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Pole piece containing solid electrolyte and preparation method and application thereof

A solid-state electrolyte and pole piece technology, which is applied in electrode manufacturing, electrolyte layer coating, non-aqueous electrolyte battery, etc., can solve the problems of hindering lithium ion shuttle, reducing battery chemical performance, poor lithium conduction performance, etc., to achieve energy density improvement, The effect of improving battery performance and improving lithium-conducting performance

Active Publication Date: 2019-11-01
江西力能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During long-term use, the battery will spontaneously form an SEI film and grow lithium dendrites, hindering the shuttle of lithium ions, and poor lithium conduction performance, reducing the chemical performance of the battery

Method used

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  • Pole piece containing solid electrolyte and preparation method and application thereof
  • Pole piece containing solid electrolyte and preparation method and application thereof
  • Pole piece containing solid electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A pole piece containing a solid electrolyte includes a pole piece body and a solid electrolyte coating 5 coated on one or both sides of the pole piece body, and the thickness of the solid electrolyte coating 5 is 5 μm;

[0028] The solid electrolyte coating 5 includes the following raw materials, calculated in parts by weight, 0.5 parts of a dispersant, 10 parts of a solid electrolyte, 1 part of a binder, and 100 parts of a solvent.

[0029] The pole piece body includes a positive pole piece 2 and a negative pole piece 3 .

[0030] A method for preparing a pole piece containing a solid electrolyte, comprising the following steps:

[0031] S1: first disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 1 hour at the same time, the stirring speed is 800r / min, and the preparation get dispersion slurry;

[0032] S2: dissolving the binder...

Embodiment 2

[0045] A pole piece containing a solid electrolyte includes a pole piece body and a solid electrolyte coating 5 coated on both sides of the pole piece body, and the thickness of the solid electrolyte coating 5 is 10 μm;

[0046] The solid electrolyte coating 5 includes the following raw materials, calculated in parts by weight, 1 part of dispersant, 25 parts of solid electrolyte, 3 parts of binder, and 100 parts of solvent.

[0047] The pole piece body includes a positive pole piece 2 and a negative pole piece 3 .

[0048] A method for preparing a pole piece containing a solid electrolyte, comprising the following steps:

[0049] S1: First disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 2 hours at the same time, the stirring speed is 800r / min, and the preparation get dispersion slurry;

[0050] S2: dissolving the binder in solvent B t...

Embodiment 3

[0063] A pole piece containing a solid electrolyte includes a pole piece body and a solid electrolyte coating 5 coated on both sides of the pole piece body, and the thickness of the solid electrolyte coating 5 is 20 μm;

[0064] The solid electrolyte coating 5 includes the following raw materials, calculated in parts by weight, 2 parts of a dispersant, 40 parts of a solid electrolyte, 5 parts of a binder, and 100 parts of a solvent.

[0065] The pole piece body is a positive pole piece 2 and a negative pole piece 3 .

[0066] A method for preparing a pole piece containing a solid electrolyte, comprising the following steps:

[0067] S1: first disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 3 hours at the same time, with a stirring speed of 800r / min. get dispersion slurry;

[0068] S2: dissolving the binder in solvent B to obtain a bin...

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Abstract

The invention discloses a pole piece containing solid electrolyte. The pole piece includes a pole piece body and a solid electrolyte coating layer coated on one side surface or both side surfaces of the pole piece body, wherein the solid electrolyte coating layer has a thickness of 5-20 mum, the solid electrolyte coating layer includes raw materials, by weight, 0.5-2 parts of dispersing agent, 10-40 parts of solid electrolyte, 1-5 parts of binder, 50-100 parts of solvent A and 50-100 parts of solvent B. The invention further discloses a method of preparing the pole piece and an application ina lithium battery, a surface of the pole piece is very smooth, moreover, a diaphragm needing to be provided in a conventional battery is omitted, and performance is better than the conventional battery.

Description

technical field [0001] The invention belongs to the field of lithium batteries, and in particular relates to a pole piece containing a solid electrolyte and a preparation method and application thereof. Background technique [0002] As we all know, lithium-ion batteries are widely used in 3C digital products, new energy vehicles and other fields. Traditional lithium-ion batteries are mainly composed of battery casings, positive and negative electrode materials, separators, and electrolytes. In order to achieve the excellent electrochemical performance of lithium batteries, it is necessary to uniformly coat the positive and negative electrode material powders on the current collectors of the positive and negative electrode materials to form pole pieces. During long-term use, the battery will spontaneously form an SEI film and grow lithium dendrites, hindering the shuttle of lithium ions, and poor lithium conduction performance, which reduces the chemical performance of the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139H01M4/62H01M10/052
CPCH01M4/0407H01M4/139H01M4/621H01M10/052Y02E60/10
Inventor 侯伟侯民郭农庆
Owner 江西力能新能源科技有限公司
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