Amprius, Inc.

Amprius Technologies, Inc.

Weijie Wang

Jonathan Bornstein

Constantin Ionel Stefan

Song Han

Zuqin Liu

Chentao Yu

Daniel Seo

Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon-based coating is provided. The silicon coating may include a non-conformal, more porous silicon-rich SiElayer and a conformal, denser SiElayer on the non-conformal, more porous layer. In some embodiments, two different deposition processes are used: a PECVD layer to deposit the non-conformal, silicon-rich SiElayer and a thermal CVD process to deposit the conformal layer. The silicon-rich SiEmaterial prevents silicon crystalline domain growth, limits macroscopic swelling, increases lithium diffusion rate and enhances significantly battery life during lithium ion battery cycle of charge and discharge.

Compositionally modified silicon coatings for use in a lithium ion battery anode

Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.

Structurally controlled deposition of silicon onto nanowires

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Sunnyvale, CA, United States of America

Weijie Wang