Exploring the role of electrode microstructure on the performance of non-aqueous redox flow batteries

Antoni Forner Cuenca, Emily E. Penn, Alexandra M. Oliveira, Fikile R. Brushett (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

Redox flow batteries are an emerging technology for long-duration grid energy storage, but further cost reductions are needed to accelerate adoption. Improving electrode performance within the electrochemical stack offers a pathway to reduced system cost through decreased resistance and increased power density. To date, most research efforts have focused on modifying the surface chemistry of carbon electrodes to enhance reaction kinetics, electrochemically active surface area, and wettability. Less attention has been given to electrode microstructure, which has a significant impact on reactant distribution and pressure drop within the flow cell. Here, drawing from commonly used carbon-based diffusion media (paper, felt, cloth), we systematically investigate the influence of electrode microstructure on electrochemical performance. We employ a range of techniques to characterize the microstructure, pressure drop, and electrochemically active surface area in combination with in-operando diagnostics performed in a single electrolyte flow cell using a kinetically facile redox couple dissolved in a non-aqueous electrolyte. Of the materials tested, the cloth electrode shows the best performance; the highest current density at a set overpotential accompanied by the lowest hydraulic resistance. We hypothesize that the bimodal pore size distribution and periodic, well-defined microstructure of the cloth are key to lowering mass transport resistance.
TaalEngels
Pagina'sA2230-A2241
Aantal pagina's12
TijdschriftJournal of the Electrochemical Society
Volume166
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 2019
Extern gepubliceerdJa

Vingerafdruk

Microstructure
Electrodes
Electrolytes
Pressure drop
Carbon
Cost reduction
Surface chemistry
Reaction kinetics
Energy storage
Pore size
Wetting
Current density
Mass transfer
Hydraulics
Flow batteries
Costs

Citeer dit

Forner Cuenca, Antoni ; Penn, Emily E. ; Oliveira, Alexandra M. ; Brushett, Fikile R./ Exploring the role of electrode microstructure on the performance of non-aqueous redox flow batteries. In: Journal of the Electrochemical Society. 2019 ; Vol. 166, Nr. 10. blz. A2230-A2241
@article{36949be247e94d859a1577b86094250e,
title = "Exploring the role of electrode microstructure on the performance of non-aqueous redox flow batteries",
abstract = "Redox flow batteries are an emerging technology for long-duration grid energy storage, but further cost reductions are needed to accelerate adoption. Improving electrode performance within the electrochemical stack offers a pathway to reduced system cost through decreased resistance and increased power density. To date, most research efforts have focused on modifying the surface chemistry of carbon electrodes to enhance reaction kinetics, electrochemically active surface area, and wettability. Less attention has been given to electrode microstructure, which has a significant impact on reactant distribution and pressure drop within the flow cell. Here, drawing from commonly used carbon-based diffusion media (paper, felt, cloth), we systematically investigate the influence of electrode microstructure on electrochemical performance. We employ a range of techniques to characterize the microstructure, pressure drop, and electrochemically active surface area in combination with in-operando diagnostics performed in a single electrolyte flow cell using a kinetically facile redox couple dissolved in a non-aqueous electrolyte. Of the materials tested, the cloth electrode shows the best performance; the highest current density at a set overpotential accompanied by the lowest hydraulic resistance. We hypothesize that the bimodal pore size distribution and periodic, well-defined microstructure of the cloth are key to lowering mass transport resistance.",
author = "{Forner Cuenca}, Antoni and Penn, {Emily E.} and Oliveira, {Alexandra M.} and Brushett, {Fikile R.}",
year = "2019",
doi = "10.1149/2.0611910jes",
language = "English",
volume = "166",
pages = "A2230--A2241",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "10",

}

Exploring the role of electrode microstructure on the performance of non-aqueous redox flow batteries. / Forner Cuenca, Antoni; Penn, Emily E.; Oliveira, Alexandra M.; Brushett, Fikile R. (Corresponding author).

In: Journal of the Electrochemical Society, Vol. 166, Nr. 10, 2019, blz. A2230-A2241.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Exploring the role of electrode microstructure on the performance of non-aqueous redox flow batteries

AU - Forner Cuenca,Antoni

AU - Penn,Emily E.

AU - Oliveira,Alexandra M.

AU - Brushett,Fikile R.

PY - 2019

Y1 - 2019

N2 - Redox flow batteries are an emerging technology for long-duration grid energy storage, but further cost reductions are needed to accelerate adoption. Improving electrode performance within the electrochemical stack offers a pathway to reduced system cost through decreased resistance and increased power density. To date, most research efforts have focused on modifying the surface chemistry of carbon electrodes to enhance reaction kinetics, electrochemically active surface area, and wettability. Less attention has been given to electrode microstructure, which has a significant impact on reactant distribution and pressure drop within the flow cell. Here, drawing from commonly used carbon-based diffusion media (paper, felt, cloth), we systematically investigate the influence of electrode microstructure on electrochemical performance. We employ a range of techniques to characterize the microstructure, pressure drop, and electrochemically active surface area in combination with in-operando diagnostics performed in a single electrolyte flow cell using a kinetically facile redox couple dissolved in a non-aqueous electrolyte. Of the materials tested, the cloth electrode shows the best performance; the highest current density at a set overpotential accompanied by the lowest hydraulic resistance. We hypothesize that the bimodal pore size distribution and periodic, well-defined microstructure of the cloth are key to lowering mass transport resistance.

AB - Redox flow batteries are an emerging technology for long-duration grid energy storage, but further cost reductions are needed to accelerate adoption. Improving electrode performance within the electrochemical stack offers a pathway to reduced system cost through decreased resistance and increased power density. To date, most research efforts have focused on modifying the surface chemistry of carbon electrodes to enhance reaction kinetics, electrochemically active surface area, and wettability. Less attention has been given to electrode microstructure, which has a significant impact on reactant distribution and pressure drop within the flow cell. Here, drawing from commonly used carbon-based diffusion media (paper, felt, cloth), we systematically investigate the influence of electrode microstructure on electrochemical performance. We employ a range of techniques to characterize the microstructure, pressure drop, and electrochemically active surface area in combination with in-operando diagnostics performed in a single electrolyte flow cell using a kinetically facile redox couple dissolved in a non-aqueous electrolyte. Of the materials tested, the cloth electrode shows the best performance; the highest current density at a set overpotential accompanied by the lowest hydraulic resistance. We hypothesize that the bimodal pore size distribution and periodic, well-defined microstructure of the cloth are key to lowering mass transport resistance.

U2 - 10.1149/2.0611910jes

DO - 10.1149/2.0611910jes

M3 - Article

VL - 166

SP - A2230-A2241

JO - Journal of the Electrochemical Society

T2 - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 10

ER -