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 t

Method used

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Examples

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Example Embodiment

[0035] Example one

[0036] The solid-state battery binder composition includes: copolymers containing alkylene structural units and nitrile-containing monomer units, fluorine-containing high molecular polymers, conductive high molecular polymers, sulfonated polymers, inorganic substances and organic solvents .

[0037] The alkylene structural unit is a repeating unit consisting of only the general formula: -CnH2n-[where n is an integer of 4 or more]. It can be linear or branched. There is no special method for introducing the alkylene structural unit into the copolymer. As a limitation, a copolymer can be prepared based on a monomer composition containing a conjugated diene monomer such as 1,3-butadiene and 1,3-pentadiene, and alkylene is formed by hydrogenating the copolymer Copolymers of base 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.

[0039]...

Example Embodiment

[0047] Example two

[0048] The solid-state battery binder composition includes: copolymers containing alkylene structural units and nitrile-containing monomer units, fluorine-containing high molecular polymers, conductive high molecular polymers, sulfonated polymers, inorganic substances and organic solvents .

[0049] The alkylene structural unit is a structural unit formed by hydrogenation of 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 containing the alkylene structural unit and the nitrile group-containing monomer unit is 60% by mass. The content ratio of the copolymer in all polymers constituting the solid battery binder composition is 90% by mass.

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

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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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