UChicago Argonne, LLC

U.S. Department of Energy

Gregory K Krumdick

Krzysztof Pupek

Trevor L Dzwiniel

Vojislav Stamenkovic

John N Hryn

Yuepeng Zhang

Rongyue Wang

Ozgenur Kahvecioglu

Devon J Powers

Nenad Markovic

Sanja Tepavcevic

Peter Zapol

Krzystof Z Pupek

Michael John Counihan

Joseph A Libera

Yujia Liang

YoungHo Shin

Kaname Takeya

Santanu Chaudhuri

Stephen Cotty

Youngho Shin

Ozgenur Kahvecioglu Feridun

Young Ho Shin

Reusable filters for personal protective equipment (PPE) may prevent shortages of PPE and save fabrication time, resources, and money. Disclosed is a method and system for fabrication of nanofiber filter media for PPE. The method includes positioning a substrate to receive nanofibers thereon, providing a voltage gradient in a region of the substrate, and electrospinning nanofibers onto the substrate. The methods and associated systems allow autoclaving of the filter medium at temperatures of up to 300 degrees for sanitizing the filter medium. Additionally, the methods and associated system allow for the inclusion of an anti-pathogen agent in the nanofiber filter media.

Nanofiber filter medium for reusable facemask and filtering facepiece respirator

A cathode for a multilayer solid-state electrochemical cell is described herein. The cathode comprises nanofibers of a cathode active material; particles of the cathode active material; and nanofibers of a cubic phase lithium lanthanum zirconium oxide (c-LLZO); all of which are dispersed in a polymeric matrix. Electrochemical cells comprising a solid-state electrolyte and the cathodes comprising the nanofibers of c-LLZO are also described herein.

Nanofiber polymer composite cathodes

A process for forming cubic LLZO through the use of atomic mixing of metal salts used in an aerosol process. The cubic LLZO is formed at temperatures below 1000° C.

Method of tuning the conversion temperature of cubic phase of aluminum-doped lithium lanthanum zirconium oxide

A solid-state electrolyte for a multilayer solid-state electrochemical cell is described herein. The electrolyte comprises a lithium electrolyte salt and nanofibers of a cubic phase lithium lanthanum zirconium oxide (c-LLZO), and a polymer interspersed with the nanofibers and electrolyte salt. Electrochemical cells comprising the solid-state electrolyte, and solid-state cathodes comprising the nanofibers of c-LLZO are also described herein.

Solid-state nanofiber polymer multilayer composite electrolytes and cells

A process for synthesis of PtNi high surface area core/shell particles. The processing including formation of PtNi nanoparticles, exposure of the PtNi nanoparticles to oxygen to form a nickel oxide coating on the nanoparticles at the same time the segregation of Ni to surface induces a Pt-skin with PtNi core structure, removal of the nickel oxide coating to form PtNi core/Pt shell (or Pt-skin) structure.

Segregation induced core-shell structure

The invention provides a cathode active material having a discrete change in concentrations of a first base region and a second pulse region. Also provided is a method for preparing a cathode active material, the method having the steps: supplying chelating agent, aqueous basic solution and a first aqueous metal salt solution to a reactor to create a base region; supplying a second aqueous metal-salt solution to a reactor to form a pulse region, wherein the second aqueous metal-salt solution is intermittently or continuously added during or after the creation of the base region; thermally treating the base region and the pulse region to create active metal precursors; mixing the precursors with lithium salt to produce a mixture; and thermally treating the mixture.

Tangent gradient concentration material for battery, digital gradient concentration material for battery

A method for producing water resistant cathodes is discussed. The method uses mixing cathode powder with solid carbon dioxide to create a mixture and heating the mixture to a temperature. The heating occurs for a time sufficient to cause lithium carbonate coatings to form on the powder. A method for coating lithium-containing cathode surfaces is also discussed. This method uses simultaneously sublimating solid COand condensing atmospheric water vapor onto surfaces. Afterwards allowing the lithium to react with the sublimated COfor a time sufficient to create a lithium carbonate film on the surface.

