Abstract: An electrolyte composition includes ethyl acetate and one or more lithium salts. The ethyl acetate is present in the electrolyte composition in an amount of at least 50 volume % based on the total volume of the electrolyte composition.

Abstract: An electrode composition is disclosed that includes a silicon alloy containing silicon, iron and optionally carbon. The silicon alloy is capable of undergoing lithiation and delithiation. The electrode composition also includes graphitic carbon, a binder, and a conductive additive containing carbon nanotubes. Such an electrode composition may be used in a negative electrode for an electrochemical cell that also contains a positive electrode and an electrolyte. Also disclosed are batteries containing such electrochemical cells and methods of making electrochemical cells using the electrode composition.

Abstract: Provided is an electrode composition comprising an active material that includes cobalt, tin, and carbon along with methods of making and using the same. Also provided are electrodes that include the provided electrode compositions, electrochemical cells that include the provided electrodes, and battery packs that include at least one of the provided electrochemical cells. In some embodiments, the composition also includes iron.

Abstract: An electrode composition for a lithium ion battery having the formula SixSnqMyCz where q, x, y, and z represent atomic percent values and (a) (q+x)>2y+z; (b) q?0, (c) z?0; and (d) M is one or more metals selected from manganese, molybdenum, niobium, tungsten, tantalum, iron, copper, titanium, vanadium, chromium, nickel, cobalt, zirconium, yttrium, or a combination thereof. The Si, Sn, M, and C elements are arranged in the form of a multi-phase microstructure comprising: (a) an amorphous phase comprising silicon; (b) a nanocrystalline phase comprising a metal silicide; and (c) a phase comprising silicon carbide phase when z>0; and (d) an amorphous phase comprising Sn when q>0.

Abstract: An electrode composition for a lithium ion battery having the formula SixSnqMyCz where q, x, y, and z represent atomic percent values and (a) (q+x)>2y+z; (b) q?0, (c) z?0; and (d) M is one or more metals selected from manganese, molybdenum, niobium, tungsten, tantalum, iron, copper, titanium, vanadium, chromium, nickel, cobalt, zirconium, yttrium, or a combination thereof. The Si, Sn, M, and C elements are arranged in the form of a multi-phase microstructure comprising: (a) an amorphous phase comprising silicon; (b) a nanocrystalline phase comprising a metal silicide; and (c) a phase comprising silicon carbide phase when z>0; and (d) an amorphous phase comprising Sn when q>0.

Abstract: Provided is an electrode composition comprising a powdered material capable of undergoing lithiation and delithiation, and a non-elastomeric binder comprising lithium polyacrylate, along with methods of making and using the same, as well as electrochemical cells incorporating the same.

Abstract: An electrode composition for a lithium ion battery having the formula SixSnqMyCz where q, x, y, and z represent atomic percent values and (a) (q+x)>2y+z; (b) q?0, (c) z?0; and (d) M is one or more metals selected from manganese, molybdenum, niobium, tungsten, tantalum, iron, copper, titanium, vanadium, chromium, nickel, cobalt, zirconium, yttrium, or a combination thereof. The Si, Sn, M, and C elements are arranged in the form of a multi-phase microstructure comprising: (a) an amorphous phase comprising silicon; (b) a nanocrystalline phase comprising a metal silicide; and (c) a phase comprising silicon carbide phase when z>0; and (d) an amorphous phase comprising Sn when q>0.

Abstract: Provided is an electrode composition comprising a powdered material capable of undergoing lithiation and delithiation, and a non-elastomeric binder comprising lithium polyacrylate, along with methods of making and using the same, as well as electrochemical cells incorporating the same.

Abstract: Provided is an electrode composition comprising an active material that includes cobalt, tin, and carbon along with methods of making and using the same. Also provided are electrodes that include the provided electrode compositions, electrochemical cells that include the provided electrodes, and battery packs that include at least one of the provided electrochemical cells. In some embodiments, the composition also includes iron.

Abstract: Provided is an electrode composition comprising a powdered material capable of undergoing lithiation and delithiation, and a non-elastomeric binder comprising lithium polyacrylate, along with methods of making and using the same, as well as electrochemical cells incorporating the same.

Abstract: A cathode composition consists essentially of (a) at least one non-fully delithiatable cathode active material; and (b) at least one electrochemically inactive metal oxide; the cathode active material and the metal oxide being present only as separate phases that have essentially no chemical bonding between them.

Abstract: An electrode composition for a lithium ion battery having the formula SixSnqMyCz where q, x, y, and z represent atomic percent values and (a) (q+x)>2y+z; (b) q?0, (c) z?0; and (d) M is one or more metals selected from manganese, molybdenum, niobium, tungsten, tantalum, iron, copper, titanium, vanadium, chromium, nickel, cobalt, zirconium, yttrium, or a combination thereof. The Si, Sn, M, and C elements are arranged in the form of a multi-phase microstructure comprising: (a) an amorphous phase comprising silicon; (b) a nanocrystalline phase comprising a metal silicide; and (c) a phase comprising silicon carbide phase when z>0; and (d) an amorphous phase comprising Sn when q>0.

Abstract: A cathode composition consists essentially of (a) at least one non-fully delithiatable cathode active material; and (b) at least one electrochemically inactive metal oxide; the cathode active material and the metal oxide being present only as separate phases that have essentially no chemical bonding between them.

Abstract: Electrolyte compositions for use in cells and batteries that include a crosslinked solid ionically conductive polymer having urethane groups, urea groups, thiocarbamate groups, or combinations thereof, particles, and a salt. Certain electrolyte compositions include a liquid thereby forming a gel electrolyte composition.

Abstract: Electrolyte compositions for use in cells and batteries that include a crosslinked solid ionically conductive polymer having urethane groups, urea groups, thiocarbamate groups, or combinations thereof, particles, and a salt. Certain electrolyte compositions include a liquid thereby forming a gel electrolyte composition.

Abstract: An electrolyte composition is featured that includes a solid, ionically conductive polymer, organically modified oxide particles that include organic groups covalently bonded to the oxide particles, and an alkali metal salt. The electrolyte composition is free of lithiated zeolite. The invention also features cells that incorporate the electrolyte composition.

Abstract: Nominal composition V.sub.2 O.sub.4.5 (OH) materials suitable for intercalations of greater than 2.4 Li per V.sub.2 O.sub.5 to yield theoretical energy density of greater than 970 Wh/Kg of cathode active material, the intercalation being completely reversible and synthesis of the materials from sol and gels, and devices incorporating these materials.

Abstract: Nominal composition V.sub.2 O.sub.4.5 (OH) materials suitable for intercalations of greater than 2.4 Li per V.sub.2 O.sub.5 to yield theoretical energy density of greater than 970 Wh/Kg of cathode active material, the intercalation being completely reversible and synthesis of the materials from sol and gels, and devices incorporating these materials.