Patents by Inventor David A. Brereton
David A. Brereton has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11139482Abstract: An electrocatalyst material comprising: (i) a support material comprising a plurality of individual support particles or aggregates; (ii) first particles comprising a first metal and an alloying metal; and (iii) second particles consisting of a second metal or a second metal oxide, wherein the second metal is platinum or iridium; wherein each individual support particle or aggregate has dispersed thereon first particles and second particles, characterised in that the mean average particle size of the second particles is smaller than the mean average particle size of the first particles is disclosed. The electrocatalyst material has particular use in an electrode, such as the cathode, of an electrochemical cell, such as a fuel cell.Type: GrantFiled: May 25, 2017Date of Patent: October 5, 2021Assignee: Johnson Matthey Fuel Cells LimitedInventors: Jonathan David Brereton Sharman, Alejandro Martinez Bonastre, Geoffrey Spikes
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Publication number: 20210296656Abstract: A catalyst layer includes (i) an electrocatalyst, and (ii) a water electrolysis catalyst, iridium or iridium oxide and one or more metals M or an oxide thereof, wherein M is selected from transition metals and/or Sn, with the exception of ruthenium. Such a catalyst layer has utility in fuel cells that experience high electrochemical potentials.Type: ApplicationFiled: March 15, 2021Publication date: September 23, 2021Inventors: Jonathan David Brereton Sharman, Brian Ronald Theobald, David Thompsett, Edward Anthony Wright
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Patent number: 10811716Abstract: An ion-conducting membrane includes: (i) a first ion-conducting layer including one or more first ion-conducting polymers; and (ii) a barrier layer including graphene-based platelets.Type: GrantFiled: July 10, 2013Date of Patent: October 20, 2020Assignee: Johnson Matthey Fuel Cells LimitedInventors: Jonathan Charles Frost, Jonathan David Brereton Sharman, Nadia Michele Permogorov
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Publication number: 20200321622Abstract: An electrocatalyst material comprising: (i) a support material comprising a plurality of individual support particles or aggregates; (ii) first particles comprising a first metal and an alloying metal; and (iii) second particles consisting of a second metal or a second metal oxide, wherein the second metal is platinum or iridium; wherein each individual support particle or aggregate has dispersed thereon first particles and second particles, characterised in that the mean average particle size of the second particles is smaller than the mean average particle size of the first particles is disclosed. The electrocatalyst material has particular use in an electrode, such as the cathode, of an electrochemical cell, such as a fuel cell.Type: ApplicationFiled: May 25, 2017Publication date: October 8, 2020Inventors: Jonathan David Brereton SHARMAN, Alejandro MARTINEZ BONASTRE, Geoffrey SPIKES
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Patent number: 10424795Abstract: A porous gas diffusion substrate that includes: (a) a porous non-woven web comprising carbon fibers; and (b) a carbonaceous residue; wherein the carbonaceous residue is embedded within the porous non-woven web; (c) a fluorinated polymer; and (d) inert particles wherein at least some of the carbon fibers of the porous non-woven web have a coating comprising the fluorinated polymer and inert particles is disclosed.Type: GrantFiled: February 4, 2015Date of Patent: September 24, 2019Assignee: Technical Fibre Products LimitedInventors: James Matthew Cash, Michael Jeschke, Victoria Jane Wright, Jonathan David Brereton Sharman
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Publication number: 20180277279Abstract: A graphene containing composition comprises a mixture of multilayered graphene and graphite, which present many desirable properties and have numerous applications in various industries. A process generates said graphene containing composition in water-based cosolvents with relatively gentle mechanical force. A process generates a hydrogen bonded graphene laminate or multilayered hydrogen graphene, which comprises a readily identifiable multilayered graphene component and a graphite component. In the hydrogen graphene laminate (multilayered hydrogen graphene composition), the hydrogen bonding separates the layers and weakens the Van der Waals forces between the graphite sheets sufficiently to produce laminate layers of graphene. Multilayered hydrogen graphene composition also presents many desirable properties and has numerous applications in various industries.Type: ApplicationFiled: November 22, 2017Publication date: September 27, 2018Inventors: David Brereton, Timothy Brereton, Axel Winkelmann
