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Preparation method of 3D printing wire material of solid electrolyte

A solid-state electrolyte and 3D printing technology, which is applied in the preparation of lithium-ion solid-state electrolytes and the preparation of lithium-ion solid-state electrolyte 3D printing filaments. The process is cumbersome and other problems, so as to reduce the risk of chemical reagent poisoning and improve the effect of preparation efficiency

Inactive Publication Date: 2019-11-26
BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the battery preparation process is cumbersome and the degree of automation is low, and the preparation cycle is long; at the same time, the use of solid electrolytes imposes strict technological requirements on the uniformity of the phase distribution inside the electrolyte and the wettability of the solid-solid interface between the electrolyte and the electrode. The controllability of the manual operation process is poor, which reduces the stability of battery performance; in addition, the acetonitrile solvent used in large quantities in the preparation is toxic and has certain bodily harm to the operator

Method used

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preparation example Construction

[0013] A method for preparing a 3D printing filament of a solid electrolyte, characterized in that it comprises the following steps,

[0014] Step 1, the composition of the 3D printing filament precursor material is: lithium trifluoromethanesulfonimide, polyethylene oxide with a molecular weight of 300,000, and vinylidene fluoride-hexafluoropropylene copolymer. The three components are For powdery materials, the mass ratio is 5:13-16:3-6;

[0015] Step 2, 3D printing filament precursor material preparation, put the weighed polyethylene oxide powder with a molecular weight of 300,000 in an open beaker, and then add the weighed vinylidene fluoride-hexafluoropropylene copolymer powder , using a mixer to mix the two evenly for ten minutes; weigh the lithium bistrifluoromethanesulfonimide powder again and put it into the same open beaker, then add absolute ethanol, the ratio of absolute ethanol to the powder mixture 5ml / g~6ml / g, use a mixer to continuously stir for 20 minutes, dis...

Embodiment

[0031] (1) Precursor preparation

[0032] The solid electrolyte precursor includes three material components, lithium trifluoromethanesulfonimide, polyethylene oxide with a molecular weight of 300,000, vinylidene fluoride-hexafluoropropylene copolymer, and bistrifluoromethylsulfonyl Lithium imide is a conductive lithium salt, polyethylene oxide is a polymer electrolyte, and vinylidene fluoride-hexafluoropropylene copolymer is a reinforcing material. The three materials are all powder materials, and the three materials are fully mixed by mechanical mixing , forming a powder mixture, the mass ratio of lithium salt, polyethylene oxide and vinylidene fluoride-hexafluoropropylene is 5 / 15 / 4. The specific steps are as follows: weigh the polyethylene oxide powder and place it in an open beaker, then add the weighed vinylidene fluoride-hexafluoropropylene copolymer powder, stir with a stirrer, and mix the two evenly for ten minutes. Take again by weighing two lithium trifluoromethanes...

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Abstract

The invention discloses a preparation method of a 3D printing wire material of a solid electrolyte. The preparation method is characterized by comprising the following step that S1, precursor materials of the 3D printing wire material comprises the following components of trifluoromethyl sulfonyl imide lithium, polyethylene oxide with the molecular weight of 300 thousand and polyvinylidene fluoride-hexafluoropropylene copolymers, the three kinds of components are all powder materials, and the mass ratio of the three kinds of components is selected to be 5:13-16:3-6. According to the preparation method, an existing solid electrolyte artificial chemistry method is replaced, the preparation efficiency and the process stability are greatly improved, meanwhile, the chemical reagent poisoning risk in the preparation process is reduced, and an engineering foundation is laid for large-scale popularization and application of all-solid-state batteries.

Description

technical field [0001] The invention relates to a method for preparing a 3D printing filament of a solid electrolyte, and relates to a method for preparing a 3D printing filament of a lithium ion solid electrolyte. The prepared filament is used for the preparation of a lithium ion solid electrolyte. Background technique [0002] With the advancement of science and technology and the development of society, energy issues have become a key issue related to the sustainable development of the world. The huge pressure on energy and the environment makes finding and developing new green and renewable energy sources an urgent task for society. [0003] As a new type of battery structure, all-solid-state lithium battery has received a lot of attention in recent years. This type of battery not only has a high energy density, but also has excellent thermal stability, chemical stability and mechanical stability, and will not cause electrolyte leakage and other problems, and has high s...

Claims

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Application Information

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IPC IPC(8): B29C48/05B29C48/92B29C64/314B33Y40/00B33Y70/00H01M10/0565
CPCB33Y40/00B33Y70/00B29C64/314B29C48/05B29C48/92B29C2948/9259B29C2948/92704H01M10/0565Y02E60/10
Inventor 李庆棠朱鹏博
Owner BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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