Ballard Power Systems Corporation

Johnson Matthey Public Limited Company

National Research Council of Canada

Daimler-benz Ag

The University of British Columbia

Octopus Technologies Inc.

Mangrove Water Technologies Ltd.

Johnson Matthey Hydrogen Technologies Limited

Her Majesty the Queen in Right of Canada, As Represented by the Province

Her Majesty the Queen in Right of the Provence of British Columbia

Bdf IP Holdings Ltd.

David P Wilkinson

Stephen A Campbell

Henry H Voss

Shanna Denine Knights

Jean St-Pierre

Joy A Roberts

Gordon J Lamont

Kevin M Colbow

Mark Christian Johnson

Jiujun Zhang

Michael T Davis

Keith B Prater

Juergen Stumper

Arman Bonakdarpour

Michael V Lauritzen

James T Dudley

John Malcolm Gascoyne

Olen Richard Vanderleeden

Graham Alan Hards

David S Watkins

Nicholas J Fletcher

Marian E Van Der Geest

Vesna Basura

Alfred Lam

Thomas Robertson Ralph

David S Wainwright

Cindy J Longley

Alvin Lee

Clemens Schwab

Jens M&uuml;ller

Joerg Zimmerman

J&uuml;rgen Stumper

Haijiang Wang

Rajeev Vohra

Jared L Taylor

Jonathan C Frost

Ivan Stosevski

Stephanie Moroz

Bien Hung Chiem

Joerg Zimmermann

David Thompsett

Jeffery R Dahn

Eric G Pow

Clarence Y Chow

Peter Robert Gibb

Peter Urban

Robert J Potter

Jonathan Sharman

Erik Paul Johannes

Kirk B Washington

Gustav A Boehm

Mehrzad Tabatabaian

Jun Shen

NengYou Jia

John T Kenna

John Ka Chan

John Robert Gordon

Jacob William De Vaal

Regina Wezel

Lynn C Erickson

Paul Beattie

Kelvin Keen-Ven Fong

Reinhold Schamm

Werner Tillmetz

Ruediger Nebelsiek

Myles L Bos

Derek E Allan, Deceased

George Thomas

Caikang (Elton) Gu

Perry Juric

Louis Greg Afonso

Eagranie Yuh

Charles P Asman

Baizeng Fang

Lius Daniel

Sheilah Neumann

Paul Kozak

Sonia Geillis Wong-Cheung

Ross W J Bailey

Mohammad Saad Dara

Jason Edward Chisham

Jason Kwan

By Patricia Allan, Administrator

Michael Todd Davis

Bien Chiem

Paul D Beattie

Methods of preparing catalyst materials are provided. The catalyst material comprise electrocatalyst particles, a support material, and graphitic carbon nitride. The methods comprise applying graphitic carbon nitride to a catalyst material precursor.

Methods of preparing catalyst materials

The present application relates to a method comprising: (a) providing a battery comprising a manganese oxide composition as a primary active material; and (b) cycling the battery by: (i) galvanostatically discharging the battery to a first V; (ii) galvanostatically charging the battery to a second V; and (iii) potentiostatically charging at the second Vfor a first defined period of time. The present application also relates to a chemical composition produced by the method above. The present application also relates to a battery comprising one or more chemical species, the one or more chemical species produced by cycling an activated composition.

Manganese oxide composition and method for preparing manganese oxide composition

A method of exposing a sample to an electrical effect for electrochemical analysis of the sample in an electrolyte solution is disclosed. The method comprises causing an external electrical conductor of an electrode head to apply the electrical effect, the external electrical conductor of the electrode head being external to the electrode head and on an external side of the sample exposed to the electrolyte solution. Apparatuses are also disclosed.

Methods and apparatuses for electrochemical analysis of a sample

A method and system for reducing ion concentration of a solution and converting gas. The system comprising a multi-chamber unitary dialysis cell comprising a gas chamber, a product chamber, and an acid chamber. Ion exchange barriers separate the chambers of the dialysis cell. A first anion exchange barrier is positioned between the product chamber and the acid chamber and a first cation exchange barrier is positioned between the product chamber and the gas chamber. Anions from the solution being treated associate with cations from the acid chamber to form an acid solution in the acid chamber, and cations from the solution being treated associate with anions from the fluid comprising gas to form salt, thereby reducing the ion concentration of the solution being treated and converting at least a portion of the gas into salt.

Conversion of gas and treatment of a solution

The present application relates to a method comprising: (a) providing a battery comprising a manganese oxide composition as a primary active material; and (b) cycling the battery by: (i) galvanostatically discharging the battery to a first V; (ii) galvanostatically charging the battery to a second V; and (iii) potentiostatically charging at the second Vfor a first defined period of time. The present application also relates to a chemical composition produced by the method above. The present application also relates to a battery comprising a chemical composition having an X-ray diffractogram pattern expressing a Bragg peak at about 26&#xb0;, said peak being of greatest intensity in comparison to other expressed Bragg peaks. The present application also relates to a battery comprising one or more chemical species, the one or more chemical species produced by cycling an activated composition.

A fuel cell comprises an anode having an inner face and an outer face fluidly communicable with a fuel; a cathode having an inner face ionically communicable with and physically separated from the anode inner face, and having an outer face fluidly communicable with an oxidant; and at least one movable guard movable over at least one of the anode outer face, cathode outer face, anode inner face, and cathode inner face. The guard has a structure sufficient to block at least part of one or more of the anode's communication with the fuel, the cathode's communication with the oxidant, and the ionic communication between the anode and cathode thereby reducing a maximum potential active area of the fuel cell to an effective active area of the fuel cell.

