Solid buffer materials for electrolyte solutions and flow batteries utilizing same

A buffer material and battery pack technology, applied in fuel cells, aqueous electrolytes, alkaline electrolytes, etc., can solve the problems of reducing the saturation concentration of hexacyanide complexes and complicating the solubility curve.

Inactive Publication Date: 2017-09-26
LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While buffers do help resist unwanted pH changes in electrolyte solutions, dissolved buffer materials can undesirably reduce the saturation concentration of the ferric hexacyanoide complex and further complicate an already challenging solubility profile

Method used

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  • Solid buffer materials for electrolyte solutions and flow batteries utilizing same
  • Solid buffer materials for electrolyte solutions and flow batteries utilizing same
  • Solid buffer materials for electrolyte solutions and flow batteries utilizing same

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Embodiment Construction

[0018] The present disclosure relates, in part, to compositions comprising dissolved ferric hexacyanoride complexes and solid buffer materials. The present disclosure also relates, in part, to electrolyte solutions and flow batteries comprising dissolved ferric hexacyanoride complexes and solid buffer materials. The present disclosure also relates in part to electrolyte solutions and flow batteries comprising dissolved electroactive materials and solid buffer materials.

[0019] The present disclosure can be understood more readily by reference to the following description taken in conjunction with the accompanying drawings and examples, all of which form a part of this disclosure. It will be understood that this disclosure is not limited to the specific products, methods, conditions or parameters described and / or illustrated herein. Furthermore, the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to b...

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Abstract

Electrolyte solutions for flow batteries and other electrochemical systems can contain a dissolved iron hexacyanide complex as an active material. Alkaline buffering can be desirable in such electrolyte solutions to promote stability of the active material. However, the buffer material can undesirably decrease solubility of the iron hexacyanide complex to unacceptable levels in some instances. Compositions with increased concentrations of iron hexacyanide can include an aqueous solution containing a dissolved iron hexacyanide complex, and a solid buffer material in contact with the aqueous solution. The solid buffer material is present at an amount greater than that needed to produce a saturation concentration of the solid buffer material in the aqueous solution. Flow batteries and other electrochemical systems can contain the compositions as an electrolyte solution. Electrolyte solutions containing active materials other than an iron hexacyanide complex can also be stabilized by using an appropriate solid buffer material.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 62 / 105,768, filed January 21, 2015, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates generally to energy storage and, more particularly, to flow batteries and other electrochemical systems comprising coordination compounds as active materials within electrolyte solutions. Background technique [0004] Electrochemical energy storage systems such as batteries, supercapacitors, etc. have been widely proposed for large-scale energy storage applications. To this end, various battery designs including flow batteries have been employed. Compared to other types of electrochemical energy storage systems, flow batteries are particularly advantageous for large-scale applications due to their ability to decouple the parameters of power density and energy density from ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/20C01C3/08C01C3/12
CPCH01M2300/0014H01M8/188H01M8/20Y02E60/50
Inventor 约翰·戈尔茨
Owner LOCKHEED MARTIN ADVANCED ENERGY STORAGE
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