Preparation method of ultrathin nano-lithium lanthanum zirconium oxygen all-solid-state electrolyte layer

A technology of lithium lanthanum zirconium oxygen and electrolyte layer is applied in the field of all-solid-state batteries, which can solve problems such as potential safety hazards of lithium ion batteries, and achieve the effects of convenient operation, simple preparation process and easy availability of raw materials

Inactive Publication Date: 2016-08-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic electrolyte currently used is a potential safety hazard for lithium-ion batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Take 1 weight part of lithium lanthanum zirconium oxygen, 0.5 weight part of LiPF 6 As a lithium salt, 0.1 parts by weight of PVDF as a binder and 0.1 parts by weight of FC4430 as a dispersant were added to 10 parts by weight of a solvent isopropanol. After stirring for 10 hours, it was transferred to a zirconia ball mill jar, and ball milled for 1 hour at a milling speed of 800 r / min to obtain nano-lithium lanthanum zirconium oxide slurry.

[0022] 2) Coating the nano-lithium lanthanum zirconium oxide slurry on the surface of the electrode material by screen printing, and annealing at 200°C for 12 hours to obtain a nanometer lithium lanthanum zirconium oxide all-solid electrolyte layer with a thickness of about 1 micron.

Embodiment 2

[0024] 1) Get 1 weight part of lithium lanthanum zirconium oxygen, 1 weight part of LiPF 6 As a lithium salt, 0.1 parts by weight of PVDF as a binder and 0.1 parts by weight of Tween 80 as a dispersant were added to 10 parts by weight of isopropanol as a solvent. After stirring for 1 hour, it was transferred to a zirconia ball mill jar, and ball milled for 3 hours at a milling speed of 1000 r / min to obtain nano-lithium lanthanum zirconium oxide slurry.

[0025] 2) The nano-lithium lanthanum zirconium oxide slurry is coated on the surface of the electrode material by inkjet printing, and annealed at 100°C for 24 hours to obtain a nanometer lithium lanthanum zirconium oxide all-solid electrolyte layer with a thickness of about 5 microns.

Embodiment 3

[0027] 1) Take 1 part by weight of lithium lanthanum zirconium oxide, 1 part by weight of LiTFSI as a lithium salt, 0.1 part by weight of CMC as a binder, and 0.05 parts by weight of SDS as a dispersant, add 5 parts by weight of solvent PC and EC to mix solution (the volume ratio of PC to EC is 1:3). After stirring for 12 hours, it was transferred to a zirconia ball mill jar, and ball milled for 12 hours at a milling speed of 1200 r / min to obtain nano-lithium lanthanum zirconium oxide slurry.

[0028] 2) Coating the nano-lithium lanthanum zirconium oxide slurry on the surface of the electrode material by screen printing, and annealing at 60°C for 12 hours to obtain a nanometer lithium lanthanum zirconium oxide all-solid electrolyte layer with a thickness of about 1 micron.

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Abstract

The invention discloses a preparation method of an ultrathin nano-lithium lanthanum zirconium oxygen all-solid-state electrolyte layer. The method includes: preparation of a nano-lithium lanthanum zirconium oxygen slurry; and film formation from the nano-lithium lanthanum zirconium oxygen slurry. The preparation process is simple, the preparation process has no need for a mold and pressure, the electrolyte layer shapes naturally, the operation is convenient, and the energy consumption is low. The raw materials are wide and easily available, the preparation process is controllable, and the repeatability is high. The solid electrolyte film prepared by the method has thickness up to 1 micrometer.

Description

technical field [0001] The invention relates to the field of all-solid-state batteries, in particular to a method for preparing an ultra-thin lithium-lanthanum-zirconium-oxygen all-solid-state electrolyte layer. Background technique [0002] Since the commercialization of lithium-ion batteries, they have been widely used in various fields. However, the currently used organic electrolyte is a potential safety hazard for lithium-ion batteries. Inorganic solid electrolytes have the advantages of good safety, high energy density, good cycle performance, and good temperature adaptability, and can fundamentally solve the safety problems of liquid electrolytes. [0003] Lithium lanthanum zirconium oxide is a kind of oxide solid electrolyte, which has good stability in air, high ionic conductivity, and simple synthesis. The chemical formula of lithium lanthanum titanium oxide compound is Li7La3Zr 2 O12, the current all-solid-state battery, mainly adopts the method of powder press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCH01M10/0562Y02E60/10
Inventor 韩伟强严旭丰李卓斌
Owner ZHEJIANG UNIV
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