Separator for battery having a function of avoiding dangers caused by overheat, and method for producing the same
AssigneesNoritake Co., Limited, Sanyo Chemical Industries, Ltd.
InventorsKenji Yano, Misao Iwata, Hirokazu Matsunaga, Yukio Shibata, Yoshio Tanimizu
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Abstract
To provide a separator for a battery with high safety and a method for producing the same in which the separator has a shutdown function and capability of preventing meltdown, complete melting and cracks when the battery performs unusually. This separator comprises a porous ceramic sheet having ceramic fibers bonded to each other at their intersection points and polyolefin and comprises micropores for impregnation of an electrolyte.
Claims29
A separator for a battery comprising a porous ceramic sheet formed of ceramic fibers bonded to one another at their points of intersection and a polyolefin bonded to the ceramic sheet and having micropores capable of being impregnated with an electrolyte.
A separator for a battery comprising a porous ceramic sheet formed of ceramic fibers bonded to one another at their points of intersection and
- a polyolefin bonded to the ceramic sheet and having micropores capable of being impregnated with an electrolyte,
- wherein the ceramic sheet has been surface-treated with a silane coupling agent.
A separator for a battery comprising a porous ceramic sheet formed of ceramic fibers bonded to one another at their points of intersection and a polyolefin bonded to the ceramic sheet, and having micropores capable of being impregnated with an electrolyte, wherein the polyolefin comprises a modified polyolefin selected from the group consisting of a carboxyl-modified polyolefin, a dicarboxylic anhydride-modified polyolefin and an epoxy-modified polyolefin, or said polyolefin comprises a mixture of the modified polyolefin with an unmodified polyolefin.
Dependencies are inferred from the claim text.