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Solid electrolyte for lithium ion battery and application thereof

A solid-state electrolyte, lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems that lithium batteries are difficult to be processed into thin shapes, limited application scope, leakage safety hazards, etc., to enhance mechanical properties, High ion selectivity, effect of reducing crystallinity

Active Publication Date: 2012-10-17
王海斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The electrolytes used in most commercial lithium-ion batteries are mainly organic electrolytes. Lithium-ion batteries using organic electrolytes have potential safety hazards of leakage during use.
And because the electrolyte is liquid, it is difficult to process this type of lithium battery into a thin shape, which limits its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation components are COF-8, polyoxyethylene, LiClO 4 Lithium-ion battery solid electrolyte, the mass ratio of each component is: COF-8: polyoxyethylene: LiClO 4 =10:85:5. The specific preparation process is as follows

[0027] According to the technical requirements, first synthesize COF-8, prepare 50mL of 1,3,5-trimethylbenzene and dioxane solvent mixed in a volume ratio of (what ratio? volume or weight or mole?) 1:1, and then add 1.57mmol of 2,3,6,7,10,11-hexahydroxytriphenylene and 1.77mmol of 1,3,5-m-benzenetriboronic acid were heated to 85°C after ultrasonication at room temperature for 30min, and a gray powder was obtained after 3 days. The powder was washed with 20 mL of water and acetone three times, and then the obtained powder was activated in 50 mL of anhydrous acetone for 2 days, and finally dried under vacuum at 85°C to obtain 0.295 mmol of COF-8. Then weigh 0.55g of PEO (polyoxyethylene, 4,000,000 molecular weight) in the glove box, and use 20...

Embodiment 2

[0029] The preparation components are MOF-5, polyoxyethylene, LiClO 4 Lithium-ion battery solid electrolyte, the mass ratio of each component is: MOF-5: polyoxyethylene: LiClO 4 =76:23:1. The specific preparation process is as follows

[0030]According to the technical requirements, first synthesize MOF-5, weigh 1.50mmol zinc nitrate hexahydrate and 0.50mmol terephthalic acid, add to 49mL DMF (N,N-dimethylformamide), then add 1mL deionized water, Heating under the protection of argon for 7 hours to obtain white powder crystals, after cooling down to room temperature, impregnated with DMF 3 times, 50 mL each time, 12 hours, then exchanged and activated with dichloromethane solvent 3 times, 50 mL each time, 12 hours, and then The solvent was evaporated under vacuum at 40°C to obtain 0.083 mmol of MOF-5 white powder. Then weigh 0.019g of PEO (polyoxyethylene, 4,000,000 molecular weight) in the glove box, and use 4mL of acetonitrile as a solvent to prepare PEO / LiClO with a Li / O...

example 3

[0032] The preparation components are modified MOF-5, polyoxyethylene and polyacrylonitrile copolymer, LiPF 6 Lithium-ion battery solid electrolyte, the mass ratio of each component is: ①Modified MOF-5: polyoxyethylene and polyacrylonitrile copolymer: LiPF 6 =50:45:5; ②Modified MOF-5: Copolymer of polyoxyethylene and polyacrylonitrile: LiPF 6 =70:25:5; ③Modified MOF-5: Copolymer of polyoxyethylene and polyacrylonitrile: LiPF 6 =80:15:5. The specific preparation process is as follows

[0033] According to the technical requirements, first synthesize MOF-5, weigh 15mmol zinc nitrate hexahydrate and 5mmol terephthalic acid, add to 490mL DMF (N,N-dimethylformamide), then add 10mL deionized water, Heating under air protection for 7 hours to obtain white powder crystals, after cooling down to room temperature, impregnated with DMF 3 times, 50mL each time, 12 hours, then exchanged and activated with dichloromethane solvent 3 times, 50mL each time, 12 hours, and then vacuum, The s...

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Abstract

The invention discloses a solid electrolyte for lithium ion battery and an application thereof. The electrolyte comprises a polyoxyethylene and / or polyoxyethylene derivative, an inorganic-organic hybrid framework and lithium salt. The inorganic-organic hybrid framework is one selected from a metal organic framework (MOF), a covalent-organic framework (COF) and a zeolite imidazole framework (ZIF). The prepared lithium ion cell electrolyte can be used to avoid safety problems such as cell combustion, even explosion and the like which are caused by leakage of traditional lithium ion batteries and has high lithium ion conductivity. By the use of the solid electrolyte, thinning of lithium ion batteries can be realized, so as to extend their application range.

Description

technical field [0001] The invention relates to a lithium ion battery solid electrolyte. Background technique [0002] At present, the electrolyte used in most commercial lithium-ion batteries is mainly organic electrolyte, and lithium-ion batteries using organic electrolyte have potential safety hazards of leakage during use. And because the electrolyte is liquid, it is difficult to process this type of lithium battery into a thin shape, which limits its application range. [0003] As more and more researchers invest in the research on the safety and application of lithium-ion batteries, solid-state electrolytes gradually show characteristics superior to traditional electrolytes. How to develop solid-state electrolytes with high lithium-ion conductivity and machinability has become a One of the hotspots in researching lithium-ion batteries at present. [0004] Research in this area is currently focused on two points: one is a solid electrolyte with polymer as the main bod...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCY02E60/12Y02E60/10
Inventor 刘晋韩鹏飞李劼赖延清张治安袁长福
Owner 王海斌
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