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Battery with bifunctional electrolyte

An electrolyte and battery technology, applied in the direction of aqueous electrolyte fuel cells, acidic electrolytes, aqueous electrolytes, etc., can solve the problems of reducing conductivity and blocking electrodes

Inactive Publication Date: 2008-12-17
ITI SCOTLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, the use of alkaline electrolytes in such electrodes often leads to the uptake of carbon dioxide, and thus to the formation of carbonates, which in turn tends to reduce conductivity and clog the pores in the active surface of the electrode

Method used

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  • Battery with bifunctional electrolyte
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Embodiment Construction

[0021] The present inventors have discovered that batteries can be fabricated in which the acidic electrolyte has a compound that (a) provides acidity to the electrolyte and (b) increases the solubility of at least one metal ion of the metal forming the redox couple. Solubility is preferably increased by complex or salt formation. Viewed from another point of view, the inventors have discovered that compounds that increase the solubility of selected metals (and especially in ionic form) in the electrolyte will advantageously allow the use of what would otherwise be considered an important role in batteries (and especially secondary batteries) with acidic electrolytes. ) Redox couples of unsuitable redox couples.

[0022] As used herein, the term "acidic electrolyte" refers to an electrolyte (ie, a conductive solution) having a pH of less than 7.0 and more typically less than 4.0. The term "redox pair" is also used herein interchangeably with the term "redox couple" and refers...

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Abstract

A battery comprises an acid electrolyte in which a compound provides acidity to the electrolyte and further increases solubility of at least one metal in the redox pair. Especially preferred compounds include alkyl sulfonic acids, amine sulfonic acids, and alkyl phosphonic acids, and particularly preferred redox coupled include Co<3+> / Zn<0>, Mn<3+> / Zn<0>, Ce<4+> / V<2+>, Ce<4+> / Ti<3+>, Ce<4+> / Zn<0>, and Pb<4+> / Pb<0>.

Description

[0001] This application is a continuation-in-part of previously granted application serial number 10 / 418,678, filed April 17, 2003, which previously issued application serial number PCT / US01 / 41678, filed August 10, 2001 A continuation-in-part of International Patent Application (published February 27, 2003 as WO 03 / 017407), and this application further claims priority to U.S. Provisional Patent Serial No. 60 / 373,733, filed April 17, 2002, Both are incorporated herein by reference. technical field [0002] The field of the invention is batteries, and in particular redox flow cells. Background technique [0003] Many types of batteries and other power cells are known based on a relatively wide range of electrical pairs. Those pairs that contain zinc are among the most popular. Zinc is considered to be the highest energy pair component that can be cycled in aqueous room temperature batteries and is therefore commonly used in numerous battery and energy pool applications. Dep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/20H01M4/86H01M4/96H01M8/18H01M10/36
CPCH01M4/8631H01M4/96H01M6/045H01M8/08H01M8/188H01M8/20H01M10/36H01M2300/0005Y02E60/10Y02E60/50
Inventor 罗伯特·L·克拉克布赖恩·J·多尔蒂斯蒂芬·哈里森J·彼得·米林顿萨马里什·莫汉塔
Owner ITI SCOTLAND