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Patent number: 9876234Abstract: A reinforced catalyst layer assembly, suitably for use in a fuel cell, said reinforced catalyst layer assembly comprising: (i) a planar reinforcing component consisting of a porous material having pores extending through the thickness of the material in the z-direction, and (ii) a first catalyst component comprising a first catalyst material and a first ion-conducting material, characterised in that the first catalyst component is at least partially embedded within the planar reinforcing component, forming a first catalyst layer having a first surface and a second surface is disclosed.Type: GrantFiled: June 15, 2017Date of Patent: January 23, 2018Assignee: Johnson Matthey Fuel Cells LimitedInventor: Jonathan David Brereton Sharman
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Patent number: 9859572Abstract: A non-woven gas diffusion substrate including: (i) a non-woven carbon fiber web; (ii) a carbon particulate material; and 10 (iii) a hydrophobic binder characterized in that the non-woven gas diffusion substrate further includes a conductive material having a x:y aspect ratio from 0.01 to 100, a x:z aspect ratio of at least 500 and a y:z aspect ratio of at least 500.Type: GrantFiled: October 17, 2012Date of Patent: January 2, 2018Assignee: Technical Fibre Products LimitedInventors: Rosemary Fisher, Ian Roy Harkness, Jonathan David Brereton Sharman, Michael Jeschke
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Publication number: 20170288234Abstract: A reinforced catalyst layer assembly, suitably for use in a fuel cell, said reinforced catalyst layer assembly comprising: (i) a planar reinforcing component consisting of a porous material having pores extending through the thickness of the material in the z-direction, and (ii) a first catalyst component comprising a first catalyst material and a first ion-conducting material, characterised in that the first catalyst component is at least partially embedded within the planar reinforcing component, forming a first catalyst layer having a first surface and a second surface is disclosed.Type: ApplicationFiled: June 15, 2017Publication date: October 5, 2017Applicant: Johnson Matthey Fuel Cells LimitedInventor: Jonathan David Brereton Sharman
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Publication number: 20170218529Abstract: A cathode material comprising a titanium sheet and platinum, the platinum being in the form of nanoparticles deposited on at least one side of the titanium sheet, to form a decoration thereon, and processes for the preparation thereof.Type: ApplicationFiled: January 26, 2017Publication date: August 3, 2017Applicant: Johnson Matthey Public Limited CompanyInventors: Jonathan David Brereton SHARMAN, Alistair Henderson KEAN, Daniel OAKES, Edward Anthony WRIGHT
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Patent number: 9722255Abstract: A reinforced catalyst layer assembly, suitably for use in a fuel cell, said reinforced catalyst layer assembly comprising: (i) a planar reinforcing component consisting of a porous material having pores extending through the thickness of the material in the z-direction, and (ii) a first catalyst component comprising a first catalyst material and a first ion-conducting material, characterized in that the first catalyst component is at least partially embedded within the planar reinforcing component, forming a first catalyst layer having a first surface and a second surface is disclosed.Type: GrantFiled: December 15, 2010Date of Patent: August 1, 2017Assignee: Johnson Matthey Fuel Cells LimitedInventor: Jonathan David Brereton Sharman
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Publication number: 20170125821Abstract: A catalyst layer including: (i) a first catalytic material, wherein the first catalytic material facilitates a hydrogen oxidation reaction suitably selected from platinum group metals, gold, silver, base metals or an oxide thereof; and (ii) a second catalytic material, wherein the second catalytic material facilitates an oxygen evolution reaction, wherein the second catalytic material includes iridium or iridium oxide and one or more metals M or an oxide thereof, wherein M is selected from the group consisting of transition metals and Sn, wherein the transition metal is preferably selected from the group IVB, VB and VIB; and the first catalytic material is supported on the second catalytic material. The catalyst can be used in fuel cells, supported on electrodes or polymeric membranes for increasing tolerance to cell voltage reversal.Type: ApplicationFiled: January 18, 2017Publication date: May 4, 2017Inventors: Jonathan David Brereton SHARMAN, Brian Ronald Charles THEOBALD, Edward Anthony WRIGHT
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Publication number: 20170098833Abstract: A catalyst includes (i) a primary metal or alloy or mixture including the primary metal, and (ii) an electrically conductive carbon support material for the primary metal or alloy or mixture including the primary metal, wherein the carbon support material (a) has a specific surface area (BET) of 100-600 m2/g, and (b) has a micropore area of 10-60 m2/g. Methods for producing the carbon support material and methods for decreasing the corrosion rate of the carbon support material are also provided.Type: ApplicationFiled: December 7, 2016Publication date: April 6, 2017Inventors: Sarah Caroline BALL, Graham Alan HARDS, Marlene RODLERT, Jonathan David Brereton SHARMAN, Michael E. SPAHR
