Navitas Systems, LLC

Solutia Incorporated

A123 Systems LLC

T/j Technologies, Inc.

Other

Toyota Motor Engineering & Manufacturing North America, Inc.

Toyota Motor Corporation

Pu Zhang

Michael R Wixom

Aristotelis Karagiannis

Peter Aurora

Yinong Ma

Yalda Farhoudi

Megan Lee Szlosek

Suresh Mani

Qingliu Wu

Junqing Ma

Emmett Dudley Crawford

Scott Ellery George

Khanh Duc Tran

Liya Wang

Francois Andre Koran

Steven Vincent Haldeman

Weihong Cui

Pinguan Zheng

Aireal Denise Pressley

Shih-Chieh Yin

Brian Glomski

Paul Hastings

Monique Nathalie Richard

Kimber Lee Stamm

Hanwei Lei

Robert Sosik

Yet-Ming Chiang

William M Risen, Jr

Viet H Vu

Wen Li

Iftikhar Ahmad

Hong Wang

Clayton R DeCamillis

Young-Il Jang

Shoji Yokoishi

Andrew Cardin

Jinjun Shi

John M Miller

Michael L Hampton

William O Hicks

Jun Q Chin

Christopher Silkowski

Chris Silkowski

Devon Renock

Intae Bae

Timothy K Sendek

Elizabeth Mueller

James E Webb, Jr

Bob Sosik

Provided are electrodes that may be used in electrochemical cells that incorporate relatively high loading of active material while also demonstrating excellent adhesion, resistance to mechanical breakdown, and also offer improved capacity retention, particularly at discharge rates of C/2 or greater.

High loading electrodes

Provided are compositions and methods of malting and using free-standing electrode films for electrodes by a dry process. The process for forming an electrode includes combining a processing additive and an active electrode material or fibrillizable binder to form an electrode precursor material, where the processing additive has a surface roughness and a porosity and intermixing the electrode precursor material. The electrode precursor material may then be combined with the fibrillizable binder or the active electrode material and the fibrillizable binder or the active electrode material is intermixed with the electrode precursor material to form an electrode film material. The electrode film material includes the processing additive, the fibrillizable binder and the active electrode material. The electrode film material is then compressed into an electrode film.

Compositions and methods for electrode fabrication

Provided are electrode active materials with a porous structure and including a metal, that when loaded with sulfur serve as electrochemically superior cathode active materials. The metal structures are optionally used on their own, are coated with another material, or coats another porous structure such as a porous carbon structure that allows for excellent retention of both sulfur and polysulfides, are conductive themselves, and show long term stability and excellent cycle life.

Cathode and cathode materials for lithium sulfur batteries

Provided are electrodes that include an electrode dry mixture and a dry electrolyte material intermixed with the electrode dry mixture; and a binder intermixed with the electrode dry mixture and the dry electrolyte material, said binder comprising fibrils; the electrode dry mixture, dry electrolyte material, and said binder in the form of a dry electrode film. The electrolyte material may include a glass ceramic and, optionally, an air-stabilizing dopant. The glass ceramic may include LiPS. The electrodes may include a composite cathode of the dry electrode film and optionally further include a solid-state electrolyte layer. Also provided are methods for forming the electrodes, optionally where the methods may be applicable for a solvent-free process to form electrodes and electrochemical cells and batteries including the electrodes.

Dry process formation of solid state lithium ion cell

Provided are processes to form microporous silicon useful as an active material in an electrode of an electrochemical cell the processes including subjecting a mixture of silicon oxide and a metal reducing agent, optionally aluminum, to mechanical milling to form mechanically activated silicon oxide/aluminum, thermally treating the silicon oxide/aluminum to reduce the silicon oxide and form Si/AlO, and removing at least a portion of the alumina from the Si to form a microporous silicon. The resulting electrochemically active microporous silicon is also provided with residual alumina present at 15% by weight or less that demonstrates excellent cycle life and safety.

Processes to fabricate porous silicon and its use as feedstock for secondary battery electrodes

Provided are materials that may be used in or as a separator in an electrochemical cell such as a lithium sulfur battery. The separator includes a material capable of absorbing and desorbing a polysulfide. The inclusion of the materials in a separator provide for reduced sulfur loss from a cathode during cycling thereby improving cycle life.

Separator for lithium sulfur batteries

Methods for preparing an electrode may include compressing an electrode dry mixture comprising an active material and an electrolyte material to form an electrode film. An electrolyte dry mixture or a stand-alone solid-state electrolyte film is compressed against a surface of the electrode film to form a laminate of an electrolyte layer and the electrode film. The electrolyte dry mixture may include the electrolyte material. Compressing the electrode dry mixture may include calendering the electrode dry mixture. Compressing the electrolyte dry mixture or stand-alone electrolyte film may be accomplished also by calendering. The electrolyte material may include a glass ceramic and, optionally, an air-stabilizing dopant. The glass ceramic may include LiPS. Thus, the electrodes may include a composite cathode and a solid-state electrolyte layer. The methods may be applicable for a solvent-free process to form electrodes and electrochemical cells and batteries including the electrodes.

The present application discloses interlayers comprising novel polyesteramides comprising diols with tunable properties based on the monomers and monomer ratios used to prepare the polyesteramides and varying the reaction conditions. The interlayers have improved properties and can be used in many different applications.

Interlayers comprising polyesteramide compositions

Provided are electrochemically active materials capable of absorbing and desorbing an ion suitable for use in secondary cells. The provided materials include a core consisting of a plurality of silicon particulates of a particle size less than 1 micrometer, the particulates intermixed with and surrounded by a silicon metal alloy composite, and an electrochemically active buffering shell layer enveloping at least a portion of the core such that the resulting electrochemically active material has an overall particle size with a maximum linear dimension of greater than one micrometer.

Core-shell electrochemically active particles with modified microstructure and use for secondary battery electrodes

Provided are electrode active materials that include a metal oxide or oxynitride with a porous structure that when loaded with sulfur serve as electrochemically superior cathode active materials. The metal nitride or metal oxynitride structures are optionally used on their own, are coated with another material, or itself coats another porous structure such as a porous carbon structure that allows for excellent retention of both sulfur and polysulfides, are conductive themselves, and show long term stability and excellent cycle life.

Metal nitride or oxynitride cathode materials for lithium sulfur batteries

Growing community of inventors

Ann Arbor, MI, United States of America

Pu Zhang