Octa(chloro-propyl)-POSS/polyolefin spinning fiber gel polymer electrolyte and preparation method

A gel polymer, octachloropropyl technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, conjugated synthetic polymer artificial filaments, etc., can solve the difficult to meet the assembly requirements of dynamic LIB, spinning film mechanics Poor performance and other problems, to achieve high liquid absorption and porosity, improve the effect of safety

Inactive Publication Date: 2017-09-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current electrospun gel polymer electrolyte has problems such as poor mechanical properties of the spun film, which is difficult to meet the assembly requirements of dynamic LIB.

Method used

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  • Octa(chloro-propyl)-POSS/polyolefin spinning fiber gel polymer electrolyte and preparation method
  • Octa(chloro-propyl)-POSS/polyolefin spinning fiber gel polymer electrolyte and preparation method
  • Octa(chloro-propyl)-POSS/polyolefin spinning fiber gel polymer electrolyte and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Synthesis of POSS-(C 3 h 6 Cl) 8 , The ratio of raw materials is anhydrous methanol: chloropropyltrimethoxysilane: concentrated hydrochloric acid=100:5:4 (volume ratio). The POSS-(C 3 h 6 Cl) 8 and PVDF were placed in a vacuum oven at 60°C for 24 hours, and the polymer solvent DMF was distilled under reduced pressure and added Molecular sieves stand for more than 12h;

[0027] Step 2: Weigh DMF, acetone and PVDF according to the mass ratio of 68:17:15, heat and stir in a water bath at 30°C to form a polymer solution, and then weigh POSS-(C 3 h 6 Cl) 8 Blending with the above-mentioned polymer solution in turn, heating and stirring until it dissolves completely to obtain a spinning solution;

[0028] Step 3: Electrospin the spinning solution in step 2 on commercial PP to obtain a spun film, and dry it in a vacuum oven at 40° C. for 24 hours to obtain a POSS modified fiber film. The parameters of the electrospinning are: the spinning voltage is 15kV, th...

Embodiment 2

[0031] Step 1: Synthesis of POSS-(C 3 h 6 Cl) 8 , The ratio of raw materials is anhydrous methanol: chloropropyltrimethoxysilane: concentrated hydrochloric acid=100:5:4 (volume ratio). The POSS-(C 3 h 6 Cl) 8 and PVDF were placed in a vacuum oven at 60°C for 24 hours, and the polymer solvent DMF was distilled under reduced pressure and added Molecular sieves stand for more than 12h;

[0032] Step 2: Weigh DMF, acetone, PVDF, and PAN according to the mass ratio of 68:17:10:5, heat and stir in a water bath at 30°C to form a polymer solution, and then weigh 5%, 10%, and 15% of the mass sum of PVDF and PAN % Weigh POSS-(C 3 h 6 Cl) 8 Blending with the above-mentioned polymer solution in turn, heating and stirring until it dissolves completely to obtain a spinning solution;

[0033] Step 3: Electrospin the spinning solution in step 2 on commercial PP to obtain a spun film, and dry it in a vacuum oven at 40° C. for 24 hours to obtain a POSS modified fiber film. The param...

Embodiment 3

[0036] Step 1: Synthesis of POSS-(C 3 h 6 Cl) 8 , The ratio of raw materials is anhydrous methanol: chloropropyltrimethoxysilane: concentrated hydrochloric acid=100:5:4 (volume ratio). The POSS-(C 3 h 6 Cl) 8 and PVDF were placed in a vacuum oven at 60°C for 24 hours, and the polymer solvent DMF was distilled under reduced pressure and added Molecular sieves stand for more than 12h;

[0037] Step 2: Weigh DMF, acetone, PVDF, PMMA, and PAN according to the mass ratio of 68:16:8:4:4, heat and stir in a water bath at 30°C to form a polymer solution, and then weigh PVDF, PMMA, and PAN according to the mass sum of 5 %, 10%, 15% weigh POSS-(C 3 h 6 Cl) 8 Blending with the above-mentioned polymer solution in turn, heating and stirring until it dissolves completely to obtain a spinning solution;

[0038] Step 3: Electrospin the spinning solution in step 2 on commercial PP to obtain a spun film, and dry it in a vacuum oven at 40° C. for 24 hours to obtain a POSS modified fib...

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Abstract

The invention relates to octa(chloro-propyl)-POSS/polyolefin spinning fiber gel polymer electrolyte and a preparation method. The method is the method for preparing octa(chloro-propyl)-POSS(POSS-(C3H6Cl)8) modified polyolefin gel polymer electrolyte through electrostatic spinning. A spinning solution is composed of 1-3 parts of octa(chloro-propyl)-POSS hybrid material, 5-20 parts of polymer matrix, 15-30 parts of solvent (parts by mass). The prepared spinning solution deposits the fiber on the polyolefin diaphragm surface through the electrostatic spinning technology. The POSS modified gel electrolyte prepared through the electrostatic spinning has high liquid absorption rate and porosity, and the POSS hybrid material can obviously improve the thermal and mechanical performance of the gel polymer electrolyte, thereby improving the security of a lithium ion battery. The composite modified gel polymer electrolyte disclosed by the invention can satisfy the requirement of the ion conductivity and the mechanical property as the lithium ion battery electrolyte.

Description

technical field [0001] The invention belongs to the technical field of gel polymer electrolyte preparation, and relates to an octachloropropyl-POSS / polyolefin spinning fiber gel polymer electrolyte and a preparation method. Background technique [0002] With the promotion and popularization of various portable electronic devices, chemical power sources, as one of their key components, have also received more and more attention. Due to the advantages of higher working voltage, larger capacity and no memory effect than Ni-MH and Ni-Cd batteries, the application field of lithium-ion batteries (LIB) has rapidly expanded from various portable electrical equipment to hybrid power (PHEV) and pure electric (EV) vehicles. However, in addition to higher voltage, higher power and more electricity, power LIB needs to pay more attention to safety issues. The inorganic nanoparticle composite gel polymer electrolyte prepared by the solution casting method or the phase inversion method ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/058D01D5/00D01F1/10D01F6/48D01F8/08D01F8/10
CPCD01D5/003D01D5/0084D01F1/10D01F6/48D01F8/08D01F8/10H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 马晓燕刘依杨凯淇马敬玉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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