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High-entropy inorganic electrolyte material, composite electrolyte material and preparation method thereof

A technology of inorganic electrolytes and composite electrolytes, applied in the field of composite electrolyte materials and their preparation, and high-entropy inorganic electrolyte materials, which can solve the problems of low conductivity of electrolyte materials

Active Publication Date: 2021-07-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve or improve the technical problem of low conductivity of electrolyte materials, the present invention provides a high-entropy inorganic electrolyte material with a chemical formula of A x D. 1-x E, wherein, 0<x<1, A is selected from at least one metal element in IA and / or IIA, and D is selected from at least five of IIIB, IVB, VB, VIB, VIIB, VIII, IB or IIB groups Metal element, E is selected from at least one element in VIA or VIIA

Method used

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  • High-entropy inorganic electrolyte material, composite electrolyte material and preparation method thereof
  • High-entropy inorganic electrolyte material, composite electrolyte material and preparation method thereof
  • High-entropy inorganic electrolyte material, composite electrolyte material and preparation method thereof

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Embodiment 1

[0040] This embodiment is to prepare a kind of high entropy inorganic electrolyte material Li 0.5 (Mg 0.2 co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 ) 0.5 O, x =0.5 as an example to illustrate the preparation method of direct sintering to prepare high-entropy solid electrolyte materials, the preparation steps include:

[0041] (1) Ingredients step: According to the molar ratio Li:Mg:Co:Ni:Cu:Zn = 5:1:1:1:1:1, weigh the raw materials lithium carbonate, magnesium oxide, cobaltous oxide, nickelous oxide, Copper oxide, zinc oxide, (in this embodiment, the raw material lithium carbonate can also be replaced by lithium oxide);

[0042] (2) Grinding step: Put the above-mentioned raw materials into a planetary ball mill for ball milling and mixing, wherein the mass ratio of balls to materials is 20:1, the ball milling speed is 600rpm, and the ball milling time is 1h;

[0043] (3) Pressing step: press the ball-milled mixed raw material into a block under a pressure of 300 MPa with a mold.

...

Embodiment 2

[0048] This example provides another method for preparing a high-entropy inorganic electrolyte material, which is similar to Example 1, except that in the batching step: according to the molar ratio Li:Mg:Co:Ni:Cu:Zn=(5~15 ):1:1:1:1:1, weigh the raw materials lithium oxide, magnesium oxide, cobaltous oxide, nickelous oxide, copper oxide, zinc oxide. By adding an excessive amount of lithium oxide, the maximum doping of metal lithium element in the high-entropy metal oxide can be realized.

[0049] In a specific embodiment, the raw materials are weighed according to the molar ratio Li:Mg:Co:Ni:Cu:Zn=10:1:1:1:1:1.

Embodiment 3

[0051] This embodiment provides another preparation method of high-entropy inorganic electrolyte material, Na x (Mg 0.2 co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 ) 1-x O, x =0.5, similar to Example 1, the difference is that A is metal sodium, and the raw material containing A is sodium carbonate.

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Abstract

The invention discloses a high-entropy inorganic electrolyte material, a composite electrolyte material and a preparation method thereof. The invention also comprises a battery containing the high-entropy inorganic electrolyte material, the chemical formula of the high-entropy inorganic electrolyte material is AxD1-xE, x is more than 0 and less than 1, A is at least one metal element selected from IA and / or IIA, D is selected from at least five metal elements in groups IIIB, IVB, VB, VIB, VIIB, VIII, IB or IIB, and E is selected from at least one element in VIA or VIIA; ions of the metal element A can serve as an ion conduction medium in the battery and are used for providing A ion conduction, D contains more than five metal atoms, due to the fact that the atomic sizes of different metal elements are different, lattice distortion is generated in the crystal structure of the material, and the electronic structure of the material is influenced, and a high entropy effect is generated to result in change of ionic conductivity. In the field of batteries, especially the field of solid-state batteries, the material has a huge commercial practical value.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a high-entropy inorganic electrolyte material, a composite electrolyte material and a preparation method thereof. Background technique [0002] All-solid-state lithium-ion batteries have very good application prospects in the field of high-safety chemical power sources due to their high safety, long cycle life, and high energy density. Solid electrolyte materials are the core of all-solid-state lithium batteries. So far, many lithium-ion solid electrolyte systems have been studied, mainly including oxide-type solid electrolytes, sulfide-type solid electrolytes, polymer-based solid electrolytes, and inorganic-organic composite electrolytes. Sulfide solid-state electrolytes are mainly divided into binary and ternary solid-state electrolytes, GeS 2 、SiS 2 ,P 2 S 5 Base and other binary sulfide electrolytes generally have problems such as low conductivity, poor electrochemical st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/056H01M10/058
CPCH01M10/0562H01M10/056H01M10/058H01M2300/0068H01M2300/0082H01M2300/0091Y02P70/50Y02E60/10
Inventor 杨树斌李明生
Owner BEIHANG UNIV