US Government As Represented by the Secretary of the Army

Charles W Walker, Jr

Michael Binder

William L Wade, Jr

Sol Gilman

Eric R Petersen

Edward J Plichta

Wishvender K Behl

Robert J Mammone

Deryn D Chu

Rongzhong Jiang

Steven M Slane

Judy Walker, Legal Representative

A metal-air battery has an anode in which the electrochemically active material is molybdenum. The molybdenum may be in the form of a bulk body of material or it may comprise a particulate material dispersed with or in another material. In some instances, the molybdenum may comprise a member of an alloy or mixture. Also disclosed is a modular battery system which may include the molybdenum-based anode material.

Molybdenum/air battery and cell design

A water insoluble interpenetrating polymer network is obtained by independently cross-linking a first polymer derived from a sulfonic acid or phosphonic acid group containing alkenyl monomer and a second polymer polymerized independently of the first polymer and interpenetrating the first polymer, where the second polymer is selectively permeable to water compared to methanol. Through adjustment of the degree of first polymer monomer acidification, polymer ratios and the extent of cross-linking in the at least two interpenetrating polymers, ion conductivity and solvent permeability are controlled. A film produced from such a water insoluble interpenetrating polymer network is well suited as a membrane in a direct methanol fuel cell. The relative degree and mechanism of cross-linking and interpenetrating the first polymer and second polymer are also adjustable parameters that impact on film properties.

Interpenetrating polymer network

A solid polymer electrolyte having an increased conductivity is provided luding a solution of at least one lithium salt in at least one polymer host, and wherein said solid polymer electrolyte also includes a dispersion of a lithium ion conducting solid ceramic material. A solid state electrochemical cell including the electrolyte is also provided.

Solid polymer electrolyte having an increased conductivity and solid

A lithium electrochemical cell is provided that provides many cycles with loss in capacity. The cell contains an ion conducting solid polymer electrolyte and an electronically conductive, anion-intercalating polymer cathode.

Solid state electrochemical lithium/polymer cell

A high voltage, rechargeable lithium electrochemical cell is provided that exhibits high cycling efficiency over many cycles. The cell comprises metallic lithium as the anode, poly 3-methylthiophene (PMT) polymer as the cathode, and LiAsF.sub.6 salt dissolved in dimethylcarbonate (DMC) as the electrolyte.

High voltage lithium rechargeable electrochemical cell

An electrochemical cell is provided that delivers high power pulses, the l including poly 3-methylthiophene as the cathode, a member of the group consisting of Li(SO.sub.2).sub.3 AlCl.sub.4, 1.0M LiAlCl.sub.4 --SOCl.sub.2 and 1.0M LiAlCl.sub.4 --SO.sub.2 Cl.sub.2 as the electrolyte, and lithium as the anode.

Electrochemical cell that delivers high power pulses

A miniature electrochemically active porous material cathode for electrocical studies is made from a conductive rod that is sheathed in electrical insulation except for the cross sectional area at one end of the rod by coating said cross sectional area with a thin layer of conductive epoxy and, prior to curing, pressing the conductive epoxy in contact with electrochemically active porous cathode material.

Miniature porous electrode and method of making

A method of indicating the state of charge of a battery is provided wherein a LED clock electrically connected to the battery operates each time current passes through the battery and stops when there is no battery current; the clock retaining the amount of time already passed so that resumed battery operation again activates the clock to continue counting.

Method of indicating the state of change of a battery using a light

An alkaline earth-oxyhalide electrochemical cell is improved in its low teratures operation by including bromine in the electrolyte of the cell.

Alkaline earth-oxyhalide electrochemical cell for low temperature use

Solid materials are easily washed with liquified gas by placing the solid terial to be washed in a dry vessel under an inert atmosphere, evacuating the vessel, introducing the low temperature liquified gas solvent into the vessel, allowing the washing of the solid by the liquified gas solvent, and removing the solvent by the application of vacuum.

Method of washing solids with liquified gases

A cathode is provided for use in high energy primary lithium-thionyl chloe cell systems or calcium-thionyl chloride cell systems. The cathode comprises an expanded metallic current collector screen into which has been pasted a mixture of a low surface area conductive carbon black and a high surface area conductive carbon black previously mixed with a binder.

Cathode for use in high energy primary thionyl chloride cell systems and

A high capacity lithium inorganic oxyhalide electrochemical cell is provi including lithium as the anode, carbon as the cathode, and a solution of a quaternary ammonium salt in an inorganic oxyhalide solvent as the electrolyte.

High capacity inorganic oxyhalide electrochemical cell

Carbon black powder is pretreated with acetone or methanol prior to cathode abrication to improve the cathode operating voltage and increase the cathode life of lithium sulfuryl chloride electrochemical cells.

Method of pretreating carbon black powder to improve cathode performance

A porous carbon cathode for use in an electrochemical cell is made by wetg the carbon black with a 1:1 to 1:3 mixture of isopropyl alcohol:water, adding a binding agent thereto, smearing the resulting stiff paste on a thin expanded metal screen and pressing and rolling to the desired thickness, drying the cathode sheet in a vacuum oven at about 100.degree. C. for one hour while a weight is placed above and below the cathode sheet which is sandwiched between two pieces of blotting paper, the total weight applied being sufficient for the cathode to retain structural integrity, removing the weight and blotting papers and inserting the cathode sheet in an elevated drying oven at about 280.degree. C. for about one hour, and cooling the cathode sheet between blotting paper, repressing and rolling. Cathodes prepared by this method appear structurally strong, maintain their physical integrity with a minimum of cracking and flaking, and do not crumble when cut. The porous carbon cathode is particularly advantageous when included in a lithium sulfuryl chloride cell, but can be used in any system requiring porous carbon cathodes.

Growing community of inventors

Freehold, NJ, United States of America

Charles W Walker, Jr