Partition with heat-resistant insulation

A heat-resistant insulation and separator technology, used in hybrid capacitor separators, layered products, cellulose plastic material layered products, etc., can solve problems such as the increase in the amount of adsorbed water and the impact of battery cycle characteristics and output characteristics.

Active Publication Date: 2017-09-22
ENVISION AESC JAPAN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the presence of a heat-resistant insulating layer containing inorganic particles and a binder, the amount of adsorbed moisture increases compared to a separator with only a porous matrix, and when the separator is applied to a battery, the cycle characteristics and output of the battery are affected. properties are likely to be affected

Method used

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  • Partition with heat-resistant insulation
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Examples

Experimental program
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Effect test

Embodiment 1

[0118] Alumina particles (BET specific surface area: 5m 2 / g, average particle size 2 μm) 95 parts by mass and carboxymethyl cellulose as a binder (moisture content per unit binder mass: 9.12 mass%, manufactured by Nippon Paper Chemical Co., Ltd., Sunrose (registered trademark) MAC series) 5 parts by mass were uniformly dispersed in water to prepare an aqueous solution. This aqueous solution was applied to both surfaces of a polyethylene (PE) microporous membrane (film thickness: 18 μm, porosity: 55%) using a gravure coater. Then, water was removed by drying at 60° C., and a separator with a heat-resistant insulating layer (heat-resistant insulating layer) of a multilayer porous film with a total film thickness of 25 μm was formed on both sides of the porous membrane with heat-resistant insulating layers of 3.5 μm each. Gram weight 10g / m 2 ).

[0119] In addition, the BET specific surface area of ​​an inorganic particle is the value measured by the following measuring method...

Embodiment 2

[0129] A separator with a heat-resistant insulating layer was produced as in Example 1, except that a BET specific surface area was used: 7m 2 / g of alumina particles.

Embodiment 3

[0131] A separator with a heat-resistant insulating layer was produced as in Example 1, except that a BET specific surface area was used: 15m 2 / g of alumina particles.

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Abstract

The separator 1 with a heat-resistant insulating layer is provided with a porous base 2, and a heat-resistant insulating material formed on one or both sides of the porous base 2 and containing at least one or more inorganic particles and at least one or more binders. Separator 1 with heat-resistant insulating layer of layer 3; wherein, the content ratio of inorganic particles and binder by mass is inorganic particles: binder = 99:1 ~ 85:15, the BET specific surface area of ​​inorganic particles 3~50m2 / g, 0.0001

Description

technical field [0001] The present invention relates to separators with heat-resistant insulating layers. More specifically, the present invention relates to a separator with a heat-resistant insulating layer that can be applied to electrical devices such as lithium ion secondary batteries and electric double layer capacitors. Background technique [0002] In recent years, from the viewpoint of environment and fuel cost, hybrid vehicles (HEV), electric vehicles (EV), and fuel cell vehicles have been manufactured and sold, and new developments have continued. In these so-called electric vehicles, use of a power supply device capable of discharging and charging is indispensable. As the power supply device, secondary batteries such as lithium-ion secondary batteries and nickel-hydrogen secondary batteries, electric double-layer capacitors, and the like are used. In particular, lithium-ion secondary batteries are suitable for use in electric vehicles due to their high energy d...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01M2/16B32B23/18H01G11/52H01M50/443H01M50/449H01M50/457
CPCH01G11/52H01M10/052H01M50/446H01M50/449H01M50/443H01M50/457B32B5/022B32B5/024B32B5/30B32B2260/025B32B2260/046B32B2264/102B32B2264/105B32B2307/304B32B2307/306B32B2457/10Y02T10/70Y02E60/10H01G9/02H01M50/489H01M50/451H01M50/491H01M50/4295H01M50/431C08J5/2206C08K3/28H01M10/0525Y02E60/13C08K3/20
Inventor本田崇宫竹一希齐藤治之平井珠生村松宏信
OwnerENVISION AESC JAPAN LTD