Separator for alkaline batteries, and alkaline battery

A technology for alkaline batteries and separators, applied in the direction of alkaline batteries, battery pack parts, electrical components, etc., can solve problems such as difficult to increase at the same time, and achieve the effect of reducing the resistance value

Active Publication Date: 2018-08-03
NIPPON KODOSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shielding property and resistance value of the separator, and the strength and resistance value have an inverse relationship, and it is difficult to improve all of these characteristics at the same time

Method used

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  • Separator for alkaline batteries, and alkaline battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170] 10% by mass of a raw material having a CSF value of 450 ml obtained by beating and mercerizing softwood kraft pulp, 50% by mass of polypropylene fibers, and 40% by mass of nylon fibers were mixed and short-wired to obtain a substrate. A coating liquid in which polyvinyl alcohol was dissolved was applied on the base material and dried to obtain a thickness of 15 μm and a density of 0.25 g / cm 3 , coating amount 0.1g / m 2 , Dimensional change rate of 2.5%, wet strength of 6.5N, liquid retention rate of 500%, electrical resistance of 9.0mΩ, shielding property of 1 piece, droplet disappearance time of 60 seconds on the A side and 20 seconds on the B side.

Embodiment 2

[0172] On a base material subjected to short-wire papermaking using the same raw materials as in Example 1, a coating solution in which polyvinyl alcohol and polyacrylic acid were dissolved was applied and dried to obtain a thickness of 15 μm and a density of 0.25 g / cm 3 , coating amount 1.0g / m 2 , Dimensional change rate of 2.5%, wet strength of 6.4N, liquid retention rate of 500%, electrical resistance of 8.2mΩ, shielding property of 1, droplet disappearance time of 65 seconds on the A side and 20 seconds on the B side. In addition, the additive content rate of this coating layer was 90.0%.

Embodiment 3

[0174] On a base material subjected to short-wire papermaking using the same raw materials as in Example 1, a coating solution in which polyvinyl alcohol and polyacrylic acid were dissolved was applied and dried to obtain a thickness of 15 μm and a density of 0.25 g / cm 3 , coating amount 1.1g / m 2 , Dimensional change rate of 2.5%, wet strength of 6.4N, liquid retention rate of 500%, electrical resistance of 8.2mΩ, shielding property of 1, droplet disappearance time of 65 seconds on the A side and 20 seconds on the B side. In addition, the additive content rate of this coating layer was 90.9%.

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Abstract

Provided is a separator for alkaline batteries, which has low resistance, while exhibiting excellent strength in electrolyte solutions and excellent shielding properties. A separator for alkaline batteries, which is used for the purpose of separating a positive electrode active material and a negative electrode active material from each other and holding an electrolyte solution. This separator foralkaline batteries is composed of: a base layer that is formed only of alkali-resistant fibers; and an alkali-resistant resin layer that contains 0.1-25 g / m2 of an alkali-resistant resin. The alkali-resistant fibers of the base layer are configured to contain alkali-resistant cellulose fibers in an amount of 10-100% by mass.

Description

technical field [0001] The invention relates to a separator for alkaline batteries used in alkaline batteries such as alkaline manganese batteries, nickel-zinc batteries, silver oxide batteries, and zinc-air batteries, which use zinc as the negative electrode active material. Moreover, this invention relates to the alkaline battery which used this separator for alkaline batteries. Background technique [0002] In the past, as the required characteristics of the separator for separating the positive electrode active material and the negative electrode active material in the alkaline battery, it can be mentioned that it has the ability to prevent the contact between the positive electrode active material and the negative electrode active material and the discharge of the negative electrode. Poor shielding against short-circuits caused by needle-like crystals (dendrites) of zinc oxide; and durability to retain electrolytes such as potassium hydroxide without causing shrinkage a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/414H01M50/417
CPCD21C3/02D21C5/00D21C5/005D21C9/10D21H11/12D21H17/005H01M6/04H01M10/24Y02E60/10H01M50/446H01M50/4295H01M50/44H01M50/417H01M50/414D21H17/56D21H27/00
Inventor 黑岩正宽小川健太郎和田典弘井河笃
Owner NIPPON KODOSHI
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