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Title: Rational Evaluation and Cycle Life Improvement of Quinone-Based Aqueous Flow Batteries Guided by In-Line Optical Spectrophotometry

Abstract

We measure electrolyte concentration and state-of-charge in real time in an operating aqueous anthraquinone-based flow battery using in-line optical spectrophotometry. By capitalizing on the linear transition in absorption spectra between oxidized and reduced states, we show how discontinuous capacity fade rates in redox flow batteries can be caused by a transition from one capacity-limiting electrolyte to the other, which is caused by reactant crossover. With this insight, we demonstrate an electrolyte-balancing scheme, which can be broadly applicable to flow battery systems with asymmetric electrolyte crossover rates.

Authors:
 [1];  [1]; ORCiD logo [1]
  1. Harvard Univ., Cambridge, MA (United States). School of Engineering and Applied Sciences (SEAS)
Publication Date:
Research Org.:
Harvard Univ., Cambridge, MA (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1510076
Grant/Contract Number:  
AR0000348; AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
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; energy storage; in-line optical spectrophotometry; redox-flow batteries

Citation Formats

Kwabi, David G., Wong, Andrew A., and Aziz, Michael J. Rational Evaluation and Cycle Life Improvement of Quinone-Based Aqueous Flow Batteries Guided by In-Line Optical Spectrophotometry. United States: N. p., 2018. Web. doi:10.1149/2.0791809jes.
Kwabi, David G., Wong, Andrew A., & Aziz, Michael J. Rational Evaluation and Cycle Life Improvement of Quinone-Based Aqueous Flow Batteries Guided by In-Line Optical Spectrophotometry. United States. doi:10.1149/2.0791809jes.
Kwabi, David G., Wong, Andrew A., and Aziz, Michael J. Tue . "Rational Evaluation and Cycle Life Improvement of Quinone-Based Aqueous Flow Batteries Guided by In-Line Optical Spectrophotometry". United States. doi:10.1149/2.0791809jes. https://www.osti.gov/servlets/purl/1510076.
@article{osti_1510076,
title = {Rational Evaluation and Cycle Life Improvement of Quinone-Based Aqueous Flow Batteries Guided by In-Line Optical Spectrophotometry},
author = {Kwabi, David G. and Wong, Andrew A. and Aziz, Michael J.},
abstractNote = {We measure electrolyte concentration and state-of-charge in real time in an operating aqueous anthraquinone-based flow battery using in-line optical spectrophotometry. By capitalizing on the linear transition in absorption spectra between oxidized and reduced states, we show how discontinuous capacity fade rates in redox flow batteries can be caused by a transition from one capacity-limiting electrolyte to the other, which is caused by reactant crossover. With this insight, we demonstrate an electrolyte-balancing scheme, which can be broadly applicable to flow battery systems with asymmetric electrolyte crossover rates.},
doi = {10.1149/2.0791809jes},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 9,
volume = 165,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
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Works referenced in this record:

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