Invention Application
- Patent Title: ANODE STRUCTURE WITH BINDERS FOR SILICON AND STABILIZED LITHIUM METAL POWDER
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Application No.: US16067795Application Date: 2017-01-04
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Publication No.: US20190013513A1Publication Date: 2019-01-10
- Inventor: Gao LIU , Sergey D. LOPATIN , Eric H. LIU , Ajey M. JOSHI , Guo AI , Zhihui WANG , Hui ZHAO , Donghai WANG
- Applicant: Applied Materials, Inc.
- International Application: PCT/US2017/012192 WO 20170104
- Main IPC: H01M4/139
- IPC: H01M4/139 ; H01M4/62 ; H01M4/04 ; H01M4/38 ; H01M4/587 ; H01M4/36 ; H01M4/48 ; H01M10/0525

Abstract:
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.
Public/Granted literature
- US11069888B2 Anode structure with binders for silicon and stabilized lithium metal powder Public/Granted day:2021-07-20
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