Lockheed Martin Advanced Energy Storage, LLC

Utc Fuel Cells, LLC

Utc Power Corporation

Lockheed Martin Energy, LLC

Audi Ag

United Technologies Corporation

Harvard College

Ballard Power Systems Corporation

Sun Catalytix Corporation

Thomas D Jarvi

Steven Y Reece

John Goeltz

Arthur J Esswein

Desiree Amadeo

Evan R King

Nitin Tyagi

Ned Emidio Cipollini

Michael L Perry

James A Leistra

Jared B Hertzberg

David A Condit

Thomas Harry Madden

Tommy Skiba

Ryan J Balliet

Robert Mason Darling

Craig E Evans

Sergei F Burlatsky

Evan Christopher Rege

Timothy W Patterson

Jeremy P Meyers

Sathya Motupally

Chi-Hum Paik

Wayde R Schmidt

Richard D Breault

Carl Anthony Reiser

Sitaram Ramaswamy

Sonia Tulyani

Hiroshi Chizawa

John A S Bett

Chi H Paik

Ping Yu

Tsutomu Aoki

Lars M Pedersen

This invention is directed to aqueous redox flow batteries comprising redox-active metal ligand coordination compounds. The compounds and configurations described herein enable flow batteries with performance and cost parameters that represent a significant improvement over that previous known in the art.

Aqueous redox flow batteries comprising metal ligand coordination compounds

This invention is directed to aqueous redox flow batteries comprising ionically charged redox active materials and separators, wherein the separator is about 100 microns or less and the flow battery is capable of (a) operating with a current efficiency of at least 85% with a current density of at least about 100 mA/cm; (b) operating with a round trip voltage efficiency of at least 60% with a current density of at least about 100 mA/cm; and/or (c) giving rise to diffusion rates through the separator for the first active material, the second active material, or both, of about 1&#xd7;10mol/cm-sec or less.

Electrochemical energy storage systems and methods featuring optimal membrane systems

The invention concerns flow batteries comprising: a first half-cell comprising: (i) a first aqueous electrolyte comprising a first redox active material; and a first carbon electrode in contact with the first aqueous electrolyte; (ii) a second half-cell comprising: a second aqueous electrolyte comprising a second redox active material; and a second carbon electrode in contact with the second aqueous electrolyte; and (iii) a separator disposed between the first half-cell and the second half-cell; the first half-cell having a half-cell potential equal to or more negative than about &#x2212;0.3 V with respect to a reversible hydrogen electrode; and the first aqueous electrolyte having a pH in a range of from about 8 to about 13, wherein the flow battery is capable of operating or is operating at a current density at least about 25 mA/cm.

Electrochemical energy storage systems and methods featuring large negative half-cell potentials

The invention concerns flow batteries comprising: a first aqueous electrolyte comprising a first redox active material; a second aqueous electrolyte comprising a second redox active material; a first electrode in contact with the first aqueous electrolyte; a second electrode in contact with the second aqueous electrolyte and a separator disposed between the first aqueous electrolyte and the second aqueous electrolyte; the flow battery having an open circuit potential of at least 1.4 V, and is capable of operating or is operating at a current density at least about 50 mA/cm, wherein both of the first and second redox active materials remain soluble in both the charged and discharged states. In certain embodiments, the redox active materials are metal ligand coordination compounds. The disclosure also describes systems comprising these flow batteries and methods of them.

Electrochemical energy storage systems and methods featuring high open circuit potential

This invention is directed to aqueous redox flow batteries comprising ionically charged redox active materials and ionomer membranes, wherein the charge of the redox active materials is of the same sign as that of the ionomer, so as to confer specific improvements.

Aqueous redox flow batteries comprising matched ionomer membranes

A membrane electrode assembly includes an anode including a hydrogen oxidation catalyst; a cathode; a membrane disposed between the anode and the cathode; and a peroxide decomposition catalyst positioned in at least one position selected from the group consisting of a layer between the anode and the membrane and a layer between the cathode and the membrane wherein the peroxide decomposition catalyst has selectivity when exposed to hydrogen peroxide toward reactions which form benign products from the hydrogen peroxide. The peroxide decomposition catalyst can also be positioned within the membrane. Also disclosed is a power-generating fuel cell system including such a membrane electrode assembly, and a process for operating such a fuel cell system. The assembly components contain ionomer material which can be perfluorinated or non-perfluorinated, high temperature, hydrocarbon, and the like.

Membrane electrode assemblies with hydrogen peroxide decomposition catalyst

The present invention generally relates to nanostructures and compositions comprising nanostructures, methods of making and using the nanostructures, and related systems. In some embodiments, a nanostructure comprises a first region and a second region, wherein a first photocatalytic reaction (e.g., an oxidation reaction) can be carried out at the first region and a second photocatalytic reaction (e.g., a reduction reaction) can be carried out at the second region. In some cases, the first photocatalytic reaction is the formation of oxygen gas from water and the second photocatalytic reaction is the formation of hydrogen gas from water. In some embodiments, a nanostructure comprises at least one semiconductor material, and, in some cases, at least one catalytic material and/or at least one photosensitizing agent.

Nanostructures, systems, and methods for photocatalysis

A unitized electrode assembly () for use in the fuel cell comprises a first GDL (), a PEM (), and a second GDL (), with electrode catalysts () disposed between said PEM and each of said GDLs, said layers () being impregnated with a thermoplastic polymer a sufficient distance from each edge of the UEA so as to form a fluid seal (). The UEA is formed by a process which comprises making a sandwich of some or all of said layers (and), with thermoplastic polymer film () extending inwardly from the edges of said sandwich a sufficient distance to form the seal, said thermoplastic polymer film being disposed between each electrode and the adjacent GDL and/or between each GDL and release film () on the top and bottom of the sandwich. The sandwich, compressed by force between a holding fixture () and an anvil (), is heated by ultrasonic vibration so as to cause said thermoplastic polymer to melt and impregnate the layers () of the UEA with the film (and/orand/or).

Method of preparing a fuel cell unitized electrode assembly by ultrasonic welding

This invention is directed to aqueous redox flow batteries comprising ionically charged redox active materials and separators, wherein the separator is less than about 100 microns and the flow battery is capable of operating with high energy densities and voltage efficiencies.

Aqueous redox flow batteries featuring improved cell design characteristics

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Manchester, CT, United States of America

Thomas D Jarvi