrochemical capacitors based on combinations of carbons, ILs, and quinonic compounds, highlighting performances and challenges and discussing possible future research avenues. In this regard, current interest is mainly focused on strategies, which may ultimately lead to commercially competitive, sustainable high-performance electrochemical capacitors for different applications including those requiring mechanical flexibility and biocompatibility.

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Advances on the use of diazonium chemistry for functionalization of materials used in energy storage systems

Cited by 137 publications

References 135 publications

Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Anthraquinone modification of microporous carbide derived carbon films for on-chip micro-supercapacitors applications

Energy storage systems: power grid and energy market use cases

Carbons, Ionic Liquids, and Quinones for Electrochemical Capacitors

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