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A kind of lithium ion battery solid electrolyte and preparation method thereof

A solid electrolyte and lithium-ion battery technology, applied in the field of lithium-ion batteries, can solve problems that hinder the practical application of all-solid-state batteries and unstable electrochemical properties, and achieve excellent lithium ion conductivity, good lithium ion conductivity, and ultra-fast Effect of lithium ion conductivity

Active Publication Date: 2019-05-14
ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical properties of this material are unstable when in contact with metallic Li, which hinders its practical application in all-solid-state battery technology.

Method used

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  • A kind of lithium ion battery solid electrolyte and preparation method thereof
  • A kind of lithium ion battery solid electrolyte and preparation method thereof
  • A kind of lithium ion battery solid electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The solid electrolyte of the lithium ion battery of this embodiment has a chemical composition of Li 6 PS 5 I, see the structure figure 1 .

[0037] The preparation method of the solid electrolyte of the lithium ion battery of this embodiment includes the following steps:

[0038] 1) Dry the sulfur powder and phosphor powder in a vacuum drying box for 24 hours; under the protection of argon atmosphere in the glove box, follow the steps of lithium hydride (LiH), phosphor powder (P), sulfur powder (S), and iodine particles (I) The molar ratio is 6:1:5:1. Take the above-mentioned substances evenly and mix them and put them into a ball milling jar. Put 15 zirconia ball milling balls with a diameter of 10mm into the jar and tightly seal;

[0039] 2) Take the ball mill jar out of the glove box and put it into the omni-directional planetary ball mill for ball milling; set the ball mill speed to 350 rpm, the ball mill will grind for 20 minutes per mill, and let stand and cool for 5 m...

Embodiment 2

[0042] The solid electrolyte of the lithium ion battery of this embodiment has a chemical composition of Li 6 PS 4 TeCl.

[0043] The preparation method of the solid electrolyte of the lithium ion battery of this embodiment includes the following steps:

[0044] 1) Dry sulfur powder, phosphor powder, and lithium chloride powder in a vacuum drying box for 24 hours; under the protection of argon atmosphere in a glove box, follow the steps of lithium hydride (LiH), phosphor powder (P), sulfur powder (S), The molar ratio of tellurium powder (Te) and lithium chloride (LiCl) powder is 5:1:4:1:1 and then uniformly mixed and put into the ball milling tank, and 15 zirconia ball milling balls with a diameter of 10mm are put into the tank , Tightly sealed;

[0045] 2) Take the ball mill jar out of the glove box and put it into the omni-directional planetary ball mill for ball milling; set the ball mill speed to 300 rpm, the ball mill will grind for 20 minutes per mill, and let stand and cool f...

Embodiment 3

[0048] The solid electrolyte of the lithium ion battery of this embodiment has a chemical composition of Li 6 PTe 5 Cl.

[0049] The preparation method of the solid electrolyte of the lithium ion battery of this embodiment includes the following steps:

[0050] 1) Dry the sulfur powder, phosphorus powder, and lithium chloride powder in a vacuum drying box for 24 hours; under the protection of argon atmosphere in a glove box, follow the steps of lithium hydride (LiH), phosphorus powder (P), tellurium powder (Te), The lithium chloride (LiCl) powder has a molar ratio of 5:1:5:1 and is uniformly mixed and then put into a ball milling jar. 15 zirconia ball milling balls with a diameter of 10mm are put into the jar and sealed tightly;

[0051] 2) Take the ball mill jar out of the glove box and put it into the omni-directional planetary ball mill for ball milling; set the ball mill speed to 300 rpm, the ball mill will grind for 20 minutes per mill, and let stand and cool for 5 minutes. The ...

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Abstract

The invention relates to a lithium-ion battery solid electrolyte and a preparation method thereof, belonging to the technical field of lithium-ion batteries. Lithium-ion battery solid electrolyte of the present invention, chemical composition is Li 6+ a P.S. 5‑n+b‑k A n x 1‑b , n is 0-5, a is 0-0.5, b is 0-0.5, k is 0-0.5; wherein A is at least one of O, S, Se or Te elements, and X is at least one of halogen elements kind. The lithium ion battery solid electrolyte of the invention has excellent lithium ion conductivity and stable thermodynamic performance. with Li 10 GeP 2 S 12 Compared with the solid electrolyte, the lithium ion battery solid electrolyte of the present invention has three-dimensional equivalent ultrafast ion transport capability, lower diffusion activation energy, and better lithium ion conductivity.

Description

Technical field [0001] The invention relates to a lithium ion battery solid electrolyte and a preparation method thereof, and belongs to the technical field of lithium ion batteries. Background technique [0002] Using all-solid electrolytes to replace liquid organic electrolytes is expected to fundamentally solve the flammable safety hazards of today's lithium batteries, and overcome the problem of lithium dendrites formed between the electrolyte and the metal lithium electrode interface. However, the ionic conductivity of the liquid electrolyte is used as the standard (the lithium ion conductivity is greater than 1mScm -1 ), the rapid transport of Li ions in solid electrolytes is still extremely challenging. [0003] Types and important parameters of traditional oxide solid electrolytes, lithium titanium phosphate type Li 1.3 M 0.3 Ti 1.7 (PO 4 ) 3 (M is Al or Sc) solid electrolyte, the maximum lithium ion conductivity at 298K is 0.7mScm -1 . Garnet type Li 7 La 3 Zr 2 O 12 ,Lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/058
CPCH01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 邵国胜王卓
Owner ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD