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Composite material, preparation method of composite material, and lithium ion battery

A technology of lithium-ion batteries and composite materials, which is applied in the field of composite materials and its preparation, can solve the problems that the performance does not meet the requirements of industrial production and application, and has not been effectively improved.

Active Publication Date: 2019-05-14
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most oxides mainly exist in the form of powder nanoparticles in the application of solid-state batteries, which have not been effectively improved, and the performance has not yet met the requirements of industrial production and application.

Method used

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  • Composite material, preparation method of composite material, and lithium ion battery

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Experimental program
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Effect test

specific Embodiment approach 1

[0029] A composite material, the composite material includes an oxide electrolyte and nano attapulgite, and the oxide electrolyte covers the nano attapulgite.

[0030] Further, the thickness of the oxide electrolyte coating layer is ≤20 μm, and the lithium ion conductivity of the oxide electrolyte coating layer is on the order of 10 -5 S / cm to 10 -3 S / cm. The rod crystals of the nano-attapulgite are 100nm-50μm long and 10nm-120nm wide, and the nano-attapulgite has been commercialized.

[0031] Further, the oxide electrolyte is lithium phosphate, lithium titanate, lithium titanium phosphate, lithium titanium aluminum phosphate, lithium lanthanum titanate, lithium lanthanum tantalate, lithium germanium aluminum phosphate, lithium silicon phosphate, lithium aluminosilicate, three One or more of boron oxide doped lithium phosphate, lanthanum zirconium lithium oxygen, lanthanum zirconium aluminum lithium oxygen, niobium doped lithium lanthanum zirconium oxide, tantalum doped li...

Embodiment 1

[0047] A method for preparing a composite material, comprising the steps of:

[0048] Step 1: In terms of molar parts, 140.00 parts of lithium nitrate, 420.00 parts of phosphoric acid, and 280.00 parts of titanium sulfate are configured into a mixed aqueous solution, and citric acid and 12.4 parts by mass of nano-attapulgite are added to the mixed aqueous solution, wherein the metal cation and lemon The molar ratio of the acid is 1:1.2, stir evenly and add ammonia water to keep the pH value of the solution at 7, continue to stir until a gel is formed, heat to 60°C and perform vacuum treatment, and the mixed system is obtained after the aqueous solution is completely volatilized. The mixed system was microwaved at 180°C for 2 hours, cooled to room temperature, washed with deionized water, and vacuum-dried at 60°C for 12 hours to obtain the precursor powder A system;

[0049] Step 2: Heat the precursor powder A system to 400°C for 0.5h to eliminate residual organic matter, then ...

Embodiment 2

[0055] A method for preparing a composite material, comprising the steps of:

[0056] Step 1. In molar parts, 140.00 parts of lithium sulfate, 60.00 parts of lanthanum nitrate, 35.00 parts of zirconium chloride, and 5.00 parts of niobium pentachloride are configured into a mixed aqueous solution, and citric acid and 4.2 parts by mass of nano Attapulgite, wherein the molar ratio of metal cations to citric acid is 1:1.6, stir evenly and add ammonia water to keep the pH value of the solution at 7, continue stirring until a gel is formed, heat to 70°C and perform vacuum treatment, After the aqueous solution is completely volatilized, a mixed system is obtained. The mixed system is microwaved at 200°C for 4 hours, cooled to room temperature, washed with ethanol, and vacuum-dried at 90°C for 24 hours to obtain the precursor powder A system;

[0057] Step 2: Heat the precursor powder A system to 490°C for 0.9 hours to eliminate residual organic matter, then sinter at 900°C, and after...

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Abstract

The invention provides a composite material, a preparation method of the composite material, and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The specific schemeis as follows: the composite material comprises an oxide electrolyte and nano attapulgite; and the oxide electrolyte coats the nano attapulgite. The coating thickness of the oxide electrolyte is lessthan or equal to 20 microns; and the rodlike crystal length of the nano attapulgite is 100 nanometers to 50 microns, and the width of the nano attapulgite is 10-120 nanometers. The invention furtherprovides the preparation method of the composite material and the lithium ion battery containing the composite material. The oxide electrolyte coated attapulgite has a lithium ion rapid transmission channel of a rodlike structure in the nanometer level, can promote the transmission of lithium ions, and has good lithium ion conductivity and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a composite material, a preparation method thereof and a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in digital products and power supplies due to their high energy density and long service life. However, the electrolyte of liquid lithium-ion batteries has shortcomings such as volatile and low flash point, and there may be safety problems such as leakage, fire, and explosion during use. At the same time, under the background of increasing energy density requirements, 350Wh / kg may be close to the limit of liquid lithium-ion batteries, and the bottleneck of energy density is becoming increasingly prominent. The safety performance and energy density of liquid lithium-ion batteries limit its application range. [0003] Solid-state batteries have better safety and higher energy density, which is the development t...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCY02E60/10B82Y30/00H01M10/0525H01M4/62H01M10/0562H01M2300/0071C01B25/45H01M2300/0068H01M4/13C01G35/006C01G25/006C01P2002/54B82Y40/00H01M4/0407H01M4/364
Inventor 唐伟超李素丽赵伟袁号李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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