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A kind of preparation method of composite solid electrolyte and its products

A solid electrolyte and electrolyte technology, applied in solid electrolyte, non-aqueous electrolyte, circuit, etc., can solve the problems of unsatisfactory room temperature conductivity and no ability to transmit lithium ions, so as to improve mechanical strength and ion conductivity, and solve the problem of lithium branch Crystal growth and the effect of reducing crystallinity

Active Publication Date: 2022-04-01
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these nanoparticles are easy to agglomerate and do not have the ability to transport lithium ions, so the room temperature conductivity is still not ideal.

Method used

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  • A kind of preparation method of composite solid electrolyte and its products
  • A kind of preparation method of composite solid electrolyte and its products
  • A kind of preparation method of composite solid electrolyte and its products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a composite solid electrolyte, comprising the following steps:

[0028] S1, H 3 PW 12 o 40 Preparation of nanocrystals: 1 kg of Na 2 WO 4 2H 2 O was dissolved in 1 L of deionized water, heated to boiling until the solution was clear, and then 100 mL of 85% H 3 PO 4 , then slowly add 800mL of concentrated hydrochloric acid to the solution, and then add 600mL of anhydrous ether to the solution to continue mixing after the solution is cooled, shake well, so that the mixed solution is divided into three layers, and then the bottom solution is transferred out, And wash the remaining solution with water several times; finally make it heated and evaporated to obtain, H 3 PW12 o 40 nanocrystals;

[0029] S2, the H 3 PW 12 o 40 Nanocrystals and m-aminophenol were added to a zirconia ball mill jar at a mass ratio of 5:1, milled for 20 minutes, and then an appropriate amount of citric acid and nonionic tri-block copolymer F127 was added to contin...

Embodiment 2

[0035] The difference from Example 1 is that mesoporous H 3 PW 12 o 40 The mass ratio of nanocrystals to PEO-based polymer electrolyte is the mesoporous H of this embodiment 3 PW 12 o 40 The mass of nanocrystals added is 34.05g (20wt%).

[0036] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0038] The difference from Example 1 is that mesoporous H 3 PW 12 o 40 The mass ratio of nanocrystals to PEO-based polymer electrolyte is the mesoporous H of this embodiment 3 PW 12 o 40 The mass of nanocrystals added is 58.37g (30wt%).

[0039] The rest are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a method for preparing a composite solid electrolyte, comprising the following steps: S1, adding H 3 PW 12 o 40 Nano crystals and m-aminophenol are mixed according to mass ratio (3~7): 1, ball milled, then add citric acid and nonionic tri-block copolymer F127 and continue ball milling to obtain gel mixture; S2, gel mixture Calcined to obtain mesoporous H 3 PW 12 o 40 Nanocrystal; S3, the mesoporous H 3 PW 12 o 40 The nanocrystals are mixed with the PEO-based polymer electrolyte to form a composite glue, which is then dried to obtain a composite solid electrolyte. Compared with the prior art, the inorganic mesoporous nanocrystals used in the present invention not only effectively reduce the crystallinity of the PEO-based polymer electrolyte, but also provide more channels for the transmission of lithium ions, and it is not easy for the agglomeration of nanoparticles to occur. The problem of poor mechanical strength and ionic conductivity of the current polymer solid electrolyte is solved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a method for preparing a composite solid electrolyte and a product thereof. Background technique [0002] Due to its high energy and power density, rechargeable lithium-ion batteries have become an important part of energy systems and have attracted widespread attention. They are widely used in electric vehicles and hybrid electric vehicles, as well as digital electronic products. However, due to the lack of safety performance of lithium-ion batteries, it has brought panic to consumers and limited the large-scale application of lithium-ion batteries. Therefore, it is imperative to develop lithium-ion batteries with high safety performance. [0003] Solid electrolytes are non-toxic, non-leakage, and non-flammable, so replacing liquid electrolytes with solid electrolytes provides an effective solution to safety issues. Solid electrolytes, including inorganic ceramic electrolytes,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/0565H01M10/0525
CPCH01M10/0562H01M10/0565H01M10/0525H01M2300/0068H01M2300/0082Y02E60/10
Inventor 朱福龙张凯马斌杨山陈杰李载波
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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