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Preparation method and application of solid electrolyte polymer modified by gas phase permeation method

A solid-state electrolyte, gas-phase infiltration technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of poor dispersion uniformity, reduced surface performance, weak interaction force, etc., to achieve low difficulty and reduce interface. resistance, the effect of increasing uniformity

Pending Publication Date: 2021-07-30
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the most commonly used method to prepare composite polymer solid electrolytes is to physically mix fillers with the electrolyte. The interaction between fillers and polymers incorporated in this way is weak, and agglomeration will occur to reduce their surface properties, resulting in dispersion Poor uniformity, which limits the improvement of ionic conductivity and lithium ion migration number

Method used

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  • Preparation method and application of solid electrolyte polymer modified by gas phase permeation method
  • Preparation method and application of solid electrolyte polymer modified by gas phase permeation method
  • Preparation method and application of solid electrolyte polymer modified by gas phase permeation method

Examples

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Effect test

Embodiment 1

[0022] A kind of preparation of solid electrolyte polymer modified by gas phase infiltration method:

[0023] Vapor phase infiltration method can be realized by atomic layer deposition equipment, put polyethylene oxide (PEO) powder in the sample barrel for heating and preheating and at the same time mechanically stir or vibrate for 1-2h, and then follow the diethyl zinc The mass ratio of zinc to the solid electrolyte polymer is 1% and the molar ratio of diethylzinc and deionized water is 0.75:1, and the chemical precursor source diethylzinc is alternately fed to make polyethylene oxide Alkanes adsorb diethyl zinc; pass inert gas high-purity argon for purging; then pass through chemical precursor source deionized water to make zinc oxide nanoparticles inside the polymer; finally pass high-purity argon for purging, The modified solid electrolyte polymer was obtained after 10 cycles of gas phase infiltration. The mass fraction of Zn in the material was 6 wt%, and the correspondin...

Embodiment 2

[0034] A kind of preparation of solid electrolyte polymer modified by gas phase infiltration method:

[0035] Vapor phase infiltration method can be realized by atomic layer deposition equipment, put polyethylene oxide (PEO) powder in the sample barrel for heating and preheating and at the same time mechanically stir or vibrate for 1-2h, and then follow the diethyl zinc The mass ratio of zinc to the solid electrolyte polymer is 1% and the molar ratio of diethylzinc and deionized water is 0.75:1, and the chemical precursor source diethylzinc is alternately fed to make polyethylene oxide Alkanes adsorb diethyl zinc; pass inert gas high-purity argon for purging; pass in chemical precursor source deionized water to generate zinc oxide nanoparticles inside the polymer; then pass inert gas high-purity argon for purging; The modified solid electrolyte polymer was obtained after 5 cycles of the gas phase infiltration cycle. The mass fraction of Zn in this material was measured to be 2...

Embodiment 3

[0046] A kind of preparation of solid electrolyte polymer modified by gas phase infiltration method:

[0047] Vapor phase infiltration method can be realized by atomic layer deposition equipment, put polyethylene oxide (PEO) powder in the sample barrel for heating and preheating and at the same time mechanically stir or vibrate for 1-2h, and then follow the diethyl zinc The mass ratio of zinc to the solid electrolyte polymer is 1% and the molar ratio of diethyl zinc to deionized water is 0.5 to 1:1, and the chemical precursor source diethyl zinc is alternately introduced to make the polycyclic Oxyethane adsorbs diethyl zinc; pass inert gas high-purity argon for purging; pass in chemical precursor source deionized water to make zinc oxide nanoparticles inside the polymer; then pass inert gas high-purity argon for blowing Sweep; After 15 cycles of the above-mentioned gas phase infiltration cycle, the modified solid electrolyte polymer is obtained. The mass fraction of Zn measure...

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Abstract

The invention discloses a preparation method and application of a solid electrolyte polymer modified by a gas phase permeation method. The preparation method comprises the following steps: placing a solid electrolyte polymer in a sample barrel in a reaction cavity of deposition equipment, preheating while stirring, and then alternately introducing a gas-phase chemical precursor source and inert gas to perform gas-phase permeation circulation, so uniform nano filler grows in the polymer, and the modified solid electrolyte polymer is obtained. According to the invention, the filler directly grows in the polymer by a gas phase permeation method, compared with physical mixing, the size of the filler is smaller, and the filler and the polymer have stronger chemical interaction, so the dispersion uniformity of the filler is increased, and the ionic conductivity and the lithium ion transference number of the electrolyte can be better improved; in addition, a small particle size and homogeneously dispersed filler may be present on the surface of the solid electrolyte membrane, thereby reducing interfacial resistance to lithium by forming an alloy with lithium metal.

Description

technical field [0001] The invention relates to a preparation method and application of a solid electrolyte polymer modified by a gas phase infiltration method, and belongs to the technical field of energy materials. Background technique [0002] Polymer solid-state electrolytes have become one of the most promising solid-state electrolytes due to their high flexibility, low cost, and ease of integration. However, low ionic conductivity, low Li-ion transfer number, small electrochemical window, and large interfacial resistance limit their practical applications. [0003] Incorporating inorganic fillers into the polymer matrix to prepare composite polymer solid state electrolytes can reduce the crystallinity of the polymer and improve the ion conductivity. In addition, the filler can also adsorb anions, increase the lithium ion migration number and increase the mechanical strength. However, the most commonly used method to prepare composite polymer solid electrolytes is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0085Y02E60/10
Inventor 谢琎包文达
Owner SHANGHAI TECH UNIV
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