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

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