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Current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage components

A technology of electrode structures and current collectors, which is applied in the field of electrode structures, non-hydrolytic batteries or power storage components, and current collectors. It can solve the problems of slow lithium deintercalation reaction and low electronic conductivity, and achieve durability. Good, low resistance effect

Active Publication Date: 2018-04-06
FURUKAWA SKY ALUMINUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When using olivine-type lithium phosphate as a positive electrode active material for non-aqueous electrolyte batteries, there are problems that the lithium deintercalation reaction is slow during battery charging and discharging, and the electronic conductivity is very low.

Method used

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  • Current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage components
  • Current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage components
  • Current collectors, electrode structures, non-aqueous electrolyte batteries, and electrical storage components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088]

[0089] An aluminum alloy foil with a foil thickness of 15 μm and a tensile strength of 265 MPa was prepared. Next, prepare a nitrocellulose-based resin solution as a resin and acetylene black (AB) as a conductive material (conductive particles), adjust the mass ratio of the solid content so that the resin for the conductive resin layer: conductive material = 60:40, use A dispersing and kneading device (manufactured by PRIMIX, equipment name: T.K. Combimix) was used to obtain a conductive resin solution with adjusted particle size. On one side of the aluminum foil, the conductive resin solution was coated and dried with hot air to form a conductive resin layer to produce a current collector.

[0090]

[0091] Prepare lithium iron phosphate with a median diameter (D50) of 2.8 μm as the positive active material, dissolve PVDF (polyvinylidene fluoride) in NMP (N-methylpyrrolidone) to obtain a PVDF solution, and conduction aid Carbon was mixed at a mass ratio of solid...

Embodiment 2

[0096]

[0097] An aluminum alloy foil with a foil thickness of 15 μm and a tensile strength of 265 MPa was prepared. Next, prepare the PVDF resin solution and the conductive material acetylene black as the resin, adjust the mass ratio of the solid content, resin for the conductive resin layer: conductive material=70:30, use a dispersion and kneading device (manufactured by PRIMIX company, the equipment name is : T.K.Combi mix) to obtain the conductive resin solution after adjusting the particle size. On one side of the aluminum foil, the conductive resin solution was coated and dried with hot air to form a conductive resin layer to produce a current collector. Using the current collector, an electrode structure and a single-layer laminated battery were produced in the same manner as in Example 1 for other steps.

Embodiment approach 3

[0099]

[0100] An aluminum alloy foil having a foil thickness of 15 μm and a tensile strength of 195 MPa was prepared. Next, prepare chitosan-based resin solution and conductive acetylene black as resin, adjust the mass ratio of solid content to be resin for conductive resin layer: conductive material=67:33, and use a dispersion and kneading device (manufactured by PRIMIX company, equipment Name: T.K.Combi mix) to obtain the conductive resin solution after adjusting the particle size. On one side of the aluminum foil, the conductive resin solution was coated and dried with hot air to form a conductive resin layer to produce a current collector. Using the current collector, an electrode structure and a single-layer laminated battery were produced in the same manner as in Example 1 for other steps.

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Abstract

The present invention provides a current collector with little visible deformation after pressurization, low electrical resistance, and good durability, and an electrode structure, a nonaqueous battery, or an electrical storage device using the current collector. The present invention provides a current collector with a conductive resin layer on at least one side of the aluminum foil, the conductive resin layer contains a resin layer and conductive particles, the tensile strength of the aluminum foil is more than 180 MPa, and the surface of the conductive resin layer of the current collector is The indentation hardness is 600 MPa or less, and the area occupancy of the conductive particles on the surface of the conductive resin layer is 45% or more.

Description

【Technical field】 [0001] The present invention relates to a current collector, an electrode structure, a nonaqueous battery or an electrical storage component, and can be used in various nonaqueous batteries or electrical storage components such as lithium ion secondary batteries. 【Background technique】 [0002] At present, due to the application of lithium-ion secondary batteries, people have great expectations for the miniaturization and high performance of mobile phones and other products, and there are also strong expectations for high energy density and low cost of batteries. For example, in Patent Document 1 and Patent Document 2, an attempt is made to manufacture a higher density electrode material because the pressure is increased compared to the prior art when the positive electrode plate is pressurized. [0003] In addition, in terms of the positive electrode active material of the lithium ion secondary battery, LiCoO is used in consideration of high energy density...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/02H01M4/136H01M4/58H01M10/058
CPCH01M4/661H01M4/668H01M4/667Y02E60/10Y02P70/50H01M4/5825H01M10/0525
Inventor 片冈次雄井上光哉山部乡史加藤治本川幸翁齐藤聪平八重樫起郭
Owner FURUKAWA SKY ALUMINUM CORP
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