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Collector, electrode structure, electricity storage component, and composition for collectors

A technology of current collectors and components, applied in the field of current collectors, can solve problems such as internal short circuit, external temperature rise, battery thermal damage, etc.

Inactive Publication Date: 2015-08-05
FURUKAWA SKY ALUMINUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sometimes it happens that the temperature rises further above the melting point of the separator due to incomplete closure of the separator, or an internal short circuit occurs due to the melting of the separator due to an increase in external temperature.
In these cases, the shutdown function of the separator can no longer be expected and the battery will be subject to thermal damage

Method used

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  • Collector, electrode structure, electricity storage component, and composition for collectors
  • Collector, electrode structure, electricity storage component, and composition for collectors
  • Collector, electrode structure, electricity storage component, and composition for collectors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The latex-based polyolefin resin (polyolefin-based latex particles) shown in Table 1 is a water-based latex type maleic acid-modified polypropylene resin, and its mixing amount is 100 parts by mass. ) in an amount of 0.1 parts by mass, the two were mixed to obtain a resin solution, 25 parts by mass of acetylene black was mixed in the resin solution, and dispersed by a ball mill for 8 hours to make a coating. The resulting paint was coated on one side (Gravure coater) of an aluminum foil (JIS A1085) with a thickness of 15 μm by a gravure coater so that the coating film thickness was 2 μm (the weight of the coating film was 2 g / m 2 ). In order to make the film adhere, the substrate temperature (PMT) was heated to 110° C. for 24 seconds to produce a current collector electrode. Hereinafter, the substrate, coating, and drying conditions are the same as those in this embodiment, so the description will not be repeated.

Embodiment 2～16

[0092] The latex-based polyolefin resin (polyolefin-based latex particles) shown in Table 1 is a mixture of the following resins: (denatured by maleic acid) polypropylene (PP), (denatured by maleic acid) polyethylene (PE ) resin, (denatured by maleic acid) polyethylene-polypropylene (PE-PP) block polymerization (Block polymerization) resin, (denatured by maleic acid) polyethylene-polypropylene (PE-PP) graft Polymerization (Graft polymerization) resin, (by maleic acid denatured) polypropylene (PP) resin and (by maleic acid denatured) polyethylene (PE) resin. The mixing amounts of the various components are shown in Table 1, and a current collector electrode was produced in the same procedure as in Example 1.

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Abstract

Provided are: a highly safe collector which is capable of stably maintaining a PTC function even in cases where the temperature is further increased after the exhibition of the PTC function if used in an electrode structure of an electricity storage component such as a nonaqueous electrolyte battery, an electric double layer capacitor or a lithium ion capacitor; an electrode structure; an electricity storage component; and a composition for collectors. Provided is a collector (100) which is provided with a conductive base (103) and a resin layer (105) that is provided on at least one surface of the conductive base (103). The resin layer (105) is obtained by applying a paste, which contains polyolefin emulsion particles (125), a conductive material (121) and a crosslinking agent (131), onto the conductive base (103) and crosslinking the paste thereon. The polyolefin emulsion particles (125) contain a polyolefin resin (129) that is modified with a carboxylic acid or a carboxylic acid anhydride at both ends.

Description

【Technical field】 [0001] The present invention relates to a current collector, an electrode structure, an electrical storage component (including a non-aqueous electrolyte battery, an electric double layer capacitor, a lithium ion capacitor, etc.) and a composition for a current collector. 【Background technique】 [0002] When lithium-ion batteries used in vehicles, etc., encounter accidents such as malfunctions under normal use, the so-called shutdown that stops charging and discharging spontaneously and safely is required for high rate charging and discharging characteristics. function (i.e. PTC function). For the former, the existing technologies include: reducing the particle size of the active material or forming a conductive layer on the current collector; for the latter, as a means of improving battery safety: using a safety valve to prevent internal When the pressure rises, install a PTC (Positive Temperature Coefficient) component whose resistance increases as the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01C7/02H01G11/68H01M4/13
CPCH01G11/68H01M4/667Y02E60/13H01M4/668H01M4/661H01C7/02H01M4/666H01M2/348H01M10/0525H01M50/581H01M10/052H01M2200/106Y02E60/10H01G11/26H01M4/663
Inventor 齐藤聡平加藤治本川幸翁八重樫起郭片冈次雄井上光哉山部乡史盛岛泰正伊藤贵和原英和饭田恭宏
Owner FURUKAWA SKY ALUMINUM CORP
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