Organic silicon electrolyte as well as preparation method and application thereof

A technology of organosilicon and electrolytes, which is applied in composite electrolytes, electrolyte immobilization/gelation, circuits, etc., and can solve problems such as unsatisfactory mechanical properties, large interface impedance, and low conductivity

Active Publication Date: 2021-09-17
广东萨菲安新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an organic silicon electrolyte and its preparation method, which can solve the problems of poor electrode contact, large interface impedance, low electrical conductivity, easy crystallization, narrow applicable temperature range, and unsatisfactory mechanical properties.

Method used

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  • Organic silicon electrolyte as well as preparation method and application thereof
  • Organic silicon electrolyte as well as preparation method and application thereof
  • Organic silicon electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0044] This embodiment includes the following specific steps:

[0045] S1. Preparation of organosilicon electrolyte matrix: in a 250mL dry four-necked flask with a thermometer, a condenser, and a stirrer fed with argon at the same time, 0.25mol of allyl polyethylene glycol (molecular weight 400) and 0.3mol of HSi (OC 2 H 5 ) 3 Add to the bottle, stir and heat up to 60 o C, drop 0.4mL of chloroplatinic acid solution, continue to react for 2h and then drop to room temperature and then discharge, remove unreacted HSi (OC) by vacuum distillation 2 H 5 ) 3 , to obtain the hydrosilylation product. Mix 0.1 mol of the hydrosilylation product, 0.1 mol of triethylamine and 50 mL of tetrahydrofuran, and then add it to a flask with a thermometer, a condenser, a stirrer, and a constant pressure funnel, and dissolve 0.12 mol of methacryloyl chloride in 30 mL of tetrahydrofuran. , pour it into a constant pressure funnel, stir and control the temperature at 50 °C, add it to the flask fo...

Embodiment 2

[0049] This embodiment includes the following specific steps:

[0050] S1. Preparation of organosilicon electrolyte matrix: in a 250mL dry four-necked flask with a thermometer, a condenser, and a stirrer fed with argon at the same time, 0.25mol of allyl polyethylene glycol (molecular weight 600) and 0.3mol of HSi (OCH 3 ) 3 Add to the bottle, stir and heat up to 60 o C, drop 0.4mL of chloroplatinic acid solution, continue to react for 2h and then drop to room temperature and then discharge, remove unreacted HSi (OCH) by vacuum distillation 3 ) 3 , to obtain the hydrosilylation product. Mix 0.1 mol of the hydrosilylation product, 0.1 mol of triethylamine and 50 mL of tetrahydrofuran, and then add it to a flask with a thermometer, a condenser, a stirrer, and a constant pressure funnel, and dissolve 0.12 mol of methacryloyl chloride in 30 mL of tetrahydrofuran. , pour it into a constant pressure funnel, stir and control the temperature at 50 °C, add it to the flask for about...

Embodiment 3

[0054] This embodiment includes the following specific steps:

[0055] S1. Preparation of organosilicon electrolyte matrix: in a 250mL dry four-necked flask with a thermometer, a condenser, and a stirrer fed with argon at the same time, 0.25mol of allyl polyethylene glycol (molecular weight 600) and 0.3mol of HSi (OCH 3 ) 3 Add to the bottle, stir and heat up to 60 o C, drop 0.4mL of chloroplatinic acid solution, continue to react for 2h and then drop to room temperature and then discharge, remove unreacted HSi (OCH) by vacuum distillation 3 ) 3 , to obtain the hydrosilylation product. Mix 0.1 mol of the hydrosilylation product, 0.1 mol of triethylamine and 50 mL of tetrahydrofuran, and then add it to a flask with a thermometer, a condenser, a stirrer, and a constant pressure funnel, and dissolve 0.12 mol of methacryloyl chloride in 30 mL of tetrahydrofuran. , pour it into a constant pressure funnel, stir and control the temperature at 50 °C, add it to the flask for about...

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Abstract

The invention provides an organic silicon electrolyte as well as a preparation method and application thereof, and the organic silicon electrolyte is prepared by the following steps: reacting all components in percentage by mass to obtain a prepolymer, and crosslinking and curing to obtain the organic silicon electrolyte. The prepolymer comprises the following components in percentage by mass: 2-70% of organic silicon electrolyte matrix, 5-30% of high dielectric constant organic silicon, 10-40% of a lithium salt, 1-20% of an organic silicon electrolyte matrix modified inorganic filler and 0.1-5% of an initiator. According to the invention, a polymer monomer material with lithium-conducting capacity and inorganic particle surface modification capacity is synthesized and can be cured into a solid electrolyte, through coupling modification with inorganic particles, good dispersion capacity is achieved, and a special interface channel for lithium ion conduction is constructed to improve the electrolyte performance, and the security of the battery is enhanced by the solid-state structure.

Description

technical field [0001] The present invention relates to the technical field of lithium battery materials, and more particularly, to an organic silicon electrolyte and a preparation method and application thereof. Background technique [0002] At present, the electrolyte of commercial lithium-ion battery is mainly dissolved lithium hexafluorophosphate (LiPF 6 ) mixed solvent system of cyclic carbonate and chain carbonate, the system has good solubility of lithium salt, high ionic conductivity, and can form a stable solid electrolyte interface film (SEI film) on the surface of graphite negative electrode. However, such materials have shortcomings such as easy leakage, volatility, flammability, and insufficient oxidation resistance, which limit the further improvement of the energy density of lithium-ion batteries and easily lead to safety accidents. [0003] As the market demands higher and higher energy density and safety of lithium-ion batteries, the development of high-vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0565H01M10/0525H01M2300/0085H01M2300/0088Y02E60/10
Inventor 汤依伟郑世林雷桂斌
Owner 广东萨菲安新材料有限公司
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