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Patent number: 9577269Abstract: A catalytic material includes (i) a support material and (ii) a thin film catalyst coating having an inner face adjacent to the support material and an outer face, the thin film catalyst coating having a mean thickness of ?8 nm, and wherein at least 40% of the support material surface area is covered by the thin film catalyst coating; and wherein the thin film catalyst coating includes a first metal and one or more second metals, and wherein the atomic percentage of first metal in the thin film catalyst coating is not uniform through the thickness of the thin film catalyst coating.Type: GrantFiled: March 28, 2013Date of Patent: February 21, 2017Assignee: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Graham Alan Hards, Ian Roy Harkness, Michael Ian Petch, Jonathan David Brereton Sharman, Edward Anthony Wright, Alexander Martin Willcocks
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Patent number: 9548500Abstract: A catalyst includes (i) a primary metal or alloy or mixture including the primary metal, and (ii) an electrically conductive carbon support material for the primary metal or alloy or mixture including the primary metal, wherein the carbon support material: (a) has a specific surface area (BET) of 100-600 m2/g, and (b) has a micropore area of 10-90 m2/g.Type: GrantFiled: September 19, 2012Date of Patent: January 17, 2017Assignees: JOHNSON MATTHEY FUEL CELLS LIMITED, IMERYS GRAPHITE & CARBON SWITZERLAND LTD.Inventors: Sarah Caroline Ball, Graham Alan Hards, Marlene Rodlert, Jonathan David Brereton Sharman, Michael E Spahr
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Publication number: 20160351919Abstract: A porous gas diffusion substrate comprising: (a) a porous non-woven web comprising carbon fibres; and (b) a carbonaceous residue; wherein the carbonaceous residue is embedded within the porous non-woven web; (c) a fluorinated polymer; and (d) inert particles wherein at least some of the carbon fibres of the porous non-woven web have a coating comprising the fluorinated polymer and inert particles is disclosed.Type: ApplicationFiled: February 4, 2015Publication date: December 1, 2016Inventors: James Matthew CASH, Michael JESCHKE, Victoria Jane WRIGHT, Jonathan David Brereton SHARMAN
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Publication number: 20150228984Abstract: An air-breathing cathode includes (i) a conductive current collector; (ii) a metal-ion conducting medium; and a metal oxide of formula (AA?)a(BB?)bOc. wherein: A and A? are the same or different and selected from RE (which is yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium), magnesium, calcium, strontium, barium, lithium, sodium, potassium, indium, thallium, tin, lead, antimony or bismuth; B is Ru, Ir, Os, Rh, Ti, Sn, Ge, Mn, Ta, Nb, Mo, W, Zr or Pb; B? is absent or selected from Ru, Ir, Os, Rh, Ca, Mg, In, Tl, Sn, Pb, Sb, Bi, Ge, Ta, Nb, Mo, W, Zr or RE; c is from 3-11; the atomic ratio of (a+b):c is from 1:1 to 1:2; the atomic ratio of a:b is from 1: 1.5 to 1.5:1 and at least one A and/or A? is an alkali metal, alkaline earth metal or RE.Type: ApplicationFiled: August 1, 2013Publication date: August 13, 2015Inventors: Sarah Caroline Ball, Robert John Potter, Jonathan David Brereton Sharman
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Publication number: 20150180073Abstract: An ion-conducting membrane includes: (i) a first ion-conducting layer including one or more first ion-conducting polymers; and (ii) a barrier layer including graphene-based platelets.Type: ApplicationFiled: July 10, 2013Publication date: June 25, 2015Inventors: Jonathan Charles Frost, Jonathan David Brereton Sharman, Nadia Michele Permogorov
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Publication number: 20150086902Abstract: A catalytic material includes (i) a support material and (ii) a thin film catalyst coating having an inner face adjacent to the support material and an outer face, the thin film catalyst coating having a mean thickness of ?8 nm, and wherein at least 40% of the support material surface area is covered by the thin film catalyst coating; and wherein the thin film catalyst coating includes a first metal and one or more second metals, and wherein the atomic percentage of first metal in the thin film catalyst coating is not uniform through the thickness of the thin film catalyst coating.Type: ApplicationFiled: March 28, 2013Publication date: March 26, 2015Applicant: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Graham Alan Hards, Ian Roy Harkness, Michael Ian Petch, Jonathan David Brereton Sharman, Edward Anthony Wright, Alexander Martin Willcocks
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Publication number: 20140295316Abstract: A catalyst includes (i) a primary metal or alloy or mixture including the primary metal, and (ii) an electrically conductive carbon support material for the primary metal or alloy or mixture including the primary metal, wherein the carbon support material: (a) has a specific surface area (BET) of 100-600 m2/g, and (b) has a micropore area of 10-90 m2/g.Type: ApplicationFiled: September 19, 2012Publication date: October 2, 2014Inventors: Sarah Caroline Ball, Graham Alan Hards, Marlene Rodlert, Jonathan David Brereton Sharman, Michael E Spahr