SEPARATOR FOR ALKALINE BATTERY, METHOD FOR PRODUCING THE SAME, AND BATTERY
First Claim
1. A separator for alkaline batteries having a composite sheet comprising:
- a polyvinyl alcohol nanofiber layer formed from a modified polyvinyl alcohol polymer and having a fiber diameter of 10 to 1000 nm, the nanofiber layer having a liquid absorption amount by fibers of 4.0 to 40.0 g/g after immersion in a 35% aqueous solution of KOH; and
a base layer joined to the nanofiber layer, the base layer comprising a wet-type nonwoven material made of alkaline resistant fibers.
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Accused Products
Abstract
Provided is a separator for alkaline batteries which can not only prevent batteries from internal short circuit by inhibiting the dendrite formation at anode, but also enables to have a low electrical resistance. The separator for alkaline batteries comprises a composite sheet in which a base layer comprising a wet-type nonwoven material formed from alkaline resistant fibers is covered with a nanofiber layer comprising a modified polyvinyl alcohol fiber which has a fiber diameter of 10 to 1000 nm and a liquid absorption amount by fibers of 4.0 to 40.0 g/g after immersion in a 35% aqueous solution of KOH.
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Citations
12 Claims
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1. A separator for alkaline batteries having a composite sheet comprising:
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a polyvinyl alcohol nanofiber layer formed from a modified polyvinyl alcohol polymer and having a fiber diameter of 10 to 1000 nm, the nanofiber layer having a liquid absorption amount by fibers of 4.0 to 40.0 g/g after immersion in a 35% aqueous solution of KOH; and a base layer joined to the nanofiber layer, the base layer comprising a wet-type nonwoven material made of alkaline resistant fibers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification