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Preparation method and application of first-class solid polymer electrolyte

A solid polymer and polymer technology, applied in the direction of solid electrolyte, non-aqueous electrolyte, non-aqueous electrolyte battery, etc., can solve the problems of low ionic conductivity, achieve simple preparation method, improve flexibility, and facilitate large-scale production Effect

Active Publication Date: 2017-08-18
BEIJING IAMETAL NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the regular stacking of layers of a single polymer, the polymer has good crystallinity and mechanical strength, but it largely limits the polymer's chain segment mobility and has low ionic conductivity. , so the contradiction between mechanical properties and ionic conductivity often mentioned in polymer electrolytes arises

Method used

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  • Preparation method and application of first-class solid polymer electrolyte
  • Preparation method and application of first-class solid polymer electrolyte
  • Preparation method and application of first-class solid polymer electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of the polymer electrolyte precursor solution: according to the mass ratio of 10:3, the poly(dimethylsiloxane) diglycidyl ether was capped, and the amino polystyrene microspheres were mixed evenly, and kept for 2 hours. On the premise that the molar ratio of ethylene glycol diacrylate to poly(dimethylsiloxane) diglycidyl ether end-blocking is 1:1, add Li[B(C2O4)2] with a mass ratio of 3:10:0.1 , polyethylene glycol diacrylate, and initiator benzoyl peroxide are mixed uniformly at room temperature. Wherein, the particle diameter of the aminopolystyrene microspheres is 50nm.

[0036] (2) Preparation of solid polymer electrolyte: the precursor solution obtained in step 1 was evenly coated on the polytetrafluoroethylene substrate at a ratio of 50 microliters per square centimeter, and thermally polymerized in an oven at 200° C. for 5 hours.

[0037] (3) Preparation of lithium iron phosphate cathode material: mix lithium iron phosphate, the polymer precursor...

Embodiment 2

[0041] Except changing thermal initiator benzoyl peroxide into photoinitiator 1-hydroxycyclohexyl phenyl ketone in embodiment 1 (1), and changing thermal polymer polyethylene glycol diacrylate into photopolymerization 1,4-butanediol diacrylate was polymerized for 30 minutes at a distance of 10 cm from a 2 kW UV lamp. Other conditions are exactly the same, and the test performance is listed in Table 1.

Embodiment 3

[0043] Except changing thermal initiator into microwave initiator azobisisobutyronitrile in embodiment 1 (1), thermal polymer is changed into microwave polymer vinyl acetate, at 10GHz, polymerization 20min under the power of 1000w, other conditions In full agreement, the test performance is listed in Table 1.

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Abstract

The invention discloses a preparation method of solid polymer electrolyte with good toughness and good thermal stability and application thereof in lithium batteries. The preparation method of the solid polymer electrolyte at least comprises the following steps: uniformly distributing a polymer cross-linked network linked with nanoparticles, another polymer monomer, conductive salt and an initiator on the molecular level to obtain polymeric precursor solution; coating a base material or the surface of an electrode with the polymeric precursor solution; and preparing solid polymer electrolyte which comprises the nanoparticles by polymerization. The method is high in controllability and simple and convenient to operate, and has good application prospect. The nanoparticles are introduced, so that the obtained solid polymer electrolyte has good flexibility; and meanwhile, by synergetic enhancement of another polymer, the solid polymer electrolyte has good thermal stability and excellent ionic conductivity.

Description

[0001] Technical field: [0002] The invention relates to a kind of solid polymer electrolyte linked with nanoparticles and its application in lithium batteries. [0003] Background technique: [0004] With the increasingly serious environmental pollution and the increasing scarcity of fossil fuels, the research and development of clean, convenient and safe electrochemical energy storage technologies occupies a more important position. Lithium batteries have received more and more attention due to their high energy density, high power density and faster charge and discharge. As the negative electrode of lithium batteries, metal lithium has a high energy density (3860mA h g -1 ), but the poor safety of lithium metal liquid batteries greatly limits the development of lithium metal batteries. In the all-solid-state lithium metal battery, the flammable electrolyte and the loose and porous diaphragm are replaced by a solid electrolyte with a certain mechanical strength, thereby sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052
CPCH01M10/052H01M10/0565H01M2300/0082Y02E60/10
Inventor 郭玉国段惠殷雅侠万立骏
Owner BEIJING IAMETAL NEW ENERGY TECH CO LTD
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