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Preparation method and application of gel polymer electrolyte for high-performance all-solid-state supercapacitor

A gel polymer, electrolyte technology, applied in the field of energy storage, can solve the problems of volatile, flammable, easy to leak, etc., and achieve the effects of good flame retardant ability, high electrical conductivity, and good mechanical properties

Active Publication Date: 2021-06-25
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the traditional liquid electrolyte is volatile, flammable and easy to leak, so that the energy storage device will not burn and explode under the condition of overcharge and short circuit, the present invention provides a kind of flame retardant gel polymer The preparation method of the electrolyte uses the active P-H bond of the flame retardant (DOPO) to graft onto the polymer chain to prepare a flame-retardant gel polymer electrolyte

Method used

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  • Preparation method and application of gel polymer electrolyte for high-performance all-solid-state supercapacitor
  • Preparation method and application of gel polymer electrolyte for high-performance all-solid-state supercapacitor
  • Preparation method and application of gel polymer electrolyte for high-performance all-solid-state supercapacitor

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Effect test

Embodiment 1

[0052] The preparation of embodiment 1 gel polymer electrolyte

[0053] HFBA (hexafluorobutyl acrylate) and HEMA (hydroxyethyl methacrylate) were added to the DMF solvent at a molar ratio of 6:1 (the mass ratio of monomer to solvent was 4:6). Then, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) at 1% by weight relative to the total mass of the monomers was added under stirring, relative to the total mass of the monomers 1.5% by weight polyethylene glycol diacrylate (PEGDA) and 2.5mol L -1 LiTFSI (4.306g) was added to the above solution. Finally, after addition of the initiator (2% AIBN relative to the total mass of monomers), the solution was transferred to a mold. After polymerization at 60 °C for 12 h, the resulting gel polymer electrolyte (abbreviated as poly(HFBAx-co-HEMAy) was obtained.

Embodiment 2-8

[0054] Preparation of Example 2-8 Gel Polymer Electrolyte

[0055] HFBA and HEMA with different molar ratios (1:0, 10:1, 8:1, 6:1, 4:1, 2:1) were added to a 20 mL glass vial. The solvent consumption is preferably between 50%-75%. Then, DOPO (1% by weight relative to the total mass of the monomer), PEGDA (1.5% by weight relative to the total mass of the monomer) and 0-3mol L -1 LiTFSI was added to the above solution. LiTFSI concentrations were controlled at 0.5, 1, 1.5, 2, 2.5, 3mol L -1 . Finally, after addition of the initiator (2% AIBN relative to the total mass of monomers), the solution was transferred to a mold. After polymerization at 50–80°C for 10–14 hours, the resulting gel polymer electrolyte (abbreviated as poly(HFBAx-co-HEMAy), where x and y represent the molar ratios of HFBA and HEMA, respectively, was obtained. For the reaction conditions, see Table 1.

[0056] Table 1 Preparation parameters of gel polymer electrolyte

[0057]

[0058] In a specific emb...

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Abstract

The invention belongs to the field of energy storage, and relates to a preparation method and application of a gel polymer electrolyte of a high-performance all-solid-state supercapacitor. The preparation method comprises the following steps: adding hexafluorobutyl acrylate (HFBA) and hydroxyethyl methylacrylate (HEMA) into a solvent, adding a flame retardant, polyethylene glycol diacrylate (PEGDA) and lithium bis (trifluoromethanesulfonyl) imide (LiTFSI), adding an initiator, and polymerizing at 50-80 DEG C for 10-14 hours to prepare the flame-retardant gel polymer electrolyte. According to the invention, the gel electrolyte has good ionic conductivity of 4 mS cm<-1> and good flame retardant capacity at 20 DEG C, and the mechanical strength of the gel electrolyte is adjusted within the range of the maximum stress of 28 KPa and the maximum strain of 305%; the gel-based SC has good resistance to low temperatures and can operate normally in a temperature range of -20 DEG C to 60 DEG C; and the multiple advantages of the gel electrolyte expand the application of the gel electrolyte in ion conductors and energy storage equipment, and overcome the defects that the traditional liquid electrolyte is easy to volatilize, inflammable, easy to leak and the like.

Description

technical field [0001] The invention belongs to the field of energy storage, and relates to a preparation method and application of a gel polymer electrolyte for a high-performance all-solid-state supercapacitor. In particular, it relates to a preparation method and application of a flame-retardant, high-conductivity and low-temperature-resistant gel polymer electrolyte for high-performance all-solid-state supercapacitors. Background technique [0002] With the rapid development of electric vehicles and portable wearable electronics, the demand for energy storage devices such as lithium-ion batteries and supercapacitors is growing. Electrolytes, as an important component of energy storage devices, have attracted great attention. Currently, most electrolytes used in energy storage devices are combinations of organic liquids (organic esters or ethers) and lithium salts. One of the most common choices for organic liquids is a mixture of ethylene carbonate and a linear carbona...

Claims

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Application Information

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IPC IPC(8): H01G11/56
CPCH01G11/56Y02E60/13
Inventor 刘利彬王济君班青盖利刚李学林姜海辉绪玉萍刘越
Owner QILU UNIV OF TECH
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