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Solid-state electrolyte material and preparation method thereof, solid-state electrolyte sheet and all-solid-state battery

A solid-state electrolyte and solid-state battery technology, applied in the direction of solid electrolyte, electrolyte, composite electrolyte, etc., can solve the problem of low ion conductivity

Active Publication Date: 2021-11-23
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low ionic conductivity of antiperovskite solid electrolytes due to grain boundary impedance between grains of antiperovskite solid electrolytes

Method used

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  • Solid-state electrolyte material and preparation method thereof, solid-state electrolyte sheet and all-solid-state battery
  • Solid-state electrolyte material and preparation method thereof, solid-state electrolyte sheet and all-solid-state battery
  • Solid-state electrolyte material and preparation method thereof, solid-state electrolyte sheet and all-solid-state battery

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preparation example Construction

[0032] The application provides a method for preparing a solid electrolyte material, comprising: heating the anti-perovskite material to melt the anti-perovskite material to obtain a molten liquid, keeping the molten liquid in a first temperature range and contacting the metal with electronic insulation Organic framework compounds (English name metal organic frameworks; MOFs for short) are mixed, and the molten liquid is cooled and solidified. Wherein, the first temperature is greater than or equal to the melting temperature of the antiperovskite material, and lower than the destruction temperature of the metal organic framework compound.

[0033] MOFs have channels, which are porous materials. Limiting the first temperature within the above range can melt the antiperovskite material without destroying the structure of MOFs (the first temperature is lower than the destruction temperature of MOFs and can maintain the original structure of MOFs). Since the perovskite material i...

Embodiment 1

[0062] A method for preparing a solid electrolyte sheet, comprising the steps of:

[0063] (1), under the protection of an inert gas, 3% mass ratio of ZIF-67 (a nitrogen-containing ligand-type MOFs) powder and 97% mass ratio of Li 2 The OHF inverse perovskite powder is mixed uniformly to obtain a mixed powder.

[0064] (2), place the mixed powder in step (1) in a container, heat the container to 300°C, and mix the Li in the powder 2 The OHF powder was melted to obtain a molten liquid, and the molten liquid was kept at 300° C. for 40 minutes, and the molten liquid was cooled to room temperature to obtain a mixture.

[0065] (3) Grinding the mixture obtained in step (2) into powder, pressing the powder into a sheet-like structure to obtain a solid electrolyte precursor, and then sintering at 200°C for 24 hours, cooling to room temperature to obtain a solid electrolyte sheet.

Embodiment 2

[0067] A method for preparing a solid electrolyte sheet, comprising the steps of:

[0068] (1), under the protection of inert gas, 5% mass ratio of UiO-66 (a kind of carboxylic acid ligand type MOFs) powder and 95% mass ratio of Li 2 The OHF inverse perovskite powder is mixed uniformly to obtain a mixed powder.

[0069] (2), place the mixed powder in step (1) in a container, heat the container to 300°C, and mix the Li in the powder 2 The OHF powder was melted to obtain a molten liquid, and the molten liquid was kept at 300° C. for 40 minutes, and the molten liquid was cooled to room temperature to obtain a mixture.

[0070] (3) Grinding the mixture obtained in step (2) into powder, pressing the powder into a sheet-like structure to obtain a solid electrolyte precursor, and then sintering at 200°C for 24 hours, cooling to room temperature to obtain a solid electrolyte sheet.

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Abstract

The application provides a solid electrolyte material and a preparation method thereof, a solid electrolyte sheet and an all-solid battery, which belong to the technical field of secondary batteries. Solid-state electrolyte materials include: electronically insulating metal-organic framework compounds and antiperovskite layers. Metal-organic framework compounds have pores. The antiperovskite layer covers at least part of the surface of the framework structure of the metal-organic framework compound, and at least part of the pore walls of the channel. The solid electrolyte prepared by the solid electrolyte material has small grain resistance and high ion conductivity.

Description

technical field [0001] The present application relates to the technical field of secondary batteries, in particular, to a solid electrolyte material and a preparation method thereof, a solid electrolyte sheet and an all-solid battery. Background technique [0002] In the prior art, for the all-solid-state battery of the anti-perovskite system, a single anti-perovskite powder is usually used as the material of the solid-state electrolyte to prepare the solid-state electrolyte. The ionic conductivity of antiperovskite solid electrolytes is low due to the grain boundary impedance between the grains of antiperovskite solid electrolytes. Contents of the invention [0003] The purpose of the present application is to provide a solid electrolyte material and its preparation method, a solid electrolyte sheet and an all-solid battery. The solid electrolyte prepared from the solid electrolyte material has small grain resistance and high ion conductivity. [0004] In a first aspect,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/054
CPCH01M10/0525H01M10/054H01M10/0565H01M2300/0065H01M2300/0088H01M2300/0094Y02E60/10
Inventor 高磊赵若李帅邹如强赵予生
Owner PEKING UNIV