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Sulfide electrolyte material and preparation method and application thereof

A technology of sulfide electrolyte and solid electrolyte, which can be used in electrolyte immobilization/gelation, circuits, electrical components, etc., and can solve the problems of poor electrolyte stability, humidity sensitivity, and limited application.

Inactive Publication Date: 2021-09-07
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid electrolytes of sulfur compounds have poor stability, are sensitive to humidity, and can easily absorb water and react to produce toxic H 2 S gas, which greatly limits its application

Method used

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  • Sulfide electrolyte material and preparation method and application thereof
  • Sulfide electrolyte material and preparation method and application thereof

Examples

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preparation example Construction

[0047] One embodiment of the present invention provides a method for preparing a sulfide electrolyte material, comprising the following steps S10-S20:

[0048] Step S10: Provide raw materials according to the composition and ratio of the above-mentioned sulfide electrolyte materials; the raw materials include Li 6 P.S. 5 X1 or prepare Li 6 P.S. 5 The raw materials needed for X1 and AgX2 and B 2 o 3 ; When y=0, the raw material does not contain B 2 o 3 ;

[0049] Step S20: mixing and sintering the raw materials.

[0050] In some specific examples, in step S10, Li 6 P.S. 5 The raw materials required for X1 include Li X (X=Cl, Br, I), P 2 S 5 and Li 2 S.

[0051] In some specific examples, in step S20, Li X (X=Cl, Br, I), P 2 S 5 , Li 2 S and dopant are mixed and sintered.

[0052] It can be understood that the raw material Li can be provided 6 P.S. 5 X1 (X=Cl, Br, I), or Li X (X=Cl, Br, I), P 2 S 5 and Li 2 S first prepared the sulfur silver germanium ore t...

Embodiment 1

[0075] In a glove box filled with high-purity argon, LiCl, P 2 S 5 , Li 2 S according to the sulfur silver germanium type solid electrolyte material Li 6 P.S. 5 The stoichiometric ratio of Cl is weighed, and then according to the molar ratio Li 6 P.S. 5 Cl: Silver chloride = 1:0.1 Weigh the silver chloride, put them together into a ball mill with a rotation speed of 250rpm and mix them for 5 hours, then place them in a muffle furnace at 450°C for sintering for 24 hours. Since the raw material is sintered at 450 °C, the obtained sulfide electrolyte material is denoted as Li 6 P.S. 5 Cl 0.1 AgCl-450.

Embodiment 2

[0077] In a glove box filled with high-purity argon, LiCl, P 2 S 5 , Li 2 S according to the sulfur silver germanium type solid electrolyte material Li 6 P.S. 5 The stoichiometric ratio of Cl is weighed, and then according to the molar ratio Li 6 P.S. 5 Cl: silver chloride: boron oxide = 1:0.05:0.05 Weigh silver chloride and boron oxide, put them together in a ball mill with a rotation speed of 250rpm and mix them for 5h, then place them in a muffle furnace at 450°C for sintering for 24h; The sulfide electrolyte material is denoted as Li 6 P.S. 5 Cl 0.05AgCl 0.05B 2 o 3 -450.

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Abstract

The invention relates to a sulfide electrolyte material. The general formula of the sulfide electrolyte material is Li6PS5X1.xAgX2.yB2O3, wherein X1 is selected from one of chloride ions, bromide ions and iodide ions, and X2 is selected from one of chloride ions, bromide ions, fluoride ions, iodide ions and sulfate ions; 0 < x < = 0.5, and 0 < = y < = 0.5. By doping AgX2 in the argyrodite type sulfide electrolyte, the structural stability of the sulfide electrolyte material is improved; and boron oxide with a specific proportion is doped, so that the comprehensive performance of humidity stability and conductivity of the electrolyte material is improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a sulfide electrolyte material and its preparation method and application. Background technique [0002] A solid-state battery is a battery that uses solid electrodes and solid electrolytes. It is currently one of the best solutions that can simultaneously solve the safety hazards and low energy density of liquid lithium-ion batteries. In solid-state batteries, solid-state electrolyte materials can directly play the role of electrolyte and separator, so the key to the success of solid-state batteries lies in the preparation of suitable solid-state electrolyte materials. A suitable solid electrolyte material has high lithium ion conductivity at room temperature, and has the advantages of high mechanical strength, no flammable and corrosive components, no leakage problem, and good stability. [0003] Solid electrolytes are generally divided into the following three categories according to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0085Y02E60/10
Inventor 谢普梁世硕袁康文佳琪吴林斌
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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