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Title: Method and system to maintain electrolyte stability for all-iron redox flow batteries

Abstract

Methods and systems are provided which maintain the positive and negative electrolyte pH and stability of a redox flow battery through the use of electrochemical rebalancing cells. The electrochemical cells may be activated by applying an electrical load to affect changes to the pH of the electrolytes. The use of the electrochemical cells improves long term performance stability redox flow batteries by decreasing and/or eliminating Fe(OH)3 precipitation formation.

Inventors:
;
Issue Date:
Research Org.:
ESS Tech, Inc., Wilsonville, OR (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1651009
Patent Number(s):
10680268
Application Number:
16/196,332
Assignee:
ESS Tech, Inc. (Wilsonville, OR)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
AR0000261
Resource Type:
Patent
Resource Relation:
Patent File Date: 11/20/2018
Country of Publication:
United States
Language:
English

Citation Formats

Evans, Craig E., and Song, Yang. Method and system to maintain electrolyte stability for all-iron redox flow batteries. United States: N. p., 2020. Web.
Evans, Craig E., & Song, Yang. Method and system to maintain electrolyte stability for all-iron redox flow batteries. United States.
Evans, Craig E., and Song, Yang. Tue . "Method and system to maintain electrolyte stability for all-iron redox flow batteries". United States. https://www.osti.gov/servlets/purl/1651009.
@article{osti_1651009,
title = {Method and system to maintain electrolyte stability for all-iron redox flow batteries},
author = {Evans, Craig E. and Song, Yang},
abstractNote = {Methods and systems are provided which maintain the positive and negative electrolyte pH and stability of a redox flow battery through the use of electrochemical rebalancing cells. The electrochemical cells may be activated by applying an electrical load to affect changes to the pH of the electrolytes. The use of the electrochemical cells improves long term performance stability redox flow batteries by decreasing and/or eliminating Fe(OH)3 precipitation formation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {6}
}

Patent:

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