Activation film and preparation method and application thereof

An activation layer and activation material technology, applied in electrical components, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as reducing the energy density of lithium batteries, and achieve the effects of easy large-scale production, simple preparation methods, and low environmental requirements

Pending Publication Date: 2019-01-15
LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercial separator materials are mainly made of PP/PE, and the surface is coated with a layer of alumina material or ceramic material, which can imp

Method used

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  • Activation film and preparation method and application thereof
  • Activation film and preparation method and application thereof
  • Activation film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0085] Example 1

[0086] This embodiment provides an activation film, including a base film and an activation layer coated on one side of the base film. The base film is a polypropylene porous film with a thickness of 12um. It adopts a single-sided coating method with a coating thickness At 2um, an active layer is formed. According to the mass ratio of the coating slurry: 20% of the activated material, 80% of N-methylpyrrolidone (NMP); among them, the preparation of the lithiated composition according to the mass ratio: 50% of the activated material nano silicon powder, particle size D50 is 200nm, and the binder PVDF is 50%.

[0087] The pre-lithiation film in this embodiment is prepared by the following method, which specifically includes the steps:

[0088] (1) Add the binder PVDF and deionized water into the pre-mixed tank according to the above ratio, and dissolve completely to obtain the mixture I;

[0089] (2) Gradually add the active material nano silicon powder to the mixtu...

Example Embodiment

[0094] Example 2

[0095] This embodiment provides an activation film, which includes a base film and an activation layer coated on one side of the base film. The base film is a polypropylene porous film with a thickness of 10um. It adopts a single-sided coating method with a coating thickness At 2um, an active layer is formed. The coating slurry used is according to the mass ratio: 20% of the composition, 80% of deionized water; wherein the preparation of the composition according to the mass ratio: the particle size D50 of the gel electrolyte material PVDF-HPF is 200nm, and the binder 1% sodium methylcellulose, 1% styrene-butadiene latex as a binder, 1% sodium polyacrylate as a dispersant, and 1% octylphenol polyoxyethylene as an auxiliary agent.

[0096] The activated film in this embodiment is prepared by the following method, which specifically includes the steps:

[0097] (1) Add the binder sodium carboxymethyl cellulose, the binder styrene-butadiene latex, the dispersant sod...

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Abstract

The invention discloses an activation film, a preparation method and an application thereof. 50um base film and 0.02 um- 100um activated layer; The activate layer comprise: 1 wt%- 99.99 wt% of activated material, 0wt%- 98.99 wt% of coating material, 0.01 wt%- 10wt% binder, 0%- 10wt% of conductive additive material and 0wt%- 2 wt% of dispersant and 0 wt%- 2 wt% of auxiliary agent; The activated material is one kind of material or a combination of many kinds of materials which participate in oxidation reaction, reduction reaction, lithium ion transport, or electron transport during the lithium battery working process.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to an activated film and its preparation method and application. Background technique [0002] Lithium-ion batteries have been successfully used as the main energy storage device in the field of mobile power because of their high output voltage, high energy density, long cycle life, good safety performance, and no memory effect. In order to further meet the needs of grid energy storage, electric vehicles, and consumer electronics for energy storage devices, electrode materials with longer cycle life, better safety, and higher energy density and lithium battery systems have become research hotspots. [0003] The main components of the current commercialized liquid lithium-ion battery are: positive electrode, negative electrode, separator and electrolyte. Among them, the diaphragm material mainly plays the role of insulating the positive electrode material and negat...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/052H01M50/44
CPCH01M10/052H01M50/431H01M50/44Y02E60/10
Inventor 闫昭罗飞李泓
Owner LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
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