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公开(公告)号：US20220336813A1
公开(公告)日：2022-10-20
申请号：US17659302
申请日：2022-04-14
Applicant: Applied Materials, Inc.
Inventor： SUBRAMANYA P. HERLE , Gao LIU , Jie GUAN , James CUSHING , Ajey M. JOSHI , Tianyu ZHU , Chen FANG , Thanh-Nhan TRAN
Abstract: Polyimide binders and their polyamic precursors to be used for forming electrode structures are provided. The designed polyamic binder precursors are water-soluble, and the resulting polyimide binders are mechanically strong, electrochemically and thermally stable. The properties of polyimide binders have led to significant improvement in electrode compatibility towards new manufactural processes.
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公开(公告)号：US20190013513A1
公开(公告)日：2019-01-10
申请号：US16067795
申请日：2017-01-04
Applicant: Applied Materials, Inc.
Inventor： Gao LIU , Sergey D. LOPATIN , Eric H. LIU , Ajey M. JOSHI , Guo AI , Zhihui WANG , Hui ZHAO , Donghai WANG
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.
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