Secondary battery and method for producing the same

Details Secondary battery and method for producing the same Secondary battery and method for producing the same

2008-07-22

2008-07-22

Cantelmo, Gregg (Department: 1795)

Metal working

Method of mechanical manufacture

Electrical device making

C429S246000

Reexamination Certificate

active

11655164

ABSTRACT:
In a secondary battery including a positive electrode, a negative electrode and a porous film bonded to the surface of at least one of the positive electrode and the negative electrode, the porous film includes ceramic particles and a binder, and the ceramic particles include polycrystalline particles obtained by mechanically crushing a fired material comprising a ceramic that is directly synthesized from a ceramic precursor. The porous film has a porosity of 40 to 80%, for example. The porous film can be formed by a method including the steps of: obtaining a fired material comprising a ceramic from a ceramic precursor; obtaining ceramic particles by mechanically crushing the fired material of the ceramic; obtaining a slurry including the ceramic particles and a binder; and applying the slurry onto the surface of an electrode, followed by drying.

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