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Self-repairing polymer electrolyte matrix and preparation method thereof, self-repairing polymer electrolyte, lithium ion battery and application thereof

A self-healing, polymer technology, applied in the direction of electrolytes, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems of low energy density of energy storage devices, limited operating voltage window range of aqueous polymer electrolytes, etc.

Active Publication Date: 2019-04-19
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has good self-healing performance, the working voltage window range of aqueous polymer electrolyte is limited (less than 2V), resulting in low energy density of energy storage devices.

Method used

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  • Self-repairing polymer electrolyte matrix and preparation method thereof, self-repairing polymer electrolyte, lithium ion battery and application thereof
  • Self-repairing polymer electrolyte matrix and preparation method thereof, self-repairing polymer electrolyte, lithium ion battery and application thereof
  • Self-repairing polymer electrolyte matrix and preparation method thereof, self-repairing polymer electrolyte, lithium ion battery and application thereof

Examples

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preparation example Construction

[0113] According to a second aspect of the present invention, there is provided a method for preparing the above-mentioned self-healing polymer electrolyte matrix, comprising the following steps:

[0114] Inorganic nano-additives and other polymers are grafted on the self-healing polyurethane to obtain a self-healing polymer electrolyte matrix.

[0115] A self-healing polymer electrolyte matrix can be prepared by grafting inorganic nano-additives and other polymers on self-healing polyurethane. The preparation method is simple.

[0116] In one embodiment, the preparation method of self-healing polymer electrolyte matrix comprises the following steps:

[0117] (a) dissolving the inorganic nano-additive in the organic solvent, then adding diisocyanate, and obtaining the modified inorganic nano-additive after the reaction;

[0118] (b) in the solution that step (a) obtains, add bishydroxyl compound, obtain the polyurethane grafted with inorganic nano-additive after reaction;

...

Embodiment 1

[0149] 1. Self-healing polymer electrolyte matrix

[0150] A self-healing polymer electrolyte matrix consisting of graphene oxide (500nm-2μm in size), self-healing polyurethane and PVDF-HFP (Aldrich, M w ~455000, M n ~110000); graphene oxide and PVDF-HFP are grafted on the self-healing polyurethane, and the self-healing polyurethane is a furan-maleimide structural self-healing polyurethane.

[0151] 2. Preparation of self-healing polymer electrolyte matrix

[0152] The preparation method of the self-healing polymer electrolyte matrix comprises the following steps:

[0153] (a) Dissolve 20mg of graphene oxide in 50mL of DMF (N,N-dimethylformamide), then add 2.0g of 4,4'-methylene bis(phenylisocyanate), 80°C Next N 2 The protection reaction was carried out for 2 hours to obtain the modified inorganic nano-additive.

[0154] (b) in the solution that step (a) obtains, add the polytetrahydrofuran glycol (PTMEG2000) of 8.0g, by constant pressure dropping funnel in N 2 Add drop...

Embodiment 2-5

[0163] The only difference between Examples 2-5 and Example 1 is that the types of furan derivatives are different, as shown in Table 1.

[0164] Table 1 Types of furan derivatives

[0165] Example

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Abstract

The invention provides a self-repairing polymer electrolyte matrix and a preparation method thereof, a self-repairing polymer electrolyte, a lithium ion battery and an application thereof, which belong to the technical field of self-repairing polymer electrolytes. The invention provides the self-repairing polymer electrolyte. The self-repairing polymer electrolyte matrix comprises an inorganic nano-additive, self-repairing polyurethane and other polymers, wherein the inorganic nano-additive and the other polymers are grafted on the self-repairing polyurethane; and the self-repairing polyurethane is obtained by a Diels- Alder reaction. The reversible action of a furan-maleimide structure in the self-repairing polyurethane endows the self-repairing polymer electrolyte matrix with good self-repairing ability; the polymer electrolyte endows the self-repairing polymer electrolyte matrix with good ionic conductivity; the inorganic nano-additive provides active sites, so that the polymers areprone to form a three-dimensional crosslinked structure, therebt further improving the ionic conductivity.

Description

technical field [0001] The invention belongs to the technical field of self-repairing polymer electrolytes, and specifically relates to a self-repairing polymer electrolyte matrix and a preparation method thereof, a self-repairing polymer electrolyte, a lithium ion battery and applications thereof. Background technique [0002] Due to the advantages of high energy density, small size and long life, lithium-ion batteries have broad application prospects as energy storage devices in portable electronic devices, electric vehicles and other fields. With the rapid development of wearable electronic devices, the research and development of lithium-ion batteries with good flexibility has become a hot spot of concern. Due to the complexity of the use environment, people put forward higher requirements for the safety and reliability of flexible lithium-ion batteries, because in practical applications, it is inevitable to encounter various external force stimuli and physical damage, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0042H01M2300/0091Y02E60/10
Inventor 唐永炳张帆王勇
Owner SHENZHEN INST OF ADVANCED TECH
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