Halogenated solid electrolyte material, flexible solid electrolyte membrane, lithium battery and preparation methods thereof

A solid electrolyte membrane and solid electrolyte technology, applied in the field of lithium ion batteries, can solve the problems of large thickness of solid electrolyte layer, unstable lithium metal, lack of flexibility, etc., and achieve good chemical/electrochemical stability, stable crystal structure, and production. low cost effect

Inactive Publication Date: 2021-01-12
BEIJING EASPRING MATERIAL TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a halogenated solid electrolyte material, a flexible solid electrolyte membrane, a lithium battery and its preparation in order to overcome the problems of the prior art, such as the thicker halide solid electrolyte layer, lack of flexibility, and instability with lithium metal. method

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  • Halogenated solid electrolyte material, flexible solid electrolyte membrane, lithium battery and preparation methods thereof
  • Halogenated solid electrolyte material, flexible solid electrolyte membrane, lithium battery and preparation methods thereof
  • Halogenated solid electrolyte material, flexible solid electrolyte membrane, lithium battery and preparation methods thereof

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[0048] The second aspect of the present invention provides a method for preparing a halogenated solid electrolyte material, comprising the following steps:

[0049] S1. Mixing and reacting the weighed raw materials to obtain a preliminary crystallization mixture;

[0050] S2. Under an inert atmosphere and / or a vacuum atmosphere, heat-treat and cool the primary crystallized mixture to obtain the halogenated solid electrolyte material;

[0051] Wherein, the raw material is at least one of halides, sulfates and silicates containing lithium, halides, sulfates and silicates containing M, and halides, sulfates and silicates containing M'; M is selected from group IIIB elements and / or group IIIA elements, and M' is selected from at least one of group IIA elements, group IB elements, group IIB elements, group IVB elements, group VIII elements and group VIII elements;

[0052] The consumption of described raw material makes the obtained halogenated solid electrolyte material have the ...

Embodiment 1

[0101] Step 1. Li 2.8 Y 0.8 Zr 0.2 Cl 5.4 Br 0.4 Preparation: Weigh YCl according to the stoichiometric ratio 3 , ZrCl 4 , LiBr and LiCl raw materials are placed in a ball mill tank, and ball milled with zirconia balls. The ratio of small balls to large balls is 1:1, the ratio of balls to materials is 2:1, and the rotation speed is 550rpm. After separation, it was placed in a corundum porcelain boat, calcined at 460°C for 12 hours in a tube furnace with a nitrogen atmosphere, and cooled with the furnace to obtain Li 2.8 Y 0.8 Zr 0.2 Cl 5.4 Br 0.4 .

[0102] Step 2, preparation of flexible halide electrolyte membrane: the Li obtained in step 1 2.8 Y 0.8 Zr 0.2 Cl 5.4 Br 0.4 , LiTFSI and PEO were uniformly mixed in a stirrer at a mass ratio of 8:1:1, and then the above mixture was laminated on a polyester film using a hot press to obtain a halide electrolyte membrane containing a substrate.

[0103] Step 3, preparation of membrane electrode: positive electrode ma...

Embodiment 2

[0108] Step 1. Li 3 InCl 3 Br 3 Preparation: Weigh InCl according to the stoichiometric ratio 3 , LiBr and LiCl raw materials are placed in a ball mill tank, and ball milled with zirconia balls, the ratio of small balls to large balls is 1:1, the ratio of balls to materials is 2:1, the speed is 500rpm, and the samples are taken out after ball milling for 6 hours, and the balls are sieved After separation, it was placed in a corundum porcelain boat, calcined at 580°C for 4 hours in a tube furnace with a nitrogen atmosphere, and cooled with the furnace to obtain Li 3 InCl 3 Br 3 .

[0109] Step 2, preparation of flexible halide electrolyte membrane: the Li obtained in step 1 3 InCl 3 Br 3 , LiTFSI, PMMA and PEO were uniformly mixed in a mixer at a mass ratio of 50:28:10:12, and then the above mixture was laminated on a polyester film using a hot press to obtain a halide electrolyte membrane containing a substrate.

[0110] Step 3, preparation of membrane electrode: posi...

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Abstract

The invention relates to the field of lithium ion batteries, and discloses a halogenated solid electrolyte material and a preparation method thereof, a flexible solid electrolyte membrane and a preparation method thereof, a lithium battery and a preparation method thereof. The halogenated solid electrolyte material has a composition shown as a formula I: Li[alpha]M[beta]M'[gamma]A [delta]A'[epsilon], wherein in the formula I, M is selected from a group IIIB element and/or a group IIIA element, and M' is selected from at least one of a group IIA element, a group IB element, a group IIB element,a group IVB element, a group VIII element and a group VIII element; wherein A is selected from at least one of F-, Cl-, Br- and I-; wherein A' is selected from SO4<2> and/or SiO3<2->, 1 < = alpha < =3, 0 < = beta < = 1, 0 < = gamma < = 2, 0 < delta < = 6, and 0 < = epsilon < = 1. The halide solid-state electrolyte solid-state lithium battery prepared based on the solvent-free method has relatively high specific capacity and cycling stability.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a halogenated solid electrolyte material, a flexible solid electrolyte membrane, a lithium battery and a preparation method thereof. Background technique [0002] At present, consumer electronics and electric vehicles have higher requirements for the safety, high energy density, power density and cycle life of lithium-ion batteries. Traditional lithium-ion batteries use a flammable electrolyte system, which has high reactivity and poor stability with high-energy electrode materials such as strong reducing metal lithium and high-oxidizing positive electrodes (especially in the charged state), and there are great potential safety hazards. It is not conducive to further improving the energy density of the battery. After replacing the electrolyte with a solid electrolyte, solid-state lithium batteries have high safety and high energy density in theory, and have become a research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058H01M10/0525C01B9/00C01B17/45C01B33/08C01F5/00C01G15/00C01G25/00
CPCC01B9/00C01B17/45C01B33/08C01F5/00C01G15/006C01G25/006C01P2002/72C01P2006/40H01M10/0525H01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 贺子建刘亚飞陈彦彬
Owner BEIJING EASPRING MATERIAL TECH CO LTD
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