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Solid battery pack binder composition

A binder and battery pack technology, applied in battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of high interface resistance, easy oxidation, high cost, etc., and achieve high bonding strength, high cohesion, inhibiting The effect of the dilation effect

Inactive Publication Date: 2018-12-14
ZHEJIANG GODSEND POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the challenges brought about by air sensitivity, easy oxidation, high interface resistance, and high cost are not easy to solve in the short term, so there is still a long way to go before the final application of all-solid-state lithium batteries with sulfide electrolytes

Method used

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Experimental program
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Embodiment 1

[0036] The solid-state battery pack binder composition includes: a copolymer comprising an alkylene structural unit and a nitrile-containing monomer unit, a fluorine-containing high molecular polymer, a conductive high molecular polymer, a sulfonated polymer, an inorganic substance and an organic solvent .

[0037] The alkylene structural unit is a repeating unit consisting of only the general formula: -CnH2n-[wherein, n is an integer greater than 4], which can be linear or branched, and there is no special method for introducing the alkylene structural unit to the copolymer. Defined, it is possible to prepare copolymers based on monomer compositions comprising conjugated diene monomers such as 1,3-butadiene, 1,3-pentadiene, by hydrogenating the copolymers to form alkylene Copolymers of basic structural units.

[0038] The nitrile group-containing monomer unit is a repeating unit having a nitrile group-containing monomer, and acrylonitrile is selected in this embodiment.

[...

Embodiment 2

[0048] The solid-state battery pack binder composition includes: a copolymer comprising an alkylene structural unit and a nitrile-containing monomer unit, a fluorine-containing high molecular polymer, a conductive high molecular polymer, a sulfonated polymer, an inorganic substance and an organic solvent .

[0049] The alkylene structural unit is a structural unit obtained by hydrogenating a 1,3-butadiene unit.

[0050] The nitrile group-containing monomer unit is a repeating unit of α-chloroacrylonitrile monomer.

[0051] In this embodiment, the content ratio of the nitrile-group-containing monomer unit in the copolymer comprising the alkylene structural unit and the nitrile-group-containing monomer unit is 60% by mass. The content ratio of the copolymer in all the polymers constituting the solid battery binder composition was 90% by mass.

[0052] Wherein, in this embodiment, the fluorine-containing high molecular polymer comprises a structural unit represented by the foll...

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Abstract

A solid-state battery pack binder composition disclosed in the invention comprises a copolymer comprising an alkylene structural unit and a nitrile-containing monomer unit, a fluoropolymer, a conductive polymer, a sulfonated polymer, an inorganic substance and an organic solvent. A binder composition for all-solid-state batteries capable of producing all-solid-state batteries having good battery characteristics can be provided.

Description

technical field [0001] The invention belongs to the technical field of solid-state batteries, and in particular relates to a solid-state battery pack binder composition. Background technique [0002] All-solid-state lithium batteries are relative to liquid lithium batteries, which refer to energy storage devices that do not contain liquid in the structure and all materials exist in solid form. Specifically, it consists of positive electrode material + negative electrode material and electrolyte, while the liquid lithium battery is composed of positive electrode material + negative electrode material + electrolyte and separator. [0003] In solid-state ionics, a solid-state battery is a battery that uses solid electrodes and a solid electrolyte. Solid-state batteries generally have low power density and high energy density. Due to their high power-to-weight ratio, they are ideal batteries for electric vehicles. [0004] The traditional liquid lithium battery is also vividly...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/052
CPCH01M4/622H01M4/623H01M10/052Y02E60/10
Inventor 孙建平叶张军张玉花张文魁周晓政
Owner ZHEJIANG GODSEND POWER TECH
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