National Technology & Engineering Solutions of Sandia, LLC

The United States of America as Represented by the Administrator of the

Other

California Institute of Technology

The United States of America as Represented by the United States

United States of America as Represented by the Administrator of Nasa

Sandia Corporation

The United States of America as Represented by the Administrator

Ganesan Nagasubramanian

Salvador DiStefano

David Ingersoll

Kyle Ross Fenton

Chad Staiger

Travis Mark Anderson

Harry Pratt

Alan I Attia

Eric Allcorn

Gerald Halpert

Ratnakumar V Bugga

Paul Gilbert Clem

Jon Ihlefeld

Susan Lynne Rempe

Clyde P Bankston

Jovan Moacanin

Christopher Alan Apblett

Ranty H Liang

Cynthia Edney

Emmanuel Peled

Christopher Orendorff

Kevin Leung

Mangesh Chaudhari

A method for synthesizing a purified lithium (Li)anion binding agent (ABA-F)salt and the corresponding Li(ABA-F)are disclosed. The method includes dissolving a boron-based acid in a polar solvent to form a solution. The solution is refluxed to form an anion binding agent. A stoichiometric amount of a small fluorinated salt, such as LiF, is added to the anion binding agent to form a mixture. The mixture is subsequently crystallized to obtain a substantially pure Li(ABA-F)salt. Example purified Li(ABA-F)salts include Ox-Li(ABA-F), m-Li(ABA-F), and BF—Li(ABA-F). These purified Li(ABA-F)salts provide the benefits of increased battery thermal safety without loss of electrochemical performance.

Anion binding agent lithium salts for battery electrolytes

Organosilicon electrolytes exhibit several important properties for use in lithium carbon monofluoride batteries, including high conductivity/low viscosity and thermal/electrochemical stability. Conjugation of an anion binding agent to the siloxane backbone of an organosilicon electrolyte creates a bi-functional electrolyte. The bi-functionality of the electrolyte is due to the ability of the conjugated polyethylene oxide moieties of the siloxane backbone to solvate lithium and thus control the ionic conductivity within the electrolyte, and the anion binding agent to bind the fluoride anion and thus facilitate lithium fluoride dissolution and preserve the porous structure of the carbon monofluoride cathode. The ability to control both the electrolyte conductivity and the electrode morphology/properties simultaneously can improve lithium electrolyte operation.

Organosilicon-based electrolytes for long-life lithium primary batteries

Cast components can improve the effectiveness of current state-of-the-art in thermal battery processing technology in terms of cost, labor, materials usage, and flexibility. Cast components can include cast cathodes, anodes, and separators.

Cast thermal battery electrodes and separators using a salt binder

A redox flow battery is described herein that has a sodium-super-ionic-conductor NaSICON barrier disposed between an anolyte chamber of the battery and the catholyte chamber of the battery. The NaSICON barrier prevents crossover of solvents or active redox species between the anolyte chamber and the catholyte chamber, while permitting transport of sodium ions between the chambers. In exemplary embodiments, the anolyte chamber includes an anolyte solution that comprises a first active redox species dissolved in a first solvent, while the catholyte chamber includes a catholyte solution that comprises a second active redox species dissolved in a second solvent.

Aqueous Na-ion redox flow battery with ceramic NaSICON membrane

The present invention is directed to a higher power, thin film lithium-ion electrolyte on a metallic substrate, enabling mass-produced solid-state lithium batteries. High-temperature thermodynamic equilibrium processing enables co-firing of oxides and base metals, providing a means to integrate the crystalline, lithium-stable, fast lithium-ion conductor lanthanum lithium tantalate (LaLiTaO) directly with a thin metal foil current collector appropriate for a lithium-free solid-state battery.

Solid-state lithium battery

The power loss of lithium/lithium ion battery cells is significantly reduced, especially at low temperatures, when about 1% by weight of an additive is incorporated in the electrolyte layer of the cells. The usable additives are organic solvent soluble cyanoethylated polysaccharides and poly(vinyl alcohol). The power loss decrease results primarily from the decrease in the charge transfer resistance at the interface between the electrolyte and the cathode.

Cyanoethylated compounds as additives in lithium/lithium batteries

A composite solid electrolyte film is formed by dissolving a lithium salt such as lithium iodide in a mixture of a first solvent which is a cosolvent for the lithium salt and a binder polymer such as polyethylene oxide and a second solvent which is a solvent for the binder polymer and has poor solubility for the lithium salt. Reinforcing filler such as alumina particles are then added to form a suspension followed by the slow addition of binder polymer. The binder polymer does not agglomerate the alumina particles. The suspension is cast into a uniform film.

Method for forming thin composite solid electrolyte film for lithium

A composite solid electrolyte film for a lithium battery comprising a dispersion of small reinforcing particles such as alumina in a binder rein such as polyethylene oxide. The particles are coated with a compatible lithium salt such as lithium iodide and the alumina particles preferably have a size below 0.5 microns.

Thin composite solid electrolyte film for lithium batteries

A solid-state synaptic memory matrix (10) having switchable weakly conductive connections at each node (24) whose resistances can be selectably increased or decreased over several orders of magnitude by control signals of opposite polarity, and which will remain stable after the signals are removed, comprises an insulated substrate (16), a set of electrical conductors (14) upon which is deposited a layer (18) of an organic conducting polymer, which changes from an insulator to a conductor upon the transfer of electrons, such as polymerized pyrrole doped with 7,7,8,8-tetracyanoquinodimethane (TCNQ), covered by a second set of conductors (20) laid at right angles to the first.

Reversible non-volatile switch based on a TCNQ charge transfer complex

The conductivity is increased an order of magnitude and interfacial charge transfer resistance is substantially decreased by incorporating a minor amount of 12-Crown-4 ether in a polyethylene oxide-lithium salt solid electrolyte film.

Secondary Li battery incorporating 12-Crown-4 ether

An electropolymerized film comprised of polymers and copolymers of a monomer having the general formula: ##STR1## is formed on the surface of an anode. The finished structures have superior electrical and mechanical properties for use in applications such as electrostatic dissipation and for the reduction of the radar cross section of advanced aircraft.

Silicon containing electroconductive polymers and structures made

Higher energy and power densities are achieved in a secondary battery based on molten sodium and a solid, ceramic separator such as a beta alumina and a molten catholyte such as sodium tetrachloroaluminate and a copper chloride cathode. The higher cell voltage of copper chloride provides higher energy densities and the higher power densities result from increased conductivity resulting from formation of copper as discharge proceeds.

Growing community of inventors

Albuquerque, NM, United States of America

Ganesan Nagasubramanian