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A kind of solid polymer electrolyte containing titanium oxygen cluster, preparation method and application

A solid polymer, polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, batteries, etc., can solve the problems of nanoparticle size, shape non-uniformity, battery performance uncertainty, etc.

Active Publication Date: 2021-06-04
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional non-polar oxide nanoparticles are often inhomogeneous in size and shape, which brings uncertainty to the optimization of battery performance

Method used

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  • A kind of solid polymer electrolyte containing titanium oxygen cluster, preparation method and application
  • A kind of solid polymer electrolyte containing titanium oxygen cluster, preparation method and application
  • A kind of solid polymer electrolyte containing titanium oxygen cluster, preparation method and application

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preparation example Construction

[0047] The preparation method of the above solid polymer electrolyte, the steps are as follows:

[0048] A. Add dehydrated glycerol to the dichloromethane solution of CTOC, react at room temperature, and the adverse solvent of CTOC is added such as diethyl ether, and the intermediate product CTOC-PEO is obtained.

[0049] B. The intermediate product CTOC-PEO is dissolved in N, N-dimethylformamide solvent, and the end group is an amino group polyethylene glycol NH. 2 -PEG-NH 2 The reaction was prepolymerized at 50 ° C for 2 to 3 hours to obtain a viscous prepolymer;

[0050] C. Apply the prepolymer to a flat glass substrate to heat the reaction in a vacuum drying tank for 5 to 8 hours to obtain a solid solid polymer diaphragm.

[0051] D. Cut the solid-state polymer diaphragm is circular, soaked in a lithium ion electrolyte 12 to 24 hours to obtain a solid polymer electrolyte.

[0052] Preferably, the step of separating the purification in step A is: EtOAc (EtOAc) EtOAc.

[0053] P...

Embodiment 1

[0063] The synthetic route of the synthesized solid polymer electrolyte synthesized by the present invention is as follows:

[0064] 1, CTOC-1-PEO preparation:

[0065] CTOC-1 (200 mg, 36 mmol) was dissolved in 5 mL of dichloromethane, concentration of 40 mg ml -1 3 ml of dehydrated glycerol, shake uniform, and allowed to react for 12 hours. 60 mL of diethyl ether was added to the system, there will be a large amount of white precipitation, and the deposition is not increased, centrifuged, washed twice with tetrahydrofuran, and dry the white intermediate CTOC-1-PEO.

[0066] 2, preparation of the prepolymer

[0067] The intermediate product CTOC-1-PEO (50 mg) is dissolved in N, N-dimethylformamide (5 mL), and the end group is an amino group polyethylene glycol NH. 2 -PEG-NH 2 (Molecular Weight: 1000d, 130 mg), at 50 ° C, prepolymerized 2.5 hours, resulting in viscous prepolymer CTOC-1-PEO-PEG.

[0068] 3, preparation of solid polymer diaphragm

[0069] The viscous prepolymer CTOC-...

Embodiment 2

[0073] 1, CTOC-2-PEO preparation:

[0074] CTOC-2 (200 mg, 32 mmol) was dissolved in 5 ml of dichloromethane, concentration of 40 mg ml -1 3 ml of dehydrated glycerol, shake uniform, and allowed to react for 12 hours. 60 mL of diethyl ether was added to the system, there will be a large amount of white precipitation, and the deposition is not increased, centrifugally separated, washed twice with tetrahydrofuran, vacuum drying. CTOC-2-PEO.

[0075] 2, preparation of the prepolymer

[0076] The intermediate product CTOC-2-PEO (50 mg) is dissolved in N, N-dimethylformamide (5 mL), and the end group is an amino group polyethylene glycol NH. 2 -PEG-NH 2 (Molecular Weight: 1000D, 130 mg), at 50 ° C, prepolymerization of 2.5 hours, resulting in viscous prepolymer CTOC-2-PEO-PEG.

[0077] 3, preparation of solid polymer diaphragm

[0078] The viscous prepolymer CTOC-2-PEO-PEG was applied to a flat glass substrate, placed in a vacuum drying tank and continued to react for 6 hours, cooled t...

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Abstract

The present invention relates to a kind of solid polymer electrolyte containing titania cluster, preparation method and application, especially the application in lithium battery, and its structural general formula is [(CTOC)(PEO) 16 ] m (NH‑PEG‑NH) n , where m and n are non-zero integers. The preparation method is as follows: A, adding dehydrated glycerin to the dichloromethane solution of titanium oxide clusters, adding a poor solvent after the reaction, to obtain CTOC-PEO; B, dissolving CTOC-PEO in N,N-dimethylformamide solvent, Join NH 2 ‑PEG‑NH 2 , react at 50°C to obtain a viscous prepolymer; C, apply the prepolymer on a flat glass substrate, heat and react in a vacuum oven for 5 to 8 hours, and obtain a solid polymer diaphragm with better quality; D, The solid polymer separator is soaked in the lithium ion electrolyte to obtain the solid polymer electrolyte. The above-mentioned solid polymer electrolyte containing titanium oxygen clusters can be applied to lithium-sulfur batteries, completely replace commercial polymer separators and electrolytes, assemble solid-state lithium-sulfur batteries, and show good performance. The invention is expected to be applied to safe and reliable solid-state lithium batteries and other aspects.

Description

Technical field [0001] The present invention belongs to the field of solid-state polymer electrolyte preparation, and more particularly to a polymer electrolyte, preparation method of a titanium oxygen group cluster, and an application in a lithium battery. Background technique [0002] The information disclosed in the background is only intended to increase the understanding of the overall background of the present invention, and is not necessarily considered to recognize or imply that the information is intended to be a prior art known to those of ordinary skill in the art. [0003] With the successful research and development of high-energy density lithium batteries, new energy vehicles have been put into production in some auto companies, such as BYD, and walk into thousands of households. In 2019, the Nobel Chemical Awards awarded the three scientists who have founded the research and development of lithium batteries. However, there is still some problems in the primary stag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058C08G65/333
CPCC08G65/33396H01M10/0525H01M10/0565H01M10/058H01M2220/20Y02E60/10Y02P70/50
Inventor 赵朝委张月凤游胜勇晏南富李韦伟
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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