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Lithium-rich antiperovskite oxide composite electrolyte and preparation method and application thereof

A composite electrolyte, anti-perovskite technology, used in solid electrolytes, non-aqueous electrolytes, non-aqueous electrolyte batteries, etc., can solve problems such as high stability, high ionic conductivity, and low interface impedance, and achieve good wettability, The effect of increasing the contact area and controllable conditions

Inactive Publication Date: 2019-05-21
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composite solid electrolytes prepared so far still cannot possess high ionic conductivity, wide electrochemical window, good mechanical properties, low interfacial impedance, high stability and other characteristics at the same time.

Method used

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  • Lithium-rich antiperovskite oxide composite electrolyte and preparation method and application thereof
  • Lithium-rich antiperovskite oxide composite electrolyte and preparation method and application thereof
  • Lithium-rich antiperovskite oxide composite electrolyte and preparation method and application thereof

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preparation example Construction

[0047] Correspondingly, an embodiment of the present invention provides a method for preparing an all-solid-state battery, including the following steps:

[0048] G01: Prepare lithium-rich anti-perovskite oxide composite electrolyte according to any of the above-mentioned preparation methods;

[0049] G02: heating and melting the lithium-rich anti-perovskite oxide composite electrolyte to obtain a lithium-rich anti-perovskite oxide composite electrolyte solution;

[0050] G03: Cast the lithium-rich anti-perovskite oxide composite electrolyte solution on the positive electrode sheet or the negative electrode sheet to form a composite electrolyte membrane;

[0051] G04: Paste oppositely arranged negative or positive electrode sheets on the composite electrolyte membrane, and cool to normal temperature to obtain a lithium-rich anti-perovskite battery.

[0052] Specifically, the entire process of the above-mentioned solution casting method is operated in an inert gas glove box. The operatio...

Embodiment 1

[0061] A method for preparing a lithium-rich anti-perovskite oxide composite electrolyte, the lithium-rich anti-perovskite oxide composite electrolyte is prepared by a solution casting method, and specifically includes the following steps:

[0062] The polymer (PCL), lithium salt (LiTFSI) and lithium-rich anti-perovskite oxide (Li 3 OCl 0.6 Br 0.4 ) Dissolve in the organic solvent acetonitrile according to the mass ratio of 6:2:2, stir the mixed solution to form a uniform solution, cast it on a polytetrafluoroethylene board and place it in a vacuum drying oven at 60°C for 12 hours. Form a composite electrolyte.

Embodiment 2

[0064] A method for preparing lithium-rich anti-perovskite oxide composite electrolyte, the lithium-rich anti-perovskite oxide composite electrolyte is prepared by a solution casting method, specifically including the following steps: polymer (PCL), lithium salt (LiFSI) ) And lithium-rich anti-perovskite oxide (Li 3 OBr) is dissolved in organic solvent succinonitrile according to the mass ratio of 5:1:1, the mixed solution is stirred to form a uniform solution, and it is cast on a polytetrafluoroethylene board and placed in a vacuum drying oven at 60°C for 20h Then, a composite electrolyte can be formed.

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Abstract

The invention provides a lithium-rich antiperovskite oxide composite electrolyte. The materials of the lithium-rich antiperovskite oxide composite electrolyte comprise a polymer, a lithium salt and afiller, and the filler is lithium-rich antiperovskite oxide; the structural formula of the lithium-rich antiperovskite oxide is Li3-xHxOA1-yBy, wherein A and B are halogen elements, x is not more than1 and not less than 0, and y is not more than 1 and not less than 0. By using the lithium-rich antiperovskite oxide electrolyte as the filler, the ionic conductivity and electrochemical window of thecomposite polymer electrolyte can be improved, the mechanical property of the composite electrolyte can be increased, the interface impedance between the electrolyte and the lithium-based negative pole can be reduced, and thus the acquired composite electrolyte has the relatively high lithium ion conductivity, good bending mechanical property, and relatively high interface stability.

Description

Technical field [0001] The invention relates to the field of new energy materials, in particular to a lithium-rich anti-perovskite oxide composite electrolyte and a preparation method thereof, an all-solid-state battery and a preparation method thereof. Background technique [0002] With the rapid development of electronics, information and new energy vehicles, new energy storage devices have become the focus of scientific and technological development, and the research and development of high-safety, large-capacity solid-state lithium-ion batteries has become the current research in the field of new energy materials Hot spot. With many advantages such as high energy density, safety, long service life, high working voltage, and environmental friendliness, solid-state lithium-ion batteries are playing an increasingly critical role in many fields. [0003] The solid electrolyte is the key material of the solid ion battery. The solid electrolyte is an ionic conductor, which generally...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/05
CPCH01M10/0525H01M10/0562H01M10/0565H01M2300/0068H01M2300/0082Y02E60/10
Inventor 邓永红池上森王庆荣韩兵冯东宇赵予生
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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