Uchicago Argonne, LLC

Lu Zhang

Zhengcheng Zhang

Khalil Amine

Anthony Keiran Burrell

Ilya A Shkrob

Jinhua Huang

Jingjing Zhang

Andrew Norbert Jansen

Zhangxing Shi

Zonghai Chen

Wei Weng

Stephen Trask

Sambasiva Reddy Bheemireddy

John Thomas Vaughey

Fikile Richard Brushett

An electrochemical device includes a compound that is an isatin derivative. The electrochemical device may be a lithium ion battery, a sodium ion battery, or a redox flow battery, and the isatin derivative may be a bipolar redox active material.

Isatin derivative redoxamer for electrochemical device

An silicon-containing electrode is formed by coating a silicon-containing slurry onto a conductive current collector. The slurry comprises a binder solution comprising a poly(carboxylic acid) binder dissolved in a mixed solvent system comprising an amide solvent of Formula I, as described herein, and a second solvent which can be water and/or an organic solvent. The binder preferably comprises poly(acrylic acid). The mixed solvent system comprises about 10 to about 99 vol % of the amide solvent of Formula I. The binder solution is utilized as a solvent for a slurry of silicon-containing particles for preparing the silicon-containing electrode. The slurries comprising the mixed solvent system have higher viscosity and are more stable than slurries containing the same concentrations of silicon particles, carbon particles, and binder in water as the sole solvent.

Solvents and slurries comprising a poly(carboxylic acid) binder for silicon electrode manufacture

Isatin derivative redoxmer for electrochemical device

A binder solution for manufacturing silicon-based anodes useful for lithium-ion electrochemical cells is described herein. The binder solution comprises a poly(carboxylic acid) binder dissolved in a mixed solvent system comprising an amide solvent of Formula I, as described herein, and a second solvent which can be water and/or an organic solvent. The binder preferably comprises poly(acrylic acid). The mixed solvent system comprises about 10 to about 99 vol % of the amide solvent of Formula I. The binder solution is utilized as a solvent for a slurry of silicon-containing particles for preparing a silicon-containing electrode. The slurries made with the mixed solvent systems have higher viscosity and are more stable than slurries containing the same concentrations of silicon particle, carbon particles, and binder in water as the sole solvent.

An electrode for a lithium-ion electrochemical cell comprises silicon particles and carbon particles coated on a conductive current collector. The silicon and carbon particles being bound to each other and to the current collector by a cross-linked binder formed from a combination of a poly(carboxylic acid) such as poly(acrylic acid) and a branched polyethyleneimine. A method of preparing the anode also is described.

Binders for silicon electrodes in lithium-ion batteries

The present invention provides a redox flow battery comprising a negative electrode (also referred to herein as an 'anode') immersed in a first liquid electrolyte (also referred to herein as a 'negative electrolyte' or &#x201c;anolyte&#x201d;), a positive electrode (also referred to herein as a &#x201c;cathode&#x201d;) immersed in a second liquid electrolyte (also referred to herein as a &#x201c;positive electrolyte&#x201d; or &#x201c;catholyte&#x201d;), and a cation-permeable separator (e.g., a membrane or other cation-permeable material) partitioning the negative electrode/anolyte from the positive electrode/catholyte. The redox reactant of the catholyte comprises a compound of Formula (I) as described herein.

Organic redox molecules for flow batteries

A non-aqueous redox flow battery includes a catholyte including a compound of formula (I): wherein Eand Eare independently O, S, S&#x2550;O, S(&#x2550;O), Se, NR, or PR; The compounds of the present technology are capable of undergoing a reversible two-electron transfer process, thus leading to high efficiency of molecular design and an increase in the overall energy density.

Two-electron redox active molecules with high capacity and energy density for energy storage applications

An electrolyte for a lithium-ion electrochemical cell comprises a non-aqueous solution of a lithium salt and a redox shuttle compound, wherein the redox shuttle compound comprises &#x2014;OR groups at carbons 1 and 4 of a benzene ring; a first hydrocarbon ring fused to carbons 2 and 3 of the benzene ring; and a second hydrocarbon ring fused to the carbons 5 and 6 of the benzene ring, wherein either (i) the first and second hydrocarbon rings together with the benzene ring constitute two fused benzobicyclo[2.2.2]octane ring systems sharing a common benzo core group; or (ii) the first and second hydrocarbon rings together with the benzene ring constitute two fused benzobicyclo[2.2.1]heptane ring systems sharing a common benzo core group.

Annulated tetra-substituted hydroquinone ether-based redox shuttle additives for lithium-ion batteries

An electrolyte for a lithium-ion electrochemical cell comprises a non-aqueous solution of a lithium salt and a redox shuttle salt compound in a non-aqueous solvent, wherein the redox shuttle compound comprises an amino-substituted cyclopropenium salt of Formula (I) as described herein.

Functional organic salt for lithium-ion batteries

A redox flow battery comprising a two-electron, redox active, bridged, multi-cyclic compound ('TRBMC') comprises a non-aromatic, bridged cyclic portion fused to an aromatic cyclic portion.

Two-electron redox catholyte for redox flow batteries

Benzothiophene-based redox molecules for flow battery

The present invention provides a non-aqueous redox flow battery comprising a negative electrode immersed in a non-aqueous liquid negative electrolyte, a positive electrode immersed in a non-aqueous liquid positive electrolyte, and a cation-permeable separator (e.g., a porous membrane, film, sheet, or panel) between the negative electrolyte from the positive electrolyte. During charging and discharging, the electrolytes are circulated over their respective electrodes. The electrolytes each comprise an electrolyte salt (e.g., a lithium or sodium salt), a transition-metal free redox reactant, and optionally an electrochemically stable organic solvent. The redox reactant of the positive electrolyte is a dialkoxybenzene compound, and the redox reactant of the negative electrolyte is a viologen compound or a dipyridyl ketone.

Organic non-aqueous cation-based redox flow batteries

A non-aqueous redox flow battery includes a catholyte including a compound of formula (I) or a compound of formula (II): Where Xis a moiety of formula I-A or I-B: 

Multi-electron redox active molecules for energy storage applications

An ionic liquid that is a salt has a Formula: Such ionic liquids may be used in electrolytes and in electrochemical cells.

Functionalized ionic liquid electrolytes for lithium ion batteries

A non-aqueous redox flow battery includes a catholyte including a compound of formula (I), a compound of formula (II), or a compound of formula (III):  

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Lisle, IL, United States of America

Lu Zhang