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Graphene polymer electrolyte and preparation method thereof

A graphene and polymer technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve problems such as poor compatibility between organic groups and metal lithium, low conductivity of polymer electrolytes, and impact on use value, achieving Effects of high electrical conductivity, unique properties, and high mechanical strength

Inactive Publication Date: 2015-08-19
内蒙古源创绿能节能环保产业创业投资合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that existing polymer electrolytes have low electrical conductivity, insufficient mechanical strength, poor compatibility between organic groups and metal lithium, and the use value is affected. capacity, and a wider range of graphene polymer electrolytes

Method used

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  • Graphene polymer electrolyte and preparation method thereof
  • Graphene polymer electrolyte and preparation method thereof
  • Graphene polymer electrolyte and preparation method thereof

Examples

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Embodiment 1

[0032] This embodiment provides a graphene polymer electrolyte, which is prepared by reacting water-based polyurethane and graphene, specifically:

[0033] S1. In a 500ml four-neck flask equipped with a stirring thermometer, reflux condenser and feeder, add PEG (2000) and PTMG (2000) with a mass ratio of 1:1 according to the ratio of NCO / OH to 1.2. Dehydration at room temperature for 2 hours, cooling to 80°C, adding DMPA with a total mass of 4% of the PEG and PTEG, vacuum dehydration for 1 hour, cooling to 60°C to obtain a prepolymer, adding 3% of the prepolymer mass to it Solvent NMP, and add IPDI of 8% by mass of the prepolymer and T-12 of 0.03% by mass of the prepolymer, slowly raise the temperature to 85°C, and continue the reaction for 3h until the NCO value reaches the theoretical value, and the NCO value It can be determined by the di-n-butylamine method to obtain an NCO-terminated water-based polyurethane prepolymer, and then add 3% lithium disulfamate to the NCO-termi...

Embodiment 2

[0041] This embodiment provides a graphene polymer electrolyte, which is prepared by reacting water-based polyurethane and graphene, specifically:

[0042] S1. In a 500ml four-neck flask equipped with a stirring thermometer, reflux condenser and feeder, add PEG (2000) and PTMG (2000) with a mass ratio of 2:1 according to the NCO / OH ratio of 1.4. Dehydration at room temperature for 3 hours, cooling to 85°C, adding DMPA with a total mass of 3.5% of the PEG and PTEG, vacuum dehydration for 1.5 hours, cooling to 65°C to obtain a prepolymer, adding 5% of the mass of the prepolymer to it solvent NMP, and add 10% of the prepolymer mass of IPDI and 0.05% of the prepolymer mass of T-12, slowly heat up to 90 ° C, and continue the reaction for 4 hours until the NCO value reaches the theoretical value, the NCO The value can be measured by the di-n-butylamine method, promptly obtains the water-based polyurethane prepolymer of NCO termination, then adds the lithium disulfamate of 4% of the ...

Embodiment 3

[0050] This embodiment provides a graphene polymer electrolyte, which is prepared by reacting water-based polyurethane and graphene, specifically:

[0051] S1. In a 500ml four-neck flask equipped with a stirring thermometer, reflux condenser and feeder, add PEG (2000) and PTMG (2000) with a mass ratio of 1.5:1 according to the NCO / OH ratio of 1.8, at 120°C Dehydration at room temperature for 4 hours, after cooling to 75°C, adding DMPA with a total mass of 5% of the PEG and PTEG, vacuum dehydration for 2 hours, cooling to 70°C to obtain a prepolymer, adding 7% of the mass of the prepolymer to it Solvent NMP, and add 12% of the prepolymer mass of IPDI and 0.06% of the prepolymer mass of T-12, slowly raise the temperature to 90°C, and continue the reaction for 4.5h until the NCO value reaches the theoretical value, the NCO The value can be measured by the di-n-butylamine method, promptly obtains the water-based polyurethane prepolymer of NCO termination, then adds the lithium dis...

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Abstract

The invention discloses a graphene polymer electrolyte and a preparation method thereof. The polymer electrolyte is obtained by reaction of waterborne polyurethane and graphene, wherein the mass percent of the waterborne polyurethane in the graphene polymer electrolyte is 85 to 95wt percent, and the mass percent of the graphene in the graphene polymer electrolyte is 5 to 15wt percent. By combining high conductivity of the graphene and unique physical property of the waterborne polyurethane, the method of the invention can be used for obtaining the graphene polymer electrolyte with excellent performance, and can be further used for preparing a lithium ion battery based on the graphene polymer electrolyte. The obtained battery can be widely applied to electronic products such as mobile phones, computers, and vehicles such as automobiles and electric bicycles, and can be further applied in the aerospace field requiring for high energy density, long cycle life and small volume.

Description

technical field [0001] The invention belongs to the field of polymer lithium ion batteries, and relates to a polymer electrolyte, in particular to a graphene polymer electrolyte and a preparation method thereof. Background technique [0002] Since the commercial production of lithium-ion batteries by Sony Corporation in 1990, due to a series of advantages such as high energy density, long cycle life, safety and pollution-free, the research and development and production of lithium-ion batteries have become a hot spot in the battery industry. High-performance lithium-ion batteries have always been It is a battery product mainly developed by the battery industry at home and abroad. Polymer lithium-ion battery is a major breakthrough in the history of lithium-ion battery development. First of all, the electrolyte of this battery exists in the form of solid or colloid, there is no free liquid, no liquid leakage, so the processability and reliability Greatly improved, it does no...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M2300/0082Y02E60/10
Inventor 许家琳杨仕明许贻东
Owner 内蒙古源创绿能节能环保产业创业投资合伙企业(有限合伙)
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