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Title: Investigating a Bromide Supported Electrolyte for an All-Copper Flow Battery

Abstract

This work investigates a bromide supported electrolyte for use in an all-copper flow battery (CuFB). In this battery, halide ions stabilize the cuprous ion. During charge, the cuprous halide complex is reduced to copper metal at the negative electrode and the complex is oxidized to a cupric halide complex at the positive electrode. Our measurements indicated that the CuFB utilizing a bromide electrolyte can achieve a higher open circuit potential (OCP) as compared to using a chloride electrolyte. The CuFB has negligible hydrogen and bromine evolution indicating that high coulombic efficiencies are achievable. A bromide supported all-CuFB with graphitic porous felt electrodes was demonstrated and the OCP after the initial charge was observed to be 0.81 V. The cell was cycled with a geometric current density of 150 mA cm -2 for 50 cycles with state of charge swings of 0 to 60%, and had a voltaic efficiency ( i = 1 j V d i s c h a r g e j i = 1 k V c h a r g e k ) of 64%, however, copper electrodeposits were nodular and non-adherent to the substrate. We conclude that further understanding of plating morphology and the effect of substrates are necessary to take advantage of this chemistry in a conventional hybrid battery configuration, and that this system could benefit from a slurry electrode.

Authors:
ORCiD logo; ; ORCiD logo;
Publication Date:
Research Org.:
Case Western Reserve Univ., Cleveland, OH (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Electricity Delivery and Energy Reliability (OE)
OSTI Identifier:
1454337
Alternate Identifier(s):
OSTI ID: 1505145
Grant/Contract Number:  
AR0000352
Resource Type:
Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society Journal Volume: 165 Journal Issue: 9; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; cuprous halides; hybrid flow batteries; large-scale energy storage

Citation Formats

Stricker, E. A., Krueger, K. W., Savinell, R. F., and Wainright, J. S. Investigating a Bromide Supported Electrolyte for an All-Copper Flow Battery. United States: N. p., 2018. Web. doi:10.1149/2.1031809jes.
Stricker, E. A., Krueger, K. W., Savinell, R. F., & Wainright, J. S. Investigating a Bromide Supported Electrolyte for an All-Copper Flow Battery. United States. doi:10.1149/2.1031809jes.
Stricker, E. A., Krueger, K. W., Savinell, R. F., and Wainright, J. S. Thu . "Investigating a Bromide Supported Electrolyte for an All-Copper Flow Battery". United States. doi:10.1149/2.1031809jes.
@article{osti_1454337,
title = {Investigating a Bromide Supported Electrolyte for an All-Copper Flow Battery},
author = {Stricker, E. A. and Krueger, K. W. and Savinell, R. F. and Wainright, J. S.},
abstractNote = {This work investigates a bromide supported electrolyte for use in an all-copper flow battery (CuFB). In this battery, halide ions stabilize the cuprous ion. During charge, the cuprous halide complex is reduced to copper metal at the negative electrode and the complex is oxidized to a cupric halide complex at the positive electrode. Our measurements indicated that the CuFB utilizing a bromide electrolyte can achieve a higher open circuit potential (OCP) as compared to using a chloride electrolyte. The CuFB has negligible hydrogen and bromine evolution indicating that high coulombic efficiencies are achievable. A bromide supported all-CuFB with graphitic porous felt electrodes was demonstrated and the OCP after the initial charge was observed to be 0.81 V. The cell was cycled with a geometric current density of 150 mA cm-2 for 50 cycles with state of charge swings of 0 to 60%, and had a voltaic efficiency ( ∑ i = 1 j V d i s c h a r g e j ∑ i = 1 k V c h a r g e k ) of 64%, however, copper electrodeposits were nodular and non-adherent to the substrate. We conclude that further understanding of plating morphology and the effect of substrates are necessary to take advantage of this chemistry in a conventional hybrid battery configuration, and that this system could benefit from a slurry electrode.},
doi = {10.1149/2.1031809jes},
journal = {Journal of the Electrochemical Society},
number = 9,
volume = 165,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1149/2.1031809jes

Citation Metrics:
Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: The all copper battery is shown during charging with a cationic membrane and without a porous electrode. During charging Cu+ is reduced to Cu0 on the negative electrode and Cu+ is oxidized to Cu2+ on the positive electrode.

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