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Single-ion polymer electrolyte, and preparation method and application thereof

A polymer and electrolyte technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of lithium ion concentration, mechanical properties, high ion conductivity, etc., to achieve simple synthesis, Good thermal stability and wide electrochemical window

Active Publication Date: 2018-11-16
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems that the existing polymer electrolytes cannot have both low glass transition temperature and high lithium ion concentration, high ion conductivity and excellent mechanical properties, and provide A kind of solid electrolyte material for polyurethane lithium ion battery and its preparation method and application

Method used

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  • Single-ion polymer electrolyte, and preparation method and application thereof
  • Single-ion polymer electrolyte, and preparation method and application thereof
  • Single-ion polymer electrolyte, and preparation method and application thereof

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specific Embodiment approach 1

[0023] Embodiment 1: The preparation method of the single-ion polymer electrolyte in this embodiment is implemented according to the following steps:

[0024] 1. Under the protection of an inert gas atmosphere, add lithium dicarboxybenzenesulfonate and polyethylene oxide into the solvent at a molar ratio of 1:2.0~2.1, conduct condensation reaction at a temperature of 120~140°C, wash with water, and dry Afterwards, the reaction product is obtained;

[0025] 2. Add the reaction product obtained in step 1 and p-phenylene diisocyanate or 4,4'-methylene bis(phenylisocyanate) into the solvent at a molar ratio of 1:1, and at a temperature of 90-120°C The polycondensation reaction is carried out under the following conditions to obtain a polymer product, and the polymer product is purged, washed with water, and dried after dialysis to obtain a polymer electrolyte;

[0026] 3. Dissolving the polymer electrolyte obtained in step 2 in N,N-dimethylformamide, casting and drying to form a ...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment is different from Embodiment 1 in that the inert gas described in step 1 is nitrogen or argon.

specific Embodiment approach 3

[0031] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the solvent described in step 1 and step 2 is N,N-dimethylformamide (DMF), N,N-dimethylformamide amide (DMAc) or N-methylpyrrolidone (NMP).

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Abstract

The invention relates to a single-ion polymer electrolyte, and a preparation method and an application thereof, belongs to the technical fields of organic polymer functional materials and electrochemistry, and solves the problems that the existing polymer electrolyte can not achieve relatively low glass transition temperature and relatively high lithium ion concentration, and relatively high ionicconductivity and excellent mechanical property synchronously. According to the preparation method disclosed by the invention, lithium dicarboxy benzenesulfonate and polyoxyethylene are subjected to condensation, separating and purifying to obtain a product; and the obtained product and p-phenylene diisocyanate or 4, 4'-methylene bis (phenyl isocyanate) are subjected to polycondensation reaction to obtain a polymer electrolyte membrane. The single-ion type polymer electrolyte can strictly regulate and control Li+ / EO ratio to form a micro-phase separated two-phase structure, so that the polymerelectrolyte has relatively high electrical conductivity, relatively low glass transition temperature and excellent mechanical property synchronously. Meanwhile, the method has the advantages that thepreparation is simple, the raw materials are easy to obtain, the lithium ion migration number and the electrochemical stability window are relatively high, and the like.

Description

technical field [0001] The invention belongs to the technical field of organic macromolecular functional materials and electrochemistry, specifically relates to a novel polyurethane polymer electrolyte and a synthesis method thereof, and is applied in an all-solid-state polymer lithium-ion battery. Background technique [0002] In the 21st century, with the development of the world economy and the improvement of people's living standards, the contradiction between energy supply and energy demand has become increasingly acute. In response to the severe "energy crisis" and strict environmental protection requirements, governments of various countries have encouraged the development of new green energy. However, the widespread application of new green energy must be realized by forming a small grid with energy storage devices. At the same time, the development of portable electronic products and electric vehicles also requires energy storage devices with high power and high en...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 陈向群王乃婕宋英孙秋
Owner HARBIN INST OF TECH
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