Solid electrolyte with self-supporting structure, preparation method and application

A technology of solid electrolyte and self-supporting structure, which is applied in the direction of solid electrolyte, non-aqueous electrolyte, non-aqueous electrolyte battery, etc., can solve the problems of being thick and brittle, unable to meet the requirements of forming thin flexible films, and poor interface contact, etc. The process method is simple, the effect of ensuring ionic conductivity and uniform product quality

Inactive Publication Date: 2020-11-06
SIDUS ENERGY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ceramic-type solid electrolytes have poor interfacial contact with electrodes and are usually thick and brittle, which cannot meet the requirements of being molded into thin and flexible films for practical applications.

Method used

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  • Solid electrolyte with self-supporting structure, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment discloses a solid electrolyte with a self-supporting structure, its preparation method and application. The preparation method of the solid electrolyte in this embodiment includes the following steps:

[0041] Step 1, preparing active ceramic powder-binder flexible body;

[0042] According to active ceramic powder Li 7 La 3 Zr 2 o 12 The stoichiometric ratio of raw materials LiOH, La(OH) 3 , ZrO 2 , add 10% more LiOH to make up for the lithium loss during the synthesis.

[0043] The raw material was ball milled for 12 h, then heated at 950° C. for 14 h.

[0044] After cooling, ball mill for 12h.

[0045] Get active ceramic powder Li 7 La 3 Zr 2 o 12 .

[0046] The active ceramic powder and the binder PVDF were mixed according to a mass ratio of 95:5, and ball milled for 60 minutes to obtain the active ceramic powder-binder flexible body;

[0047] Step 2. Place the 80-mesh nylon mesh in the middle of the active ceramic powder-binder flexible ...

Embodiment 2

[0054] This embodiment discloses a solid electrolyte with a self-supporting structure, its preparation method and application. The preparation method of the solid electrolyte in this embodiment includes the following steps:

[0055] Step 1, preparing active ceramic powder-binder flexible body;

[0056] According to active ceramic powder Li 6.75 La 3 Zr 1.75 Ta 0.25 o 12 The stoichiometric ratio of raw materials LiOH, La(OH) 3 , ZrO 2 、 Ta 2 o 5 , add 10% more LiOH to make up for the lithium loss during the synthesis.

[0057] The raw material was ball milled for 12 hours, and then heated at 900° C. for 12 hours.

[0058] After cooling, ball mill for 12h.

[0059] Get active ceramic powder Li 6.75 La 3 Zr 1.75 Ta 0.25 o 12 .

[0060] The above-mentioned active ceramic powder and binder PTFE were mixed according to the mass ratio of 94:6, and ball milled for 40 minutes to obtain the active ceramic powder-binder flexible body.

[0061] Step 2: Place a 100-mesh ny...

Embodiment 3

[0068] This embodiment discloses a solid electrolyte with a self-supporting structure, its preparation method and application. The preparation method of the solid electrolyte in this embodiment includes the following steps:

[0069] Step 1, preparing active ceramic powder-binder flexible body;

[0070] According to active ceramic powder Li 0.35 La 0.55 TiO 3 The stoichiometric ratio of raw materials LiOH, La(OH) 3 、TiO 2 , add 10% more LiOH to make up for the lithium loss during the synthesis.

[0071] The raw material was ball milled for 12 h, then heated at 1050° C. for 14 h.

[0072] After cooling, ball mill for 12h.

[0073] Get active ceramic powder Li 0.35 La 0.55 TiO 3 .

[0074] The above active ceramic powder and binder PVDF were mixed according to a mass ratio of 97:3, and ball milled for 40 minutes to obtain an active ceramic powder-binder flexible body.

[0075] Step 2: Place a 100-mesh nylon mesh in the middle of the active ceramic powder-binder flexibl...

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Abstract

The invention discloses a solid electrolyte with a self-supporting structure. The solid electrolyte comprises a framework material and active ceramic powder adhered to the framework material through an adhesive, and the surface of the framework material loaded with the active ceramic powder is uniformly covered with uniformly mixed succinonitrile and lithium bis(trifluoromethyl) sulfonimide. The invention also discloses a preparation method and application of the solid electrolyte. The solid electrolyte not only has good mechanical properties and interface contact, but also has high ionic conductivity and a wide electrochemical window; and the cycle performance of an all-solid-state lithium ion battery prepared by the method is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to a solid electrolyte with a self-supporting structure, a preparation method and an application. Background technique [0002] All-solid-state electrolytes, including ceramic electrolytes and polymer electrolytes, have attracted extensive attention due to their high safety and suitability for high-energy-density lithium metal batteries. [0003] For polymer electrolytes, although they have good mechanical flexibility, are in close contact with electrodes, and are easy to prepare thin films, their low ionic conductivity, poor electrochemical stability, and poor flame retardancy at room temperature severely limit their use. practical application. [0004] Ceramic electrolytes, due to their nonflammability, high ionic conductivity, wide electrochemical window, and good chemical stability to lithium ions, have great application potential in high-safety metal lithium bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/052
CPCH01M10/052H01M10/056H01M2300/0065Y02E60/10
Inventor 易祖良李炳江王立群孙晓玉郑浪刘奕凯叶鑫
Owner SIDUS ENERGY TECH LTD
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