Apparatus and method for controlling variable power conditions in a fuel cell

The invention described relates to an apparatus and method for measuring the concentration of a low molecular weight alcohol, in an aqueous liquid feed solution, comprising a first sensor including a hydrophilic capillary tube having an inner diameter, being disposed between two electrodes to form a first capacitor, a second sensor including a hydrophobic capillary tube having the same inner diameter as a capillary tube of the first sensor; said hydrophobic capillary tube having a hydrophobic coating on the inner diameter, being disposed between two electrodes to form a second capacitor, wherein the first hydrophilic and second hydrophobic sensors are dipped to the same depth in the aqueous solution to measure the solution concentration, means for measuring the capacitance of the two capacitors, and control means including a control circuit driven by a computer, wherein the difference in capacitance between the two capacitors is a measure of the concentration of the solution, independent of the depth of dipping of the two capacitors in the aqueous solution. In another embodiment, a single hydrophilic sensor is employed.

Sensor for measuring the concentration of a solvent or solute in a mixed solution system

A direct fuel cell comprises a cathode comprising electroactive catalyst material; and an anode assembly comprising an anode having a porous layer and electroactive catalyst material in the porous layer. The electrode characteristics of the anode assembly are selected so that fuel supplied to the anode is reacted within the anode so that cross-over from the anode to the cathode does not have more than a 10% negative effect on voltage or a 25 mV voltage loss when at peak power and steady state conditions. The anode and cathode each have a first major surface facing each other in non-electrical contact and without a microporous separator or ion exchange membrane therebetween.

Membraneless fuel cell and method of operating same

An electrochemical fuel cell stack comprises a plurality of fuel cell assemblies, wherein, each fuel cell assembly comprises a cell compressed between a pair of flow field plates, a perimeter seal circumscribing the cell and interposed between the pair of flow field plates, and a first diode, having an aspect ratio greater than 10:1, positioned adjacent to, and outside of, the perimeter seal along a first edge of the cell and interposed between the pair of flow field plates.

Electrochemical fuel cell stack having a plurality of integrated voltage reversal protection diodes

A solid polymer electrolyte fuel cell stack having a plurality of fuel cells, wherein at least one cell of the fuel cell stack has a resistance to corrosion that is greater than a significant portion of the other fuel cells of the stack. In one embodiment, the at least one fuel cell of the fuel cell stack that is more resistant to corrosion is one or both end cells of the stack. Also disclosed is a fuel cell system containing such a stack, as well as methods for reducing degradation of the same during operation.

Solid polymer electrolyte fuel cell stack having specific corrosion resistant cells

A fuel cell fluid distribution layer, in one embodiment, comprises perforated graphite foil. The fluid distribution layer can have one or more reactant flow field channels formed in one or both major surfaces, one or more manifold openings, conductive filler on one or both major surfaces, conductive filler at least partially filling some or all perforations and/or an electrocatalyst one or both major surfaces.

Fuel cell fluid distribution layer having integral sealing capability

In a solid polymer fuel cell series, various circumstances can result in the fuel cell being driven into voltage reversal. For instance, cell voltage reversal can occur if that cell receives an inadequate supply of fuel (for example, fuel starvation). In order to pass current during fuel starvation, reactions other than fuel oxidation may take place at the fuel cell anode, including water electrolysis and oxidation of anode components. The latter may result in significant degradation of the anode. Such fuel cells can be made more tolerant to cell reversal by promoting water electrolysis over anode component oxidation at the anode. This can be accomplished by incorporating a catalyst composition at the anode to promote the water electrolysis reaction, in addition to the typical anode electrocatalyst for promoting fuel oxidation.

Solid polymer fuel cell with improved voltage reversal tolerance

In an improved electrochemical fuel cell assembly, a reactant flow path extends substantially linearly across the electrochemically active area of an electrode. The electrode has an in-plane nonuniform structure in its electrochemically active area as the active area is traversed in the direction of the substantially linear reactant flow path. Embodiments in which the structure of the fuel cell electrode varies substantially symmetrically along the reactant flow path are particularly preferred in fuel cells in which the flow direction of a reactant is periodically reversed.

Electrochemical fuel cell with an electrode having an in-plane nonuniform structure

The activity of catalysts used in promoting the oxidation of certain oxidizable species in fluids can be enhanced via electrochemical methods, e.g., NEMCA. In particular, the activity of catalysts used in the selective oxidation of carbon monoxide can be enhanced. A purification system that exploits this effect is useful in purifying reformate supplied as fuel to a solid polymer electrolyte fuel cell stack. The purification system comprises an electrolytic cell with fluid diffusion electrodes. The activity of catalyst incorporated in the cell anode is enhanced.

Method and device for improved catalytic activity in the purification of fluids

The electrochemical performance of an ion-exchange membrane in a fuel cell system may be improved by impregnating therein a perfluoroamine. The amine may be primary, secondary or tertiary. Further, the amine is preferably water insoluble or only slightly water soluble. For example, the amine may be perfluorotriamylamine or perfluorotributylamine. Use of such a membrane system within a fuel cell may allow high or low temperature operation (i.e. at temperatures greater than 100&#xb0; C. or less than 0&#xb0; C.) as well as operation at low relative humidity.

Impregnation of ion-exchange membranes to improve electrochemical fuel cell performance

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Vancouver, Canada

David P Wilkinson