Film forming method for lithium ion rechargeable batteries

Details Film forming method for lithium ion rechargeable batteries Film forming method for lithium ion rechargeable batteries

1996-11-04

1998-02-24

Skapars, Anthony

Metal working

Method of mechanical manufacture

Electrical device making

H01M 600

Patent

active

057207801

ABSTRACT:
A novel processing method provides a separator or electrode film demonstrating good physical properties and excellent conductive properties. Specifically, a binder of a suitable polymer, such as a polyvinylidene difluoride (PVdF) homopolymer, and a filler material such as silica or alumina are homogenized, such as by ball milling, to form a mixture free of solvents or plasticizers. An appropriate plasticizer, such as dimethyl adipate, is mixed into the binder and filler materials, and the resulting material is formed into a sheet. The sheet is hot pressed or melt processed at a temperature greater than the softening point but less than the melting point of the polymer mix. Electrode films can also be made using the method herein.

REFERENCES:
patent: 5296318 (1994-03-01), Gozdz et al.
patent: 5418091 (1995-05-01), Gozdz et al.
patent: 5429891 (1995-07-01), Gozdz et al.
patent: 5456000 (1995-10-01), Gozdz et al.

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