Gm Global Technolgoy Operations, Inc.

Basf Se Corporation

Rhode Island Board of Education, State of Rhode Island and Providence Plantations

Ionblox, Inc.

Rhode Island Council on Postsecondary Education

Yingnan Dong

Mei Cai

Li Yang

Michael Schmidt

Arnd Garsuch

Frederick Francois Chesneau

Brett L Lucht

Julien Demeaux

Xiaosong Huang

Herman Adrian Lopez

Fang Dai

Subramanian Venkatachalam

Stefano Meini

Usha Kiran Tottempudi

Michael Rohde

Bo Zhang

Improved negative electrodes can comprise a silicon based active material blended with graphite to provide more stable cycling at high energy densities. In some embodiments, the negative electrodes comprise a blend of polyimide binder mixed with a more elastic polymer binder with a nanoscale carbon conductive additive. Electrolytes have been formulated that provide for extended cycling of cells incorporating a mixture of a silicon-oxide based active material with graphite active material in negative electrodes that can be matched with positive electrodes comprising nickel rich lithium nickel manganese cobalt oxides to cells with unprecedented cycling properties for large capacity cell based on a silicon negative electrode active material.

Lithium ion cells with high performance electrolyte and silicon oxide active materials achieving very long cycle life performance

An electrolyte composition including (i) at least one aprotic organic solvent; (ii) at least one conducting salt; (iii) at least one pyridine-SOcomplex of formula (I) wherein R is selected independently at each occurrence from F, Cto Calkyl, Cto Calkenyl, and Cto Calkynyl, wherein alkyl, alkenyl, and alkynyl may be substituted by one or more substituents selected from F and CN; and n is an integer selected from 1, 2, 3, 4, and 5; and (vi) optionally one or more additives; and its use in electrochemical cells.

Pyridine sulfur trioxide complexes as electrolyte component for high voltage batteries

An electrolyte composition (A) containing at least one aprotic organic solvent and at least one compound of formula (I) wherein Ais selected from Li, Na, K, Cs, and ammonium; is a bidentate radical derived from a (hetero)aromatic 1,2-, 1,3- or 1,4-diol, from a (hetero)aromatic 1,2-, 1,3- or 1,4-dicarboxylic acid or from a (hetero)aromatic 1,2-, 1,3- or 1,4-hydroxycarboxylic acid by abstracting the two H atoms of pairs of adjacent OH groups; and Rand Rare organic substituents. 

Non-aqueous electrolytes for lithium-ion batteries comprising asymmetric borates

A highly-concentrated electrolyte system for an electrochemical cell is provided, along with methods of making the electrolyte system. The electrolyte system includes a bound moiety having an ionization potential greater than an electron affinity and comprising one or more salts selected from the group consisting of: lithium bis(fluorosulfonyl)imide, sodium bis(fluorosulfonyl)imide, potassium bis(fluorosulfonyl)imide, and combinations thereof bound to a solvent comprising one or more solvents selected from the group consisting of: dimethyl carbonate, dimethyl dicarbonate, and combinations thereof. The salts have a concentration in the electrolyte system of greater than or equal to about 4 M. A molar ratio of the salts to the dimethyl carbonate is about 0.5. A molar ratio of the salts to the dimethyl dicarbonate is about 1. The salts binds to the dimethyl carbonate and/or dimethyl dicarbonate causing the electrolyte system to be substantially free of unbound dimethyl carbonate, unbound dimethyl dicarbonate, and unbound bis(fluorosulfonyl)imide.

Carbonate-based electrolyte system improving or supporting efficiency of electrochemical cells having lithium-containing anodes

In the formation of cathodes for lithium-sulfur battery cells, it is often desired to form the cathodes by resin-bonding particles of a sulfur-based cathode material as a porous cathode material layer on the surface(s) of a suitable metal current collector. It is found that the use of a copolymer of polyethylene oxide and polyvinyl alcohol, dissolved in water, provides a resin-particle slurry that is readily spreadable onto the current collector surface to form a uniform layer of porous cathode material particles. And upon evaporation of the water, the copolymer-bonded, sulfur-based particle coated cathodes function very well in assembled lithium-sulfur cells.

PEO-PVA based binder for lithium-sulfur batteries

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Fremont, CA, United States of America

Yingnan Dong