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Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy

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Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy. / Forse, Alexander C.; Griffin, John M.; Merlet, Celine et al.
In: Nature Energy, Vol. 2, No. 3, 16216, 06.02.2017.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Forse, AC, Griffin, JM, Merlet, C, Carretero-Gonzalez, J, Raji, A-RO, Trease, NM & Grey, CP 2017, 'Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy', Nature Energy, vol. 2, no. 3, 16216. https://doi.org/10.1038/nenergy.2016.216

APA

Forse, A. C., Griffin, J. M., Merlet, C., Carretero-Gonzalez, J., Raji, A-R. O., Trease, N. M., & Grey, C. P. (2017). Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy. Nature Energy, 2(3), Article 16216. https://doi.org/10.1038/nenergy.2016.216

Vancouver

Forse AC, Griffin JM, Merlet C, Carretero-Gonzalez J, Raji A-RO, Trease NM et al. Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy. Nature Energy. 2017 Feb 6;2(3):16216. doi: 10.1038/nenergy.2016.216

Author

Forse, Alexander C. ; Griffin, John M. ; Merlet, Celine et al. / Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy. In: Nature Energy. 2017 ; Vol. 2, No. 3.

Bibtex

@article{8af276308b44459eb61957ba27b6b1fb,
title = "Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy",
abstract = "Ionic transport inside porous carbon electrodes underpins the storage of energy in supercapacitors and the rate at which they can charge and discharge, yet few studies have elucidated the materials properties that influence ion dynamics. Here we use in situ pulsed field gradient NMR spectroscopy to measure ionic diffusion in supercapacitors directly. We find that confinement in the nanoporous electrode structures decreases the effective self-diffusion coefficients of ions by over two orders of magnitude compared with neat electrolyte, and in-pore diffusion is modulated by changes in ion populations at the electrode/electrolyte interface during charging. Electrolyte concentration and carbon pore size distributions also affect in-pore diffusion and the movement of ions in and out of the nanopores. In light of our findings we propose that controlling the charging mechanism may allow the tuning of the energy and power performances of supercapacitors for a range of different applications.",
keywords = "QUARTZ-CRYSTAL MICROBALANCE, DOUBLE-LAYER CAPACITORS, NANOPOROUS CARBON ELECTRODES, ELECTRICAL DOUBLE-LAYER, SOLID-STATE NMR, TRANSPORT-PROPERTIES, MAGNETIC-RESONANCE, MICROPOROUS CARBON, CHARGING DYNAMICS, ENERGY-STORAGE",
author = "Forse, {Alexander C.} and Griffin, {John M.} and Celine Merlet and Javier Carretero-Gonzalez and Raji, {Abdul-Rahman O.} and Trease, {Nicole M.} and Grey, {Clare P.}",
note = "{\textcopyright} 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.",
year = "2017",
month = feb,
day = "6",
doi = "10.1038/nenergy.2016.216",
language = "English",
volume = "2",
journal = "Nature Energy",
issn = "2058-7546",
publisher = "Nature Publishing Group",
number = "3",

}

RIS

TY - JOUR

T1 - Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy

AU - Forse, Alexander C.

AU - Griffin, John M.

AU - Merlet, Celine

AU - Carretero-Gonzalez, Javier

AU - Raji, Abdul-Rahman O.

AU - Trease, Nicole M.

AU - Grey, Clare P.

N1 - © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.

PY - 2017/2/6

Y1 - 2017/2/6

N2 - Ionic transport inside porous carbon electrodes underpins the storage of energy in supercapacitors and the rate at which they can charge and discharge, yet few studies have elucidated the materials properties that influence ion dynamics. Here we use in situ pulsed field gradient NMR spectroscopy to measure ionic diffusion in supercapacitors directly. We find that confinement in the nanoporous electrode structures decreases the effective self-diffusion coefficients of ions by over two orders of magnitude compared with neat electrolyte, and in-pore diffusion is modulated by changes in ion populations at the electrode/electrolyte interface during charging. Electrolyte concentration and carbon pore size distributions also affect in-pore diffusion and the movement of ions in and out of the nanopores. In light of our findings we propose that controlling the charging mechanism may allow the tuning of the energy and power performances of supercapacitors for a range of different applications.

AB - Ionic transport inside porous carbon electrodes underpins the storage of energy in supercapacitors and the rate at which they can charge and discharge, yet few studies have elucidated the materials properties that influence ion dynamics. Here we use in situ pulsed field gradient NMR spectroscopy to measure ionic diffusion in supercapacitors directly. We find that confinement in the nanoporous electrode structures decreases the effective self-diffusion coefficients of ions by over two orders of magnitude compared with neat electrolyte, and in-pore diffusion is modulated by changes in ion populations at the electrode/electrolyte interface during charging. Electrolyte concentration and carbon pore size distributions also affect in-pore diffusion and the movement of ions in and out of the nanopores. In light of our findings we propose that controlling the charging mechanism may allow the tuning of the energy and power performances of supercapacitors for a range of different applications.

KW - QUARTZ-CRYSTAL MICROBALANCE

KW - DOUBLE-LAYER CAPACITORS

KW - NANOPOROUS CARBON ELECTRODES

KW - ELECTRICAL DOUBLE-LAYER

KW - SOLID-STATE NMR

KW - TRANSPORT-PROPERTIES

KW - MAGNETIC-RESONANCE

KW - MICROPOROUS CARBON

KW - CHARGING DYNAMICS

KW - ENERGY-STORAGE

U2 - 10.1038/nenergy.2016.216

DO - 10.1038/nenergy.2016.216

M3 - Journal article

VL - 2

JO - Nature Energy

JF - Nature Energy

SN - 2058-7546

IS - 3

M1 - 16216

ER -