Causes of supercapacitors ageing in organic electrolyte

Azaïs, Philippe; Duclaux, Laurent; Florian, Pierre; Massiot, Dominique; Lillo-Ródenas, M.A.; Linares-Solano, Á.; Pérès, Jean-Paul; Jehoulet, C.; Béguin, François

doi:10.1016/j.jpowsour.2007.07.001

Cited by 370 publications

(231 citation statements)

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“…NMR is also nucleus-selective and can probe molecular motion in a range of dynamic regimes. Indeed, the interaction of molecules with porous carbon materials has been studied using NMR, both in working EDLC devices [13][14][15][16][17][18] and otherwise [19][20][21][22][23][24][25][26] , with nuclei close to the carbon surface being readily distinguished by their shift to lower frequencies (a shift to more negative p.p.m.). This characteristic shift of nuclear spins in strongly adsorbed (SA) or confined molecules/ions is a consequence of the shielding from the ring currents at the surface of the graphene-like sheets of carbon atoms, something that is well known in organic systems [27][28][29][30] , carbon nanotubes 31 and fullerenes 32 .…”

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confidence: 99%

Multinuclear in situ magnetic resonance imaging of electrochemical double-layer capacitors

et al. 2014

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The last decade has seen an intensified interest in the development and use of electrochemical double-layer capacitors, fuelled by the availability of new electrode materials. The use of nanoporous carbons, in particular, with extremely high surface areas for ion adsorption has enabled the development of working devices with significantly increased capacitances that have become viable alternatives to lithium-ion batteries in certain applications. An understanding of the charge storage mechanism and the ion dynamics inside the nanopores is only just emerging, with the most compelling evidence coming from simulation. Here we present the first in situ magnetic resonance imaging experiments of electrochemical double-layer capacitors. These experiments overcome the limitations of other techniques and give spatially resolved chemical information about the electrolyte ions in real time for a working capacitor of standard geometry. The results provide insight into the predominant capacitive processes occurring at different states of charge and discharge.

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confidence: 99%

Multinuclear in situ magnetic resonance imaging of electrochemical double-layer capacitors

et al. 2014

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“…In the former case with carbon-based electrodes, low fading of about 2 % after 1000 cycles was found [79]; in the latter case, solvent decomposition with film formation on the electrodes was found [80].…”

Section: The Ionically Conducting Phase In Betweenmentioning

confidence: 90%

Supercapacitors: from the Leyden jar to electric busses

Dubal

Holze

2016

ChemTexts

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Supercapacitors are introduced and reviewed as devices with very high electric power capability suggested to support and supplement other devices for electrochemical energy storage and conversion with higher energy content but lower power. They are currently of significant importance on the device and local (end-user) level already providing resources to meet power surge demands. In larger mobile systems (vehicles) they help meeting this demand and also offer high power storage capabilities when braking. On an even higher level, they can provide support for maintaining power quality and help in peak shaving. A brief historic background and general information is followed by an overview of materials and their combination into already marketed devices and in possible systems under development.

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“…oxygen and the electrolyte [19]. Organic electrolytes are of interest due to their higher voltage window, which can lead to higher energy density.…”

Section: Science China Materialsmentioning

confidence: 99%

Comparison of surface and bulk nitrogen modification in highly porous carbon for enhanced supercapacitors

Uchaker

2015

Sci. China Mater.

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Causes of supercapacitors ageing in organic electrolyte

Cited by 370 publications

References 23 publications

Multinuclear in situ magnetic resonance imaging of electrochemical double-layer capacitors

Multinuclear in situ magnetic resonance imaging of electrochemical double-layer capacitors

Supercapacitors: from the Leyden jar to electric busses

Comparison of surface and bulk nitrogen modification in highly porous carbon for enhanced supercapacitors

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