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Electrolyte balance strategy for flow batteries

A liquid flow battery and water-based electrolyte technology, applied in battery electrodes, solid electrolyte fuel cells, fuel cells, etc., can solve problems such as system performance degradation

Active Publication Date: 2019-07-26
LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This imbalance, if not corrected, subsequently results in reduced system performance

Method used

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  • Electrolyte balance strategy for flow batteries
  • Electrolyte balance strategy for flow batteries
  • Electrolyte balance strategy for flow batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0082] Embodiment 1. A redox flow battery or other electrochemical device comprising at least one electrochemical cell in fluid communication with a balancing cell comprising:

[0083] a first half-cell compartment and a second half-cell compartment separated by a membrane,

[0084] wherein the first half-cell compartment comprises a first electrode in contact with a first aqueous electrolyte of the redox flow battery; and

[0085] wherein the second half-cell chamber comprises a second electrode in contact with a second aqueous electrolyte, the second electrode comprising a 2 catalyst.

Embodiment approach 2

[0086] Embodiment 2. A redox flow battery comprising at least one electrochemical cell in fluid communication with a balancing cell comprising:

[0087] a first half-cell compartment and a second half-cell compartment separated by a membrane,

[0088] wherein the first half-cell compartment comprises a first electrode in contact with a first aqueous electrolyte of the redox flow battery; and

[0089] wherein the second half-cell chamber contains a 2 the second electrode of the catalyst; and wherein

[0090] The second half-cell compartment does not contain (is free of) an aqueous electrolyte.

Embodiment approach 3

[0091] Embodiment 3. A redox flow battery or other electrochemical device comprising at least one electrochemical cell in fluid communication with a balancing cell comprising:

[0092] a first half-cell compartment and a second half-cell compartment separated by a membrane,

[0093] wherein the first half-cell compartment comprises a first electrode in contact with a first aqueous electrolyte of the redox flow battery; and

[0094] wherein the second half-cell chamber comprises a second electrode in contact with a second aqueous electrolyte, the second electrode comprising a 2 the catalyst of; and wherein said film comprises:

[0095] (1) Negatively charged ionomers, preferably negatively charged ionomers of the first and second classes, such as sulfonated perfluorinated polymers or copolymers;

[0096] (2) positively charged ionomers;

[0097] (3) Bipolar membranes; or

[0098] (4) A combination of (1)-(3).

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Abstract

The present invention relates to a redox flow battery comprising at least one electrochemical cell in fluid communication with a balancing cell comprising: a first half-cell compartment and a second half-cell compartment, wherein the first half-cell compartment comprises a a first electrode in contact with the first aqueous electrolyte of the redox flow battery; and wherein the second half-cell chamber comprises a second electrode in contact with the second aqueous electrolyte, the second electrode comprising a 2 catalyst.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from US Patent Application Serial No. 61 / 882,324, filed September 25, 2013, the contents of which are hereby incorporated by reference in their entirety for any and all purposes. technical field [0003] The present invention relates to redox flow batteries and methods of their operation. Background technique [0004] Flow batteries are electrochemical energy storage systems in which electrochemical reactants, usually redox-active compounds, are dissolved in a liquid electrolyte contained in a negative electrolyte or a negative electrolyte (negolyte) and a positive electrolyte ( positive electrolyte) or positive electrolyte (posolyte) loop and circulate through the reaction cell, in the reaction cell through the reduction reaction and oxidation reaction, the electrical energy is converted into the chemical potential energy of the reactant or extracted from the chemical po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1023H01M8/1039H01M8/1051H01M8/1053H01M8/18H01M8/20H01M4/90H01M8/04223
CPCH01M8/20H01M8/1023H01M8/1039H01M8/1051H01M8/1053H01M8/188H01M4/9016H01M8/04238Y02E60/50H01M8/10H01M8/0693
Inventor 史蒂文·Y·里斯帕拉瓦斯图·巴迪日纳瑞雅南尼廷·泰尔吉蒂莫西·B·格瑞泰克
Owner LOCKHEED MARTIN ADVANCED ENERGY STORAGE