Carbon dioxide treatment of cathodes

A method for scaled-up synthesis of PtNi nanoparticles. Synthesizing a Pt nanoparticle catalyst comprises the steps of: synthesizing PtNi nanoparticles, isolating PtNi/substrate nanoparticles, acid leaching the PtNi/substrate, and annealing the leached PtNi/substrate nanoparticles, and forming a Pt-skin on the PtNi/substrate nanoparticles.

Systems and methods for scale-up synthesis multi-layered Pt-skin nanoparticle catalysts

A method for synthesis of PtNi nanocages by synthesizing Pt1Ni6 nanoparticles and acid leaching to form PtNi nanocages. The acid leaching removes nickel selectively from the core of the nanoparticle.

Systems and methods for PTNI nanocages

A solvent useful for lithium batteries comprises a compound of Formula (I): (R)(R)(R)Si&#x2014;R&#x2014;O&#x2014;C(O)&#x2014;[(O&#x2014;R)&#x2014;(O&#x2014;C(O)]&#x2014;O&#x2014;R&#x2014;X. Each of Rand Rindependently is alkyl; Ris alkyl, &#x2014;X&#x2014;Si(R)(R)(R), or &#x2014;CH&#x2014;O&#x2014;C(O)&#x2014;O&#x2014;R; Xis H or &#x2014;Si(R)(R)(R); each of Rand Rindependently is alkylene; each Rindependently is Cto Calkylene; each of R, R, R, and Rindependently is alkyl; Xis O or alkylene; each of Rand Rindependently is alkyl; Ris alkyl or &#x2014;X&#x2014;Si(R)(R)(R); each of R, R, and Rindependently is alkyl; Xis O or alkylene; m is 0 or 1, and n is 1-3; and when m is 0 and Ris alkyl, Xis &#x2014;Si(R)(R)(R). Also described is a method for manufacturing a compound of Formula (II): (R)(R)(R)Si&#x2014;CH&#x2014;O&#x2014;C(O)&#x2014;O&#x2014;Rwhere each R, R, R, and Ris alkyl.

Solvent for non-aqueous battery

A reaction apparatus includes a hollow chamber with a stirring shaft. The chamber is maintained at a predetermined pressure and accepts at least two reactants from two storage tanks. The stirring shaft rotates around an axis and creates a reaction product. Taylor vortexes are created while the pressure minimizes the volume possession of the gas phase. The reaction product of micron and sub-micron particles is removed from the chamber and depressurized.

Pressurized Taylor Vortex reactor

The invention provides a method for producing halogenated carbonates, the method comprising reacting a halogenated alcohol or diol with a solid source of carbonyl moiety as a base in an ether.

Process for producing fluorinated electrolyte solvent

A method for producing halogenated carbonates is provided, the method having the steps of reacting a halogenated hydroxyl moiety with an alkyl formate in the presence of a liquid solvent and a solid base. An exemplary halogenated carbonate so produced is trifluoroethyl methyl carbonate.

Process for the production of high voltage electrolyte solvents for Li-ion batteries

The invention provides a method for producing a molecule capable of undergoing reduction-oxidation when subjected to a voltage potential, the method comprising phosphorylating hydroquinone to create a first intermediate; rearranging the first intermediate to an aryl-bis-(phosphonate) thereby creating a second intermediate comprising phosphorous alkoxy groups; alkylating (e.g., methylating) the second intermediate; converting the alkoxy groups to halides; and substituting the halides to alkyl or aryl groups. Also provided is a system for preventing overcharge in a Lithium-ion battery, the method comprising a mixture of a redox shuttle with electrolyte in the battery such that the shuttle comprises between about 10 and about 20 weight percent of the mixture.

High voltage redox shuttles, method for making high voltage redox shuttles

The invention provides a system for preparing specific sized particles, the system comprising a continuous stir tank reactor adapted to receive reactants; a centrifugal dispenser positioned downstream from the reactor and in fluid communication with the reactor; a particle separator positioned downstream of the dispenser; and a solution stream return conduit positioned between the separator and the reactor. Also provided is a method for preparing specific sized particles, the method comprising introducing reagent into a continuous stir reaction tank and allowing the reagents to react to produce product liquor containing particles; contacting the liquor particles with a centrifugal force for a time sufficient to generate particles of a predetermined size and morphology; and returning unused reagents and particles of a non-predetermined size to the tank.

Growing community of inventors

Homer Glen, IL, United States of America

Gregory K Krumdick