Polyplus Battery Company, Inc.

Valentina Loginova

Steven J Visco

Yevgeniy S Nimon

Bruce D Katz

Vitaliy Nimon

Lutgard C De Jonghe

Nikolay Goncharenko

Alexei Petrov

An intermediary solid electrolyte structure having a Li ion conducting solid electrolyte layer covered with a thin as-deposited lithium phosphorus nitride film. A surface protected solid electrolyte having a solid electrolyte layer having a first major surface that is covered by a composite protective film, the composite protective film having a lithium phosphorus material component and a phosphorus nitride material component. A physical vapor deposition target for the deposition of a composite protective film, the target having a compacted composite material target having a mosaic structure. Methods of making thin films.

Binary phosphorus nitride protective solid electrolyte intermediary structures for electrode assemblies

Battery component structures and manufacturing methods for solid-state battery cells include a unitary Li ion conducting sulfide glass solid electrolyte structure that serves as the basic building block around which a solid-state battery cell can be fabricated. The unitary glass structure approach can leverage precision controlled high throughput processes from the semiconductor industry that have been inventively modified as disclosed herein for processing a sulfide glass solid electrolyte substrate into a unitary Li ion conducting glass structure, for example, by using etching and lithographic photoresist formulations and methods. The glass substrate may be precision engineered to effectuate a dense glass portion and a porous glass portion that can be characterized as sublayers having predetermined thicknesses. The porous glass sublayer includes a plurality of discrete substantially vertical closed-end holes or trenches that are precision engineered into one or both major substrate surfaces using microfabrication processes.

Glass solid electrolyte layer, methods of making glass solid electrolyte layer and electrodes and battery cells thereof

Preparation of anhydrous lithium sulfide (LiS) purified suitably for applications in advanced batteries, and, in particular, for synthesis of solid electrolytes based on LiS, including sulfide solid electrolytes of the type that may be described as crystalline (e.g., polycrystalline), amorphous (e.g., glass) and combinations thereof, such as sulfide glass-ceramic solid electrolyte materials.

Lithium ion conducting sulfide glass fabrication

Lithium sulfur battery cells that use water as an electrolyte solvent provide significant cost reductions. Electrolytes for the battery cells may include water solvent for maintaining electroactive sulfur species in solution during cell discharge and a sufficient amount of a cycle life-enhancing compound that facilitates charging at the cathode. The combination of these two components enhances one or more of the following cell attributes: energy density, power density and cycle life. For instance, in applications where cost per Watt-Hour (Wh) is paramount, such as grid storage and traction applications, the use of an aqueous electrolyte in combination with inexpensive sulfur as the cathode active material can be a key enabler for the utility and automotive industries, for example, providing a cost effective and compact solution for load leveling, electric vehicles and renewable energy storage. Sulfur cathodes, and methods of fabricating lithium sulfur cells, in particular for loading lithium sulfide into the cathode structures, provide further advantages.

Lithium sulfur batteries and electrolytes and sulfur cathodes thereof

Provided are lithium sulfur battery cells that use water as an electrolyte solvent. In various embodiments the water solvent enhances one or more of the following cell attributes: energy density, power density and cycle life. Significant cost reduction can also be realized by using an aqueous electrolyte in combination with a sulfur cathode. For instance, in applications where cost per Watt-Hour (Wh) is paramount, such as grid storage and traction applications, the use of an aqueous electrolyte in combination with inexpensive sulfur as the cathode active material can be a key enabler for the utility and automotive industries, providing a cost effective and compact solution for load leveling, electric vehicles and renewable energy storage.

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Walnut Creek, CA, United States of America

Valentina Loginova