US Government As Represented by the Secretary of the Army

William L Wade, Jr

Michael Binder

Robert J Mammone

Charles W Walker, Jr

Sol Gilman

Eric R Petersen

A porous carbon black or manganese dioxide cathode, or a lithium, magnesi calcium, zinc, or cadmium anode, is treated under vacuum with a gas plasma. The treated electrode is suitable for inclusion in a nonaqueous electrolyte cell and improves cell performance.

Gas plasma treatment of cathodes to improve cell performance

A porous carbon black cathode is treated by brief exposure to a low press, room temperature gas plasma. The treated cathode is suitable for inclusion in a lithium based, nonaqueous electrolyte cell.

Treated porous carbon black cathode and lithium based, nonaqueous

A method is provided of increasing the dielectric breakdown strength of tmoplastic films such as thin films of polypropylene obtained from polypropylene resin powder. The method involves melt extruding the resin powder with a small amount of ceresine wax.

Method of increasing dielectric break-down strengths of thermoplastic

The surface of commercially available polymer films are treated with a low emperature gas plasma to improve the subsequent bonding of aluminum to the polymer surface without the need for adhesives.

Method of treating the surface of commercially available polymer films

Freestanding, flexible, heterogeneous composites of insulating polymeric m containing relatively small percentages of an electrically conductive polymer wherein the conductive polymer exists as the dispersed phase are made by dissolving the insulating polymeric material and less than 15 percent by weight of the electrically conductive material in a solvent, casting the resulting solution onto a suitable substrate and slowly evaporating the solution at an elevated temperature.

Heterogeneous composite and method of making

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

Neptune, NJ, United States of America

William L Wade, Jr