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A method for preparing ionic liquid gel electrolyte by self-initiated polymerization of semiconductor

A technology of gel electrolyte and ionic liquid, applied in hybrid capacitor electrolyte, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as limiting the application of ionic liquid gel, reducing electrochemical performance, and difficulty in synthesizing ionic liquid gel , to achieve the effect of maintaining electrochemical performance, enhancing mechanical strength and good controllability

Active Publication Date: 2018-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the residue of traditional initiators (such as benzoyl peroxide) in the system often leads to the reduction of electrochemical performance; and the cationic groups of ionic liquids have obvious electron-withdrawing properties, that is, ionic liquids can quench free radicals and destroy polymerization. process, therefore, it is difficult to synthesize ionic liquid gels (J.Am.Chem.Soc., 2005, 127, 4976-4983; Chem.Mater., 2004, 16, 3091-3097)
These disadvantages largely limit the application of ionic liquid gels prepared by the above method in the field of electrochemistry

Method used

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  • A method for preparing ionic liquid gel electrolyte by self-initiated polymerization of semiconductor
  • A method for preparing ionic liquid gel electrolyte by self-initiated polymerization of semiconductor
  • A method for preparing ionic liquid gel electrolyte by self-initiated polymerization of semiconductor

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Experimental program
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Effect test

Embodiment 1

[0031] Take ionic liquid (BMIMPF 6 ), titanium dioxide nanoparticles, DMAA (containing 3% MBA) according to the mass ratio of 89:1:10 magnetic stirring for half an hour and mix evenly, under the condition of 25 ℃, add ultraviolet light irradiation, the light intensity is about 25mW / cm 2 , reacted for 10min to prepare the ionic liquid gel electrolyte. The conductivity of the obtained ionic liquid gel electrolyte is 0.84mS / cm, with a specific surface area of ​​2100m 2 / g of activated carbon is used as an active material to assemble an electric double layer supercapacitor, and the specific capacity obtained at a current density of 1A / g is 128F / g.

[0032] Such as figure 1 As shown, according to the scanning signal of EPR, it can be explained that monomeric carbon growth free radicals derived from the electrons and holes generated by the excitation of the semiconductor are generated in the system. figure 2 As shown, the ionic liquid gel electrolyte prepared in this example has...

Embodiment 2

[0035] Take ionic liquid (BMIMPF 6 ), tin oxide nanoparticles, DMAA (containing 3% MBA) according to the mass ratio of 89:1:10 magnetic stirring for half an hour to mix evenly, under the condition of 25 ℃, add ultraviolet light irradiation, the light intensity is about 25mW / cm 2, and reacted for 40 minutes to prepare the ionic liquid gel electrolyte. The conductivity of the obtained ionic liquid gel electrolyte is 0.83mS / cm, with a specific surface area of ​​2100m 2 / g activated carbon is used as an active material to assemble an electric double layer supercapacitor, and the specific capacity obtained at a current density of 1A / g is 127F / g.

Embodiment 3

[0037] Take ionic liquid (BMIMPF 6 ), titanium dioxide nanoparticles, methyl methacrylate (containing 3% MBA) according to the mass ratio of 89:1:10 magnetic stirring for half an hour and mix evenly, and under the condition of 25 ℃, add ultraviolet light irradiation, the light intensity is about 25mW / cm 2 , and reacted for 40 minutes to prepare the ionic liquid gel electrolyte. The conductivity of the obtained ionic liquid gel electrolyte is 0.86mS / cm, and the specific surface area is 2100mS 2 / g of activated carbon is used as an active material to assemble an electric double layer supercapacitor, and the specific capacity obtained at a current density of 1A / g is 128F / g.

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Abstract

The invention relates to a method of preparing an ionic liquid gel electrolyte by a semiconductor through ultraviolet initiated polymerization. The semiconductor and a monomer are added to the ionic liquid, uniform mixing is carried out, the semiconductor generates electrons and holes through ultraviolet irradiation, free radicals are formed, the monomer is thus initiated to be subjected to free radical polymerization, and an ionic liquid gel electrolyte with a three-dimensional network structure is generated. Compared with the prior art, the method of the invention has the advantages that the preparation process is simple; the reaction condition is mild; the prepared ionic liquid gel electrolyte is characterized in high mechanical strength, good thermal stability, large polymer skeleton pore, high conductivity and the like, and important promotion significance is achieved in the fields of a super capacitor, a lithium battery, a solar cell, a flexible wearable device and the like.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a method for gel electrolyte, in particular to a method for preparing ionic liquid gel electrolyte by ultraviolet polymerization induced by a semiconductor. Background technique [0002] Ionic liquids have many excellent properties, such as high thermal stability, almost no vapor pressure, wide electrochemical window, and high conductivity. They are widely used in the fields of biology, catalysis, synthesis, and electrochemistry, especially as electrolytes for lithium Batteries, supercapacitors, fuel cells, etc. However, although ionic liquids as electrolytes can solve the problem of volatilization of traditional organic electrolytes, as liquid electrolytes, there are still problems of electrolyte leakage and packaging technology. [0003] Ionic liquid gel is a material with a three-dimensional network polymer molecular chain structure that can absorb and retain a large amount ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56H01G11/84
CPCY02E60/13
Inventor 王启刚刘新华
Owner TONGJI UNIV