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Preparation method and application of high lithium salt concentration aqueous polyurethane ionomer

A water-based polyurethane, salt concentration technology, applied in electrochemical generators, electrical components, 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, etc. Achieve the effect of high electrical conductivity, excellent comprehensive performance and high mechanical strength

Active Publication Date: 2015-10-07
济南恒元光电科技有限公司
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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 the preparation method and application of graphene polymer electrolyte component with wider range

Method used

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  • Preparation method and application of high lithium salt concentration aqueous polyurethane ionomer
  • Preparation method and application of high lithium salt concentration aqueous polyurethane ionomer
  • Preparation method and application of high lithium salt concentration aqueous polyurethane ionomer

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Embodiment 1

[0023] The present embodiment provides a kind of preparation method of the aqueous polyurethane ionomer of high lithium salt concentration, and it comprises the steps:

[0024] 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 waterborne polyurethane prepolymer;

[0025] S2. Add lithium disulf...

Embodiment 2

[0028] The present embodiment provides a kind of preparation method of the aqueous polyurethane ionomer of high lithium salt concentration, and it comprises the steps:

[0029] 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 Value can be measured by the di-n-butylamine method, promptly obtains the aqueous polyurethane prepolymer of NCO termination;

[0030] S2. Add lithium disulfam...

Embodiment 3

[0033] The present embodiment provides the preparation method of the aqueous polyurethane ionomer of a kind of high lithium salt concentration of high lithium salt concentration, and it comprises the steps:

[0034] 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 Value can be measured by the di-n-butylamine method, promptly obtains the aqueous polyurethane prep...

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Abstract

The present invention discloses a preparation method and application of a high lithium salt concentration aqueous polyurethane ionomer, the method comprises the following steps: S1, an aqueous polyurethane prepolymer is prepared from polyurethane hard segments and polyurethane soft segments in accordance with the proportion; and S2, diamido-sulfonate lithium is used for high lithium salt processing of the aqueous polyurethane prepolymer to obtain the high lithium salt concentration aqueous polyurethane ionomer, the conductivity of aqueous polyurethane can be significantly improved by high lithium ion concentration, due to differences in polarity, the polyurethane hard segments and polyurethane soft segments have the tendency to respective phase formation, the phase separation phenomenon provides an ideal environment for ion conduction; a graphene polymer electrolyte-based lithium-ion battery can be further prepared from the aqueous polyurethane ionomer, the graphene polymer electrolyte-based lithium-ion battery can be widely used in mobile phones, computers and other electronic products, automobiles, electric bicycles and other vehicles, and also can be used in aerospace fields and the like which requires 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 in particular relates to a preparation method of a waterborne polyurethane ionomer with high lithium salt concentration and its application in polymer electrolytes. Background technique [0002] According to the different electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries (Liquified Lithium-Ion Battery, referred to as LIB) and polymer lithium-ion batteries (Polymer Lithium-Ion Battery, referred to as PLB). Polymer lithium-ion batteries use solid polymer electrolytes. This polymer can be "dry" or "colloidal". The electrolyte does not contain free liquid and has no disadvantages of liquid leakage. It is not easy to burn and safe. High performance; At the same time, the appearance flexibility is high, and it can be made into batteries of various shapes and ultra-thin batteries; it has a longer service life and less...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0525H01M10/0565Y02E60/10
Inventor 许家琳杨仕明许贻东
Owner 济南恒元光电科技有限公司
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