W. R. Grace Co.-conn.

Valence Technology, Inc.

W. R. Grace Co.

Other

Joseph T Lundquist

Benjamin M Chaloner-Gill

Marc E Parham

Anthony J Laccetti

Victor S Chang

RIchard C Hartwig

Christian B Lundsager

Milton N Golovin

Robert P Kreh

Mark Joseph Isaacson

Nigel I Palmer

Menahem Anderman

James K Kung

Howard J Troffkin

Ralph J Brodd

Wayne L Henry

James A Avtges

Dale R Shackle

John A Kelly

Felek Jachimowicz

On Kok Chang

Richard T Giovannoni

Vincent R Kuhn

Neal Golovin

James W Buckley

William Masuda

Eric D Kragness

Geneva Ambrose-Ritchey

A method for removing HF from a solid electrolyte using alumina is disclosed. The solid electrolyte contains a polymeric matrix, a salt, a solvent, and a toughening agent. The toughening agent may include alumina, silica, zeolite, and metal oxides (e.g., calcium oxide and magnesium oxide), and mixtures thereof. The toughening agent acts as a drying agent to remove excess solvent in the electrolyte. The solid electrolytes have improved mechanical strength and adherence to the anode and cathode.

Method for removing acidic impurities in a solid electrolyte

A solid electrolyte containing a polymeric matrix, a salt, a solvent, and a toughening agent, is provided. The toughening agent may include alumina, silica, zeolite, and metal oxides (e.g., calcium oxide and magnesium oxide), and mixtures thereof. The toughening agent acts as a drying agent to remove excess solvent in the electrolyte. The solid electrolyte have improved mechanical strength and adherence to the anode and cathode.

Solid electrolytes containing toughening agents and electrolytic cells

A method of making a composition having lithium, transition metal and oxygen elements and preferably having vanadium as the transition metal with a unit structure of the nominal general formula LiV.sub.3 O.sub.8, such structure being able to accept lithium ions. The method as exemplified by the formation of Li.sub.1+x V.sub.3 O.sub.8 (0.ltoreq.x.ltoreq.0.2) comprises forming a mixture of intermingled particles of vanadium pentoxide (V.sub.2 O.sub.5) and lithium carbonate (Li.sub.2 CO.sub.3) each in an amount sufficient to provide a stoichiometric ratio of approximately 1:3 of lithium to vanadium respectively; compacting the particles by applying a compressive force to the intermingled particles; and heating the intermingled particles to an elevated temperature which is below the melting point of the LiV.sub.3 O.sub.8 product of the invention. The compacting and heating steps consolidate the particles into a densified body and cause diffusion of at least a portion of the elements across particle boundaries with release of carbon dioxide, thereby providing a lithium-vanadium-oxygen composition having a unit structure of Li.sub.1+x V.sub.3 O.sub.8.

Method of making lithium metal oxide cathode active material

Disclosed are methods for extending the cycle life of solid, secondary electrolytic cells employing a solid electrolyte which methods comprise (a) charging the discharged electrolytic cell at a rate of from at least about 0.1 to about 0.5 milliamp per square centimeter; (b) interrupting charging step (a) and conducting a high magnitude discharge pulse in said cell of from about 10 seconds to 2 minutes in duration; and (c) reestablishing the charging rate of step (a) and maintaining this rate until the potential of the electrolytic cell increases by at least 0.5 volts.

Methods for extending the cycle life of solid, secondary electrolytic

Disclosed are methods for extending the cycle life of solid, secondary electrolytic cells employing a solid electrolyte having at least about 100 ppm water which methods involve an initial, substantially constant, high rate discharge of the fabricated, charged electrolytic cell.

A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a halogenated polyolefin polymer and a filler or a halogenated polyolefin polymer and surfactant/filler agent, said sheet product having a fibrous sheet embedded within said mixture and between the first and second major surfaces. The porosity of the sheet product is at least about 50 volume percent composed of pores such that the average pore diameter increases from each major surface towards the interior of the sheet product's thickness.

Battery separator

A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a polysulfone polymer and a filler or polysulfone polymer and structure enhancing agent, said sheet product having a fibrous sheet embedded within said mixture and between the first and second major surfaces. The porosity of the sheet product is at least about 60 volume percent composed of pores such that the average pore diameter increases from each major surface toward the interior of the sheet product's thickness.

A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a polycarbonate polymer and a filler or a polycarbonate and a structure enhancing agent, said sheet product having a porous sheet embedded within said mixture and between the first and second major surfaces. The porosity of the sheet product is at least about 50 volume percent composed of pores such that the nominal pore diameter increases incrementally from each major surface towards the interior central portion of the sheet product's thickness.

A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a polymer and a filler or a polymer and a structure enhancing agent and having a porous sheet embedded between the first and second major surface. The porosity of the sheet product is at least about 50 volume percent having a pore distribution such that the nominal pore diameter increases from each major surface towards the interior central portion of the sheet product's thickness.

A battery separator composed of a microporous sheet product having first and second major surfaces and a thickness of less than about 50 mils, formed from a uniform mixture of a thermoplastic polyurethane polymer having a high degree of hard segments with a filler or said polyurethane with a structure enhancing agent, said sheet product having a sheet embedded within said mixture and between the first and second major surfaces. The sheet product has porosity of at least about 50 volume percent composed of pores such that the nominal pore diameter increases from each major surface towards the interior, center of the sheet product's thickness.

Microporous polyurethane based battery separator

This invention is directed to allyl polyalkylene ethers and to a solid matrix having incorporated therein the allyl polyalkylene ethers. The solid matrix is used in an electrolytic cell.

Allyl polyalkylene ether polymers and solid electrolytes for an

This invention is directed to solid electrolytes containing a solvent and, in particular, a solvent comprising certain substituted tetrahydrofurans, substituted 1,3-dioxolanes, substituted 1,4-dioxanes, and substituted tetrahydropyrans.

Cyclic ethers, solid electrolytes containing such ethers and

A sheet product useful as a battery separator in the form of a microporous base sheet having spaced T-shaped (cross-sectional) ribs extending from one surface of the base sheet.

Battery separators with T-shaped ribs

A method of removing iron contaminants in an aqueous system by introducing and maintaining within the system at least one ortho dihydroxyaromatic compound having at least one electron withdrawing group pendant from the aromatic ring and, further, a method of inhibiting calcium scale formation in the presence of iron contaminants by utilizing at least one dehydroxyaromatic compound in combination with calcium scale inhibitors.

Growing community of inventors

Gilroy, CA, United States of America

Joseph T Lundquist