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A controllable light-curable PEG solid-state topology polymer electrolyte and preparation method thereof

A topology and polymer technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of poor polymer fluidity, film formation and mechanical properties, and achieve good ionic conductivity.

Inactive Publication Date: 2018-12-21
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymers with this structure have strong fluidity, poor film-forming properties and mechanical properties, and generally cannot be used as a polymer matrix for solid electrolytes alone. Therefore, linear polymers with better film-forming properties can be used to assist in film formation.

Method used

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  • A controllable light-curable PEG solid-state topology polymer electrolyte and preparation method thereof
  • A controllable light-curable PEG solid-state topology polymer electrolyte and preparation method thereof
  • A controllable light-curable PEG solid-state topology polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: LiClO 4 , 400WPEO, POSS-(PEG2000) 8 They were dried in a vacuum oven at 90°C, 60°C, and 55°C for 24 hours, respectively, and placed in a glove box for later use.

[0036] Step 2: Weigh PEO and POSS-(PEG2000) according to the mass ratio of 60:40, 50:50, and 40:60 respectively 8 , weigh LiClO according to the EO:Li molar ratio of 16:1 4 , weigh PETA according to 0.5wt% of the total mass of the polymer, place the weighed medicine in a sample bottle, add acetonitrile whose mass is 18 times the total mass of the polymer, and magnetically stir at room temperature for 24 hours in the dark.

[0037] Step 3: Pour the solution into a polytetrafluoroethylene petri dish, place it in a vacuum oven and evacuate it for 3 times to remove air bubbles, then volatilize at room temperature to remove the solvent.

[0038] Step 4: Adjust the distance between the UV mercury lamp and the petri dish to 10cm. After 40 minutes of UV irradiation, tear off the film and then irradiate the...

Embodiment 2

[0040] Step 1: Combine LiDFOB, 100WPEO, POSS-(PEG5000) 8 They were dried in a vacuum oven at 90°C, 60°C, and 55°C for 24 hours, respectively, and placed in a glove box for later use.

[0041]Step 2: Weigh PEO and POSS-(PEG5000) according to the mass ratio of 30:70 8 , weigh LiDFOB according to the EO:Li molar ratio of 16:1, weigh PETA according to 1wt% of the total mass of the polymer, place the weighed medicine in a sample bottle, add acetonitrile to 20 times the total mass of the polymer Then, magnetically stir at room temperature for 24 h in the dark.

[0042] Step 3: Pour the solution into a polytetrafluoroethylene petri dish, place it in a vacuum oven and evacuate it for 3 times to remove air bubbles, then volatilize at room temperature to remove the solvent.

[0043] Step 4: Adjust the distance between the UV mercury lamp and the petri dish to 8cm. After irradiating with UV light for 30 minutes, tear off the film and then irradiate the reverse side of the film with UV ...

Embodiment 3

[0045] Step 1: LiClO 4 , 60WPEO, POSS-(PMMA-PEG2000) 8 They were dried in a vacuum oven at 90°C, 60°C, and 55°C for 24 hours, and placed in a glove box for later use.

[0046] Step 2: Weigh PEO and POSS-(PMMA-PEG2000) according to the mass ratio of 50:50 8 , weigh LiClO according to the EO:Li molar ratio of 16:1 4 , weigh PETA according to 2wt% of the total mass of the polymer, put the weighed medicine in the sample bottle, add the mixed solvent (acetonitrile accounts for 30wt%, tetrahydrofuran accounts for 70%) after the quality is 18 times of the total mass of the polymer, Stir magnetically at room temperature for 18 h in the dark.

[0047] Step 3: Pour the solution into a polytetrafluoroethylene petri dish, place it in a vacuum oven and evacuate it for 3 times to remove air bubbles, then volatilize at room temperature to remove the solvent.

[0048] Step 4: Adjust the distance between the UV lamp and the petri dish to 6cm. After 20 minutes of UV irradiation, tear off th...

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Abstract

A controllable light-curable PEG solid-state topology polymer electrolyte and a preparation method thereof, A controllable light-curable PEG solid-state topology polymer electrolyte is prepared from PEO, lithium salts and star-shaped homopolymers or star-shaped block copolymers containing EO structural units, Pentaerythritol triacrylate (PETA) was synthesized by radical polymerization of PETA initiated by ultraviolet light with the addition of polyfunctional monomer pentaerythritol triacrylate. The solid electrolyte designed by the invention has good ionic conductivity, mechanical properties,electrochemical stability and thermal stability.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery electrolytes, and relates to a controllable light-curable PEG solid topological structure polymer electrolyte and a preparation method. After introducing special monomers into polymers with different structures, the exchange between polymers is realized by ultraviolet light triggering. Controlling the network structure. Background technique [0002] Facing the increasingly serious problems of resource scarcity and environmental pollution, accelerating the development of clean energy has become a top priority. Lithium-ion batteries have aroused extensive research interest because of their high specific energy and power density, stable cycle performance, and environmental friendliness as clean energy storage devices for electric vehicles and smart grids. However, the organic carbonate electrolyte contained in the traditional liquid electrolyte system has potential safety hazards such as volatiliz...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565Y02E60/10
Inventor 马晓燕张敏马敬玉张齐管兴华
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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