Disclosed is a cathode material for a metal-oxygen battery such as a lithium-oxygen battery. The material comprises, on a weight basis, a first component which is an oxide or a sulfide of a metal. The first component is capable of intercalating lithium, and is present in an amount which is greater than 20% and up to 80% of the material. The material includes a second component which comprises carbon. The carbon is an electroactive catalyst which is capable of reducing oxygen, and comprises 10–80% of the material. The material further includes a binder, such as a fluoropolymer binder, which is present in an amount of 5–40%. Also disclosed is a battery which incorporates the cathode material.
Electrolyte For Metal-Oxygen Battery And Method For Its Preparation
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
H01M 4/00
US Classification:
429 29, 429188, 429324, 429326, 429322, 42923195
Abstract:
An electrolyte for a metal-oxygen battery includes a non-aqueous solvent which is characterized in that the solubility of oxygen therein is at least 0. 1150 cc O/cc of solvent at STP. The electrolyte also includes an electrolyte salt dissolved in the solvent. The solvent may comprise a mixture of materials in which at least 50%, on a weight basis, of the materials have an oxygen solubility of at least 0. 1760 cc O/cc at STP. Also disclosed is a method for optimizing the composition of an electrolyte for a metal-oxygen battery by selecting the solvent for the electrolyte from those materials which will dissolve the electrolyte salt and which have a solubility for oxygen which is at least 0. 1150 cc O/cc at STP.
Mechanochemical Synthesis Of Carbon Fluorides And An Electrochemical Cell Using The Synthesized Carbon Fluorides
Wishvender K. Behl - Olney MD, US Jeffrey A. Read - West Friendship MD, US
Assignee:
U.S. Government as represented by the Secretary of the Army - Adelphi MD
International Classification:
C01B 31/00
US Classification:
423439
Abstract:
Carbon fluoride is synthesized by reactively or high intensity/energy milling at ambient room temperature carbon-containing material (such as graphite, carbon black, coke, or other carbon-based material) with an inorganic fluoride agent (such as cobalt trifluoride) other than fluorine gas. The following chemical reaction occurs: xC+CoF→CF+CoF, wherein x equals 1 to 4. The CF is separated from the CoFand the CoFby digesting the CF, CoFand the CoFin hot water of at least approximately 90 C. causing the CoFto dissolve; and then filtering the CoF. The CoFis unreacted and undergoes hydrolysis in the hot water to form Co(OH)or CoO.3HO, which is removed by washing with sulfuric acid. Alternatively, the CF is separated from the CoFand the CoFby digesting the CF, CoFand the CoFin heated sulfuric acid followed by filtration and washing with sulfuric acid and then with hot water. The synthesized carbon fluoride is used to form a cathode in electrochemical cells, such as lithium batteries.
Non-Aqueous Electrolyte Solutions And Lithium/Oxygen Batteries Using The Same
A lithium/oxygen battery includes a lithium anode, an air cathode, and a non-aqueous electrolyte soaked in a microporous separator membrane, wherein non-aqueous electrolyte comprises a lithium salt with a general molecular formula of LiBFX (X═F, Cl, or Br, respectively) and a non-aqueous solvent mixture.
Dual-Layer Structured Cathod And Electrochemical Cell
The present invention relates to dual-layered structured sulfur cathodes comprising (a) an electroactive layer and (b) a non-electroactive conductive layer, wherein the non-electroactive conductive layer adsorbs soluble polysulfides and provides reaction sites for the reduction of polysulfides. The present invention also relates to method of making dual-layered structured sulfur cathodes and electrochemical cells.
Electrode For Rechargeable Lithium-Ion Battery And Method Of Fabrication
Donald L. Foster - Laurel MD Jeffrey Wolfenstine - Silver Spring MD Jeffrey Read - West Friendship MD Wishvender K. Behl - Ocean NJ
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
H01M 458
US Classification:
4292181
Abstract:
An electrode for a rechargeable lithium-ion battery is formed by mixing stanous oxide (SnO) and lithium nitride (Li. sub. 3 N) in a stoichiometric ratio of 2 moles of Li. sub. 3 N to 3 moles of SnO to form a mixture, milling the mixture to obtain a milled powder, and processing the milled powder in accordance with an electrode-forming technique. The electrode forming technique can be any one of die pressing, spraying, doctor-blading and rolling. Conductive additives, such as carbon and binders (PVDF, cellulose and Teflon), can be introduced during the processing step. Preferably, the method is carried out in a dry, inert atmosphere of argon or helium. As a result of the invention, a smaller, lighter and more efficient lithium-ion battery is produced.
Dual-Layer Sturctured Cathode And Electrochemical Cell
- ADELPHI MD, US Jeffrey A. Read - West Friendship MD, US
International Classification:
H01M 4/58 H01M 4/36 H01M 4/62 H01M 10/052
Abstract:
The present invention relates to dual-layered structured sulfur cathodes comprising (a) an electroactive layer and (b) a non-electroactive conductive layer, wherein the non-electroactive conductive layer adsorbs soluble polysulfides and provides reaction sites for the reduction of polysulfides. The present invention also relates to method of making dual-layered structured sulfur cathodes and electrochemical cells.
Alex Hoffman, Thomas Schnabel, Hope Knoepfle, Chris Mehlhaff, Travis Allbee, Rachel Hilgemann, Andrew Hilgemann, Kristina Robertson, Hope Boschee, Amy Johnson