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    Rights statement: This is the author’s version of a work that was accepted for publication in Solid State Nuclear Magnetic Resonance. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Nuclear Magnetic Resonance, 74-75, 2016 DOI: 10.1016/j.ssnmr.2016.03.003

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Solid-state NMR studies of supercapacitors

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Solid-state NMR studies of supercapacitors. / Griffin, John Matthew; Forse, Alexander C.; Grey, Clare P.

In: Solid State Nuclear Magnetic Resonance, Vol. 74-75, 04.2016, p. 16-35.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Griffin, JM, Forse, AC & Grey, CP 2016, 'Solid-state NMR studies of supercapacitors', Solid State Nuclear Magnetic Resonance, vol. 74-75, pp. 16-35. https://doi.org/10.1016/j.ssnmr.2016.03.003

APA

Griffin, J. M., Forse, A. C., & Grey, C. P. (2016). Solid-state NMR studies of supercapacitors. Solid State Nuclear Magnetic Resonance, 74-75, 16-35. https://doi.org/10.1016/j.ssnmr.2016.03.003

Vancouver

Griffin JM, Forse AC, Grey CP. Solid-state NMR studies of supercapacitors. Solid State Nuclear Magnetic Resonance. 2016 Apr;74-75:16-35. https://doi.org/10.1016/j.ssnmr.2016.03.003

Author

Griffin, John Matthew ; Forse, Alexander C. ; Grey, Clare P. / Solid-state NMR studies of supercapacitors. In: Solid State Nuclear Magnetic Resonance. 2016 ; Vol. 74-75. pp. 16-35.

Bibtex

@article{5851bd8fe4974ab99d0d406eb8b4774a,
title = "Solid-state NMR studies of supercapacitors",
abstract = "Electrochemical double-layer capacitors, or {\textquoteleft}supercapacitors{\textquoteright} are attracting increasing attention as high-power energy storage devices for a wide range of technological applications. These devices store charge through electrostatic interactions between liquid electrolyte ions and the surfaces of porous carbon electrodes. However, many aspects of the fundamental mechanism of supercapacitance are still not well understood, and there is a lack of experimental techniques which are capable of studying working devices. Recently, solid-state NMR has emerged as a powerful tool for studying the local environments and behaviour of electrolyte ions in supercapacitor electrodes. In this Trends article, we review these recent developments and applications. We first discuss the basic principles underlying the mechanism of supercapacitance, as well as the key NMR observables that are relevant to the study of supercapacitor electrodes. We then review some practical aspects of the study of working devices using ex situ and in situ methodologies and explain the key advances that these techniques have allowed on the study of supercapacitor charging mechanisms. NMR experiments have revealed that the pores of the carbon electrodes contain a significant number of electrolyte ions in the absence of any charging potential. This has important implications for the molecular mechanisms of supercapacitance, as charge can be stored by different ion adsorption/desorption processes. Crucially, we show how in situ NMR experiments can be used to quantitatively study and characterise the charging mechanism, with the experiments providing the most detailed picture of charge storage to date, offering the opportunity to design enhanced devices. Finally, an outlook for future directions for solid-state NMR in supercapacitor research is offered.",
keywords = "Energy storage, Supercapacitors, Solid-state NMR, Ring Currents, In situ NMR, Charging mechanisms, Microporous carbon, Ionic, Liquids",
author = "Griffin, {John Matthew} and Forse, {Alexander C.} and Grey, {Clare P.}",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Solid State Nuclear Magnetic Resonance. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Nuclear Magnetic Resonance, 74-75, 2016 DOI: 10.1016/j.ssnmr.2016.03.003",
year = "2016",
month = apr,
doi = "10.1016/j.ssnmr.2016.03.003",
language = "English",
volume = "74-75",
pages = "16--35",
journal = "Solid State Nuclear Magnetic Resonance",
issn = "0926-2040",
publisher = "ACADEMIC PRESS INC ELSEVIER SCIENCE",

}

RIS

TY - JOUR

T1 - Solid-state NMR studies of supercapacitors

AU - Griffin, John Matthew

AU - Forse, Alexander C.

