Operating a redox flow battery with a negative electrolyte imbalance

Pham, Quoc; Chang, On; Durairaj, Sumitha

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

Patent · Tue Mar 31 00:00:00 EDT 2015

OSTI ID:1177112

Pham, Quoc; Chang, On; Durairaj, Sumitha

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.

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Research Organization:: EnerVault Corporation, Sunnyvale, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: OE0000225

Assignee:: EnerVault Corporation (Sunnyvale, CA)

Patent Number(s):: 8,993,183

Application Number:: 14/095,362

OSTI ID:: 1177112

Resource Relation:: Patent File Date: 2013 Dec 03

Country of Publication:: United States

Language:: English

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