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Metal complexes of substituted catecholates and redox flow batteries containing the same

A flow battery, catechol technology, applied in fuel cells, titanium organic compounds, circuits, etc., can solve the problems of flow battery technology that has not yet realized the combination of characteristics, reduced round-trip energy efficiency, and poor cycle life.

Inactive Publication Date: 2017-08-29
LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing flow batteries have suffered from their dependence on battery chemistry and battery designs that result in high battery resistance and / or active species passing through the membrane and mixing with the opposing electrolyte solution
This phenomenon is one of the factors leading to lower energy storage performance (e.g., round-trip energy efficiency) and poor cycle life
Despite significant development efforts, industrially viable flow battery technologies have yet to achieve this desired combination of properties.

Method used

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  • Metal complexes of substituted catecholates and redox flow batteries containing the same
  • Metal complexes of substituted catecholates and redox flow batteries containing the same
  • Metal complexes of substituted catecholates and redox flow batteries containing the same

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Embodiment

[0128] The substituted catecholate ligands described above can be prepared using conventional coupling reactions using readily available starting materials. For example, 1,2,3-trihydroxybenzene and 1,2,4-trihydroxybenzene are commercially available and can be functionalized to prepare some of the substituted catecholate ligands described herein. Similarly, d,l-3,4-dihydroxymandelic acid, protocatechualdehyde or protocatechuic acid (see for example figure 2 ) can be used as a starting material for the preparation of some of the substituted catecholate ligands described herein. In some cases it is advantageous to protect the 1,2-hydroxyl groups of the catechol backbone prior to further functionalization, for example by reaction with ethylene or propylene glycol. Acyclic protecting group strategies can also be used. Similarly, alpha-hydroxycatechol carboxylic acids, catecholamines, polyols, polyolcarboxy acids, amino acids, and amines are also commercially or synthetically ava...

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Abstract

Active materials for flow batteries can include various coordination compounds formed from transition metals. Some compositions containing coordination compounds can include a substituted catecholate ligand having a structure of in a neutral form or a salt form, in which Z is a heteroatom functional group bound to the substituted catecholate ligand at an open aromatic ring position and n is an integer ranging between 1 and 4. When more than one Z is present, each Z can be the same or different. Electrolyte solutions can include such coordination compounds, and such electrolyte solutions can be incorporated within a flow battery.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from US Provisional Patent Application No. 62 / 084,638, filed November 26, 2014, which is hereby incorporated by reference in its entirety. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. technical field [0005] The present invention relates generally to energy storage, and more particularly to flow batteries and flow battery systems containing coordination compounds. Background technique [0006] Electrochemical energy storage systems such as batteries, supercapacitors, etc. have been widely implemented for large-scale energy storage applications. Various battery designs, including flow batteries, have been employed for this purpose. Compared to other types of electrochemical energy storage systems, flow batteries may be advantageous, especially for large-scale applications, due to their ability to decouple the paramet...

Claims

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Application Information

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IPC IPC(8): C07F7/28
CPCH01M8/188H01M2300/0002Y02E60/50C07F7/28
Inventor 史蒂文·Y·里斯
Owner LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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