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Title: Operating a redox flow battery with a negative electrolyte imbalance

Abstract

Loss of flow battery electrode catalyst layers during self-discharge or charge reversal may be prevented by establishing and maintaining a negative electrolyte imbalance during at least parts of a flow battery's operation. Negative imbalance may be established and/or maintained actively, passively or both. Actively establishing a negative imbalance may involve detecting an imbalance that is less negative than a desired threshold, and processing one or both electrolytes until the imbalance reaches a desired negative level. Negative imbalance may be effectively established and maintained passively within a cell by constructing a cell with a negative electrode chamber that is larger than the cell's positive electrode chamber, thereby providing a larger quantity of negative electrolyte for reaction with positive electrolyte.

Inventors:
; ;
Publication Date:
Research Org.:
EnerVault Corporation, Sunnyvale, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1177112
Patent Number(s):
8,993,183
Application Number:
14/095,362
Assignee:
EnerVault Corporation (Sunnyvale, CA) NETL
DOE Contract Number:
OE0000225
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Dec 03
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Pham, Quoc, Chang, On, and Durairaj, Sumitha. Operating a redox flow battery with a negative electrolyte imbalance. United States: N. p., 2015. Web.
Pham, Quoc, Chang, On, & Durairaj, Sumitha. Operating a redox flow battery with a negative electrolyte imbalance. United States.
Pham, Quoc, Chang, On, and Durairaj, Sumitha. Tue . "Operating a redox flow battery with a negative electrolyte imbalance". United States. doi:. https://www.osti.gov/servlets/purl/1177112.
@article{osti_1177112,
title = {Operating a redox flow battery with a negative electrolyte imbalance},
author = {Pham, Quoc and Chang, On and Durairaj, Sumitha},
abstractNote = {Loss of flow battery electrode catalyst layers during self-discharge or charge reversal may be prevented by establishing and maintaining a negative electrolyte imbalance during at least parts of a flow battery's operation. Negative imbalance may be established and/or maintained actively, passively or both. Actively establishing a negative imbalance may involve detecting an imbalance that is less negative than a desired threshold, and processing one or both electrolytes until the imbalance reaches a desired negative level. Negative imbalance may be effectively established and maintained passively within a cell by constructing a cell with a negative electrode chamber that is larger than the cell's positive electrode chamber, thereby providing a larger quantity of negative electrolyte for reaction with positive electrolyte.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 31 00:00:00 EDT 2015},
month = {Tue Mar 31 00:00:00 EDT 2015}
}

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