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Stellate reticulum solid or gel polymer electrolyte

A technology of polymer and gel state, which is applied in the field of star-shaped network solid or gel polymer electrolyte, can solve the problems of low ion conductivity, poor film formation and mechanical properties, etc., to improve ion conductivity, The effect of excellent electrical performance and simple process

Inactive Publication Date: 2010-05-12
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects of low ion conductivity and poor film-forming and mechanical properties of polymer electrolytes in the above-mentioned prior art, the present invention proposes a star-shaped network solid or gel-state polymer electrolyte, and simultaneously provides a one-step Preparation method of star-shaped network solid or gel-state polymer electrolyte membrane cast into film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 10g PEG400, 15g PEG600, 0.675g pentaerythritol and 180mL CH 2 Cl 2Add it into a dry three-necked flask. After the pentaerythritol is dissolved, add 15g of KOH powder, stir and react at 30°C, and then add 5g of KOH powder every 1h, 2h, and 4h. After a total of 20 hours of reaction, a milky white, viscous crude product was obtained, and the excess CH 2 Cl 2 , was dissolved in toluene, and KCl and unreacted KOH precipitates were removed by suction filtration to obtain a colorless and transparent viscous liquid. The high polymer was precipitated with petroleum ether, the dissolution-precipitation was repeated twice, the solvent was evaporated by rotary evaporation, and the product was vacuum-dried at 60°C for 24 hours. That is, about 26.5-30.5 g of the star-shaped network polymer matrix with pentaerythritol as the core and polyethylene oxide blocks as arms is obtained, and the yield is 81-93%.

[0022] Take 5 g of the above-mentioned star-shaped network polymer in a dry...

Embodiment 2

[0027] 10g PEG400, 15g PEG600, 0.5g pentaerythritol and 180mL CH 2 Cl 2 Add it into a dry three-necked flask. After the pentaerythritol is dissolved, add 15g of KOH powder, stir and react at 30°C, and then add 5g of KOH powder every 1h, 2h, and 4h. After a total of 20 hours of reaction, the crude product was obtained. The crude product was milky white and viscous, and the excess CH was evaporated. 2 Cl 2 , was dissolved in toluene, and KCl and unreacted KOH precipitates were removed by suction filtration to obtain a colorless and transparent viscous liquid. Precipitate the polymer with petroleum ether, repeat the dissolution-precipitation twice, spin off the solvent, and dry the product under vacuum at 60°C for 24 hours to obtain about 27.0-31.0 g of the star-shaped network polymer matrix, with a yield of 83-95%.

[0028] Take 5 g of the above-mentioned star-shaped network polymer in a dry three-necked flask, dissolve it in 20 mL of solvent acetonitrile and stir evenly at 4...

Embodiment 3

[0031] 10g PEG400, 15g PEG600, 0.750g pentaerythritol and 180mL CH 2 Cl 2 Add it into a dry three-necked flask. After the pentaerythritol is dissolved, add 15g of KOH powder, stir and react at 30°C, and then add 5g of KOH powder every 1h, 2h, and 4h. After a total of 20 hours of reaction, the crude product was obtained. The crude product was milky white and viscous, and the excess CH was evaporated. 2 Cl 2 , was dissolved in toluene, and KCl and unreacted KOH precipitates were removed by suction filtration to obtain a colorless and transparent viscous liquid. Precipitate the polymer with petroleum ether, repeat the dissolution-precipitation twice, spin off the solvent, and dry the product under vacuum at 60°C for 24 hours to obtain about 25.5-28.5 g of the star-shaped network polymer matrix, with a yield of 77-88%.

[0032] Take 5 g of the above-mentioned star-shaped network polymer in a dry three-necked flask, dissolve it in 20 mL of solvent acetonitrile and stir evenly at...

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PUM

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Abstract

The invention discloses a solid or gel star netted polymer electrolyte and preparing method, which comprises the following steps: adopting pentaerythritol as core and segmented copolymer of polyethylene oxide as star netted structure of arm; reacting PEG400, PEG600, pentaerythritol and CH2Cl2 under KOH; separating; purifying; drying; stirring polymer base and Li salt, solvent, nanometer SiO2 and plasticizer evenly to obtain the composite liquid; casting the composite liquid on the smooth politef board; evaporating solvent; making composite liquid flow into film automatically; drying in the vacuum to obtain the solid or gel star netted polymer electrolyte film.

Description

technical field [0001] The invention relates to a polymer electrolyte material, in particular to a star-shaped network solid or gel-state polymer electrolyte membrane. The star-shaped network polymer electrolyte produced by the invention has high ion conductivity and good film-forming properties Advantages, it is expected to replace traditional liquid electrolytes in lithium-ion secondary batteries, electrochromic devices and smart dimming windows, and has broad application prospects. technical background [0002] Polymer electrolyte (Solid Polymer Electrolytes, SPE) is one of the research hotspots in the field of polymer materials in the past 30 years. Due to its unique advantages such as light weight, good viscoelasticity, easy film formation, good thermal stability and high lithium ion conductivity, It has a wide range of applications in electrochemical devices such as lithium-ion secondary batteries, supercapacitors, ion sensors, all-solid-state electrochromic devices, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G83/00C08J5/18C08K5/05
Inventor 傅相锴龚永锋杨道均
Owner SOUTHWEST UNIV