AU - Grey, Clare P.

N1 - This is the author’s version of a work that was accepted for publication in Solid State Nuclear Magnetic Resonance. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Nuclear Magnetic Resonance, 74-75, 2016 DOI: 10.1016/j.ssnmr.2016.03.003

PY - 2016/4

Y1 - 2016/4

N2 - Electrochemical double-layer capacitors, or ‘supercapacitors’ are attracting increasing attention as high-power energy storage devices for a wide range of technological applications. These devices store charge through electrostatic interactions between liquid electrolyte ions and the surfaces of porous carbon electrodes. However, many aspects of the fundamental mechanism of supercapacitance are still not well understood, and there is a lack of experimental techniques which are capable of studying working devices. Recently, solid-state NMR has emerged as a powerful tool for studying the local environments and behaviour of electrolyte ions in supercapacitor electrodes. In this Trends article, we review these recent developments and applications. We first discuss the basic principles underlying the mechanism of supercapacitance, as well as the key NMR observables that are relevant to the study of supercapacitor electrodes. We then review some practical aspects of the study of working devices using ex situ and in situ methodologies and explain the key advances that these techniques have allowed on the study of supercapacitor charging mechanisms. NMR experiments have revealed that the pores of the carbon electrodes contain a significant number of electrolyte ions in the absence of any charging potential. This has important implications for the molecular mechanisms of supercapacitance, as charge can be stored by different ion adsorption/desorption processes. Crucially, we show how in situ NMR experiments can be used to quantitatively study and characterise the charging mechanism, with the experiments providing the most detailed picture of charge storage to date, offering the opportunity to design enhanced devices. Finally, an outlook for future directions for solid-state NMR in supercapacitor research is offered.

AB - Electrochemical double-layer capacitors, or ‘supercapacitors’ are attracting increasing attention as high-power energy storage devices for a wide range of technological applications. These devices store charge through electrostatic interactions between liquid electrolyte ions and the surfaces of porous carbon electrodes. However, many aspects of the fundamental mechanism of supercapacitance are still not well understood, and there is a lack of experimental techniques which are capable of studying working devices. Recently, solid-state NMR has emerged as a powerful tool for studying the local environments and behaviour of electrolyte ions in supercapacitor electrodes. In this Trends article, we review these recent developments and applications. We first discuss the basic principles underlying the mechanism of supercapacitance, as well as the key NMR observables that are relevant to the study of supercapacitor electrodes. We then review some practical aspects of the study of working devices using ex situ and in situ methodologies and explain the key advances that these techniques have allowed on the study of supercapacitor charging mechanisms. NMR experiments have revealed that the pores of the carbon electrodes contain a significant number of electrolyte ions in the absence of any charging potential. This has important implications for the molecular mechanisms of supercapacitance, as charge can be stored by different ion adsorption/desorption processes. Crucially, we show how in situ NMR experiments can be used to quantitatively study and characterise the charging mechanism, with the experiments providing the most detailed picture of charge storage to date, offering the opportunity to design enhanced devices. Finally, an outlook for future directions for solid-state NMR in supercapacitor research is offered.

KW - Energy storage

KW - Supercapacitors

KW - Solid-state NMR

KW - Ring Currents

KW - In situ NMR

KW - Charging mechanisms

KW - Microporous carbon

KW - Ionic

KW - Liquids

U2 - 10.1016/j.ssnmr.2016.03.003

DO - 10.1016/j.ssnmr.2016.03.003

M3 - Journal article

VL - 74-75

SP - 16

EP - 35

JO - Solid State Nuclear Magnetic Resonance

JF - Solid State Nuclear Magnetic Resonance

SN - 0926-2040

ER -