Unlock instant, AI-driven research and patent intelligence for your innovation.

Polymer electrolyte membrane containing poss-based quaternary ammonium salt ionic liquid and preparation method thereof

A quaternary ammonium salt and ionic liquid technology, applied in the field of polymer electrolyte membrane and its preparation, can solve the problems of low ionic conductivity, interface impedance limitation and the like, and achieve a simple manufacturing method, improved ionic conductivity and high safety performance. Effect

Active Publication Date: 2020-09-04
SHANGHAI UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low ionic conductivity and large interfacial impedance of solid polymer electrolytes severely limit its applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer electrolyte membrane containing poss-based quaternary ammonium salt ionic liquid and preparation method thereof
  • Polymer electrolyte membrane containing poss-based quaternary ammonium salt ionic liquid and preparation method thereof
  • Polymer electrolyte membrane containing poss-based quaternary ammonium salt ionic liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the preparation of POSS-TFSI-IL-SPE-1:

[0030] Weigh 10 parts of polyethylene oxide, 30 parts of poly(propylene fluoride-hexafluoropropylene), 5 parts of propylene carbonate and 2 parts of POSS-TFSI-IL in sequence, and then pour the weighed raw materials into a certain amount of DMF In a round bottom flask, stir at 80°C for 18 hours to completely dissolve the raw material in DMF. Add a certain amount of LiTFSI into the round bottom flask according to the molar ratio of EO:Li=10:1, and continue to stir for 6 hours. Pour the evenly stirred DMF solution into a polytetrafluoroethylene mold and dry it in a vacuum oven at 60°C for 16 hours to finally obtain a solid polymer electrolyte containing a high-temperature-resistant POSS-based quaternary ammonium salt ionic liquid.

[0031] The prepared solid polymer electrolyte and two pieces of stainless steel were assembled into a lithium-ion battery. The ionic conductivity was measured at 1.108×10 in the frequency ...

Embodiment 2

[0032] Embodiment 2: Preparation of POSS-TFSI-IL-SPE-2:

[0033] Weigh 17 parts of polyethylene oxide, 34 parts of poly(propylene fluoride-hexafluoropropylene), 6 parts of propylene carbonate and 4 parts of POSS-TFSI-IL in sequence, and then pour the weighed raw materials into a certain amount of DMF In a round bottom flask, stir at 80°C for 10 hours to completely dissolve the raw material in DMF. Add a certain amount of LiTFSI into the round bottom flask according to the molar ratio of EO:Li=10:1, and continue to stir for 6 hours. Pour the evenly stirred DMF solution into a polytetrafluoroethylene mold and dry it in a vacuum oven at 60°C for 16 hours to finally obtain a solid polymer electrolyte containing a high-temperature-resistant POSS-based quaternary ammonium salt ionic liquid.

[0034] The prepared solid polymer electrolyte and two pieces of stainless steel were assembled into a lithium-ion battery, and the ionic conductivity was measured at 1.8×10 in the frequency ra...

Embodiment 3

[0035] Embodiment 3: Preparation of POSS-TFSI-IL-SPE-3:

[0036] Weigh 17 parts of polyethylene oxide, 34 parts of poly(propylene fluoride-hexafluoropropylene), 12 parts of propylene carbonate and 6 parts of POSS-TFSI-IL in turn, and then pour the weighed raw materials into a certain amount of DMF In a round bottom flask, stir at 80°C for 8 hours to completely dissolve the raw material in DMF. Add a certain amount of LiTFSI into the round bottom flask according to the molar ratio of EO:Li=10:1, and continue to stir for 6 hours. Pour the evenly stirred DMAC solution into a polytetrafluoroethylene mold and dry it in a vacuum oven at 60°C for 16 hours to finally obtain a solid polymer electrolyte containing a high-temperature-resistant POSS-based quaternary ammonium salt ionic liquid.

[0037] The prepared solid polymer electrolyte and two pieces of stainless steel were assembled into a lithium-ion battery. The ion conductivity was measured at 2.2×10 in the frequency range of 1M...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a polymer electrolyte membrane containing POSS-based quaternary ammonium salt ionic liquid and a preparation method thereof. The polymer electrolyte membrane is prepared from the following raw materials in parts by mass: 5 to 25 parts of polyoxyethylene, 10 to 50 parts of vinylidene fluoride-hexafluoropropylene, 0 to 25 parts of plasticizer, 2 to 32 parts of lithium salt, 0.01 to 8 parts of POSS-based ionic liquid. The invention also discloses a preparation method of the polymer electrolyte membrane containing POSS-based quaternary ammonium salt ionic liquid with high-temperature resistance. The polymer electrolyte membrane containing POSS-based quaternary ammonium salt ionic liquid with high-temperature resistance provided by the invention has the following advantages that the safety is high, the preparation method is simple, the production cost is low, the environment pollution is small and the mass production is suitable, the ionic conductivity at room temperature is higher and the electrochemical window is wider.

Description

technical field [0001] The invention relates to a polymer electrolyte membrane containing POSS-based quaternary ammonium salt ionic liquid and a preparation method thereof. Background technique [0002] Due to the advantages of small self-discharge, high energy density, no memory effect, and variable shape, lithium-ion batteries have been widely used in electronic products and various electric vehicles. The liquid electrolyte used in traditional lithium-ion batteries has potential safety hazards of being flammable and easy to leak. Various types of electronic product battery combustion and explosion incidents are endless, so it is imminent to solve the safety problem of lithium-ion batteries. [0003] In recent years, solid polymer electrolytes have aroused widespread interest among researchers due to their high safety, high energy density, no memory effect, variable shape, and good toughness. However, the low ionic conductivity and large interfacial impedance of solid pol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0091Y02E60/10
Inventor 付继芳陆琦施利毅徐玉峰李濛濛陈立亚
Owner SHANGHAI UNIV