WO 2018/002588
`
`PCT/GB2017/051835
`
`Claims
`
`1.
`
`An electrode for an electrochemical cell, the electrode comprising electrode material
`
`disposed on a substrate, wherein the electrode material comprises electrocatalyst and a
`
`solid glass phase which binds the electrocatalyst to the substrate.
`
`2.
`
`An electrode according to claim 1, wherein the solid glass phase is sintered glass frit
`
`which constitutes at least 10wt% of the electrode material, preferably at least 15wt%.
`
`3.
`
`An electrode according to claim 1 or claim 2 wherein the glass is a silicate or
`
`borosilicate glass.
`
`4.
`
`An electrode according to any one of the preceding claims wherein the glass is
`
`substantially free of lead.
`
`5.
`
`An electrode according to any one of the preceding claims, wherein the
`
`electrocatalyst forms an interconnected network of electrocatalyst through the electrode
`
`material.
`
`6.
`
`An electrode according to any one of the preceding claims, wherein the electrode
`
`material forms a barrier on the surface of the substrate, thereby preventing contact between
`
`the electrolyte and the substrate in use.
`
`7.
`
`An electrode according to any one of the preceding claims wherein the electrode
`
`material comprises exposed electrocatalyst.
`
`1O
`
`15
`
`20
`
`25
`
`8.
`
`An electrode according to any one of the preceding claims wherein the
`
`electrocatalyst is an oxygen evolution reaction (OER) catalyst, an oxygen reduction reaction
`
`(ORR) catalyst, a hydrogen evolution reaction (HER) catalyst and/or an electrochlorination
`
`30
`
`catalyst.
`
`9.
`
`An electrode according to any one of the preceding claims wherein the glass is acid
`
`resistant.
`
`35
`
`10.
`
`An electrode according to any one of the preceding claims wherein the electrode
`
`material has pores and/or pits on an electrolyte-side surface thereof.
`
`23
`
`
`
`WO 2018/002588
`
`PCT/GB2017/051835
`
`11.
`
`An electrode according to any one of the preceding claims wherein the coefficient of
`
`thermal expansion (CTE) of the glass differs from the coefficient of thermal expansion (CTE)
`
`of the substrate by +/-10% or less.
`
`12.
`
`A method of making an electrode for an electrochemical cell comprising applying an
`
`electrode formulation comprising electrocatalyst and glass frit to a substrate and firing the
`
`electrode formulation.
`
`13.
`
`A method according to claim 12 wherein the electrode formulation includes at least
`
`10
`
`10wt% of the glass frit.
`
`14.
`
`A method according to claim 12 or claim 13 wherein the glass frit is a silicate or
`
`borosilicate glass.
`
`15.
`
`A method according to any one of claims 12 to 14 wherein the glass frit is
`
`substantially free of lead.
`
`16.
`
`A method according to any one of claims 12 to 15 wherein the method includes 3
`
`firing steps or fewer, preferably a single firing step.
`
`17.
`
`A method according to any one of claims 12 to 16 wherein the electrode formulation
`
`is applied to the substrate by printing one or more layers of electrode formulation onto the
`
`substrate, preferably by screen printing.
`
`18.
`
`A method according to any one of claims 12 to 17 wherein the firing step comprises
`
`heating to a temperature of not more than 120°C in excess of the temperature at which the
`
`glass begins to exhibit macroscopic glass flow.
`
`19.
`
`An electrochemical cell comprising an electrode as defined in any one of claims 1 to
`
`11 or obtainable by a method according to any one of claims 12 to 18.
`
`20.
`
`An electrochemical cell according to claim 19 which is an electrochlorination cell.
`
`15
`
`20
`
`25
`
`3O
`
`21.
`
`Use of an electrochemical cell according to claim 19 or 20 for the disinfection of
`
`35
`
`water.
`
`24
`
`
`
`WO 2018/002588
`
`PCT/GB2017/051835
`
`22.
`
`A method for the manufacture of an electrochemical cell, comprising making an
`
`electrode by a method according to any one of claims 12 to 18.
`
`23.
`
`A method according to claim 22 wherein the electrochemical cell is an
`
`electrochlorination cell.
`
`25
`
`
Still Working On It
This document is taking longer than usual to download. This can
happen if we need to contact the court directly to obtain the
document and their servers are running slowly.
Give it another minute or two to complete, and then try the
refresh button.
Sealed Document
We are unable to display this document, it may be under a court
ordered seal.
If you have proper credentials to access the file, you may proceed
directly to the court's system using your government issued username
and password.
Access Government Site
