US2007207350A1PendingUtilityA1

Method of Performing Electrochemical Reaction

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Individually held — no corporate assignee on recordPriority: Dec 19, 2003Filed: Dec 20, 2004Published: Sep 6, 2007
Est. expiryDec 19, 2023(expired)· nominal 20-yr term from priority
Inventors:Donald James Highgate
H01M 8/04H01M 8/10C25B 9/77C25B 15/02C25B 9/23C25B 1/04C25B 9/73Y02E60/50H01M 8/1023Y02E60/36H01M 8/1048H01M 8/0693H01M 8/04276H01M 8/04119
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Claims

Abstract

A method of performing an electrochemical reaction in an electrochemical cell comprising electrodes separated by a hydrophilic ion-exchange membrane, comprises conducting the reaction in the presence of an aqueous solution of an electrolyte of which the concentration is controlled.

Claims

exact text as granted — not AI-modified
1 . A method of performing an electrochemical reaction in an electrochemical cell comprising electrodes separated by a hydrophilic ion-exchange membrane, wherein the reaction is conducted in the presence of an aqueous solution of an electrolyte of which the concentration is controlled.  
     
     
         2 . The method according to  claim 1 , wherein the degree of hydration of the membrane is controlled.  
     
     
         3 . The method according to  claim 2 , wherein the degree of hydration is controlled by removing water from the membrane.  
     
     
         4 . The method according to  claim 3 , wherein the degree of hydration is controlled by evaporating water from the membrane.  
     
     
         5 . The method according to  claim 2 , wherein water is a reactant and the input of water into the cell is controlled.  
     
     
         6 . The method according to  claim 1 , wherein the electrolyte is toluenesulphonic acid, vinylsulphonic acid, acrylamido-(2-methyl)propanesulphonic acid, sodium hydroxide or potassium hydroxide.  
     
     
         7 . The method according to  claim 1 , wherein the hydrophilic material is ionically inactive.  
     
     
         8 . The method according to  claim 1 , wherein the hydrophilic material is ionically active.  
     
     
         9 . The method according to  claim 1 , wherein the hydrophilic material is a polymeric material.  
     
     
         10 . The method according to  claim 9 , wherein the hydrophilic material is obtainable by the polymerisation of monomers including methyl methacrylate, N-vinyl-2-pyrrolidone or acrylonitrile.  
     
     
         11 . The method according to  claim 9 , wherein the hydrophilic material is cross-linked.  
     
     
         12 . The method according to  claim 1 , wherein the cell is a fuel cell or an electrolyser.  
     
     
         13 . The method according to  claim 1 , wherein the cell is in the form of a membrane-electrode assembly (MEA), or a stack of MEAs.  
     
     
         14 . The method according to  claim 1 , wherein the concentration is controlled by the addition of further electrolyte.

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