University of California

Applied Materials, Inc.

Zhihui Wang

Gao Liu

Sergey D Lopatin

Ajey M Joshi

Donghai Wang

Hui Zhao

Eric H Liu

Guo Ai

Vince Battaglia

A simple solution processing method is developed to achieve uniform and scalable stabilized lithium metal powder coating on Li-ion negative electrode. A solvent and binder system for stabilized lithium metal powder coating is developed, including the selection of solvent, polymer binder and enhancement of polymer concentration. The enhanced binder solution is 1% concentration of polymer binder in xylene, and the polymer binder is chosen as the mixture of poly(styrene-co-butadiene) rubber (SBR) and polystyrene (PS). Long-sustained, uniformly dispersed stabilized lithium metal powder suspension can be achieved with the enhanced binder solution. A uniform stabilized lithium metal powder coating can be achieved with simple doctor blade coating method and the resulting stabilized lithium metal powder coating can firmly glued on the anode surface. With the prelithiation of negative electrode by stabilized lithium metal powder, improvements in electrochemical performances are demonstrated in both graphite/NMC and SiO/NMC full-cell.

Anode structure with binders for silicon and stabilized lithium metal powder

An embodiment of the invention describes an calendaring apparatus comprising a roller press comprising a first roller and a second roller, a static electricity generator, a motor drive system in communication with the first roller and the second roller to impart rotation to first roller and the second roller, wherein the static electricity generator imparts a static charge to a surface of the first roller, and a material holding tray for holding a material in communication with the first roller.

Instrumentation to dry-deliver SLMP particles to the lithium-ion electrode

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Fremont, CA, United States of America

Zhihui Wang