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US 9,287,544 B2Granted
Heat-resistant porous film, separator for nonaqueous battery, and nonaqueous battery
AssigneeHitachi Maxell, Ltd.
InventorsNobuaki Matsumoto, Hisao Kanzaki
Life of this patent
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Abstract
A nonaqueous battery having a high level of safety and high-temperature storability, a heat-resistant porous film capable of serving as a separator material for separating positive and negative electrodes from each other and capable of forming the nonaqueous battery, and a separator capable of forming the nonaqueous battery are provided.
Claims10
A heat-resistant porous film formed on a porous base material for forming a separator for a nonaqueous battery or on an electrode used in a nonaqueous battery,
- wherein the heat-resistant porous film comprises at least an organic binder and particles having a heat-resistant temperature of 130° C. or higher,
- the heat-resistant porous film has pores capable of transmitting Li ions in the nonaqueous battery,
- as the organic binder, the heat-resistant porous film comprises a polymer having a backbone derived from a polymeric double bond and a group having a cyclic structure including an amide bond, the polymer having a glass transition temperature of 130° C. or higher and a weight-average molecular weight of 350,000 or more, and
- a 180° peel strength between the heat-resistant porous film and the porous base material or the electrode is 0.6 N/cm or more.
1 more element
Dependencies are inferred from the claim text.