A kind of high and low temperature resistant gel electrolyte supercapacitor and preparation method thereof

A gel electrolyte, supercapacitor technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of low electrochemical window, limited use range, narrow use temperature range, etc. High conductivity, reduced interface resistance, and stable performance

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional supercapacitors of this type have many problems such as low electrochemical window and narrow operating temperature range, which greatly limit their application range.

Method used

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  • A kind of high and low temperature resistant gel electrolyte supercapacitor and preparation method thereof
  • A kind of high and low temperature resistant gel electrolyte supercapacitor and preparation method thereof
  • A kind of high and low temperature resistant gel electrolyte supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of a high and low temperature resistant gel electrolyte supercapacitor, comprising the following steps:

[0040] 1. Preparation of pilot hole hydrogel: first mix 0.25g of acrylamide and 0.75g of water, stir in a glass bottle, add 0.001g of N,N-methylenebisacrylamide, and freeze at low temperature after 20min Guide, add 0.0002g photoinitiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, put it in the environment of -20 ℃ refrigerator for ultraviolet light polymerization, the hydrogel guide structure is as follows figure 1 As shown, it is a guided uniform porous structure.

[0041] 2. Preparation of airgel with guide holes: take the hydrogel with the above structure and freeze-dry for 72 hours.

[0042] 3. Preparation of high-concentration hydrogel: soak the prepared airgel in 5M LiTFSI for 2 hours.

[0043] 4. 6.306g of melamine (0.05mol), 10mL of formaldehyde solution (37%) and 0.021g of hexamethylenetetramine were dissolved in water (120mL...

Embodiment 2

[0052] A preparation method of a high and low temperature resistant gel electrolyte supercapacitor, comprising the following steps:

[0053] 1. Preparation of pilot hole hydrogel: first, 0.25 g of 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1 -Mix the sulfonic acid inner salt with 0.75g water, put it in a glass bottle for stirring, add 0.001g polyethylene glycol diacrylate, conduct low temperature freezing after 20min, add 0.0005g photoinitiator α-diethoxy Acetophenone was placed in a refrigerator at -20°C for ultraviolet light polymerization.

[0054] 2. Preparation of airgel with guide holes: the hydrogel with the above structure was freeze-dried for 24 hours.

[0055] 3. Preparation of high-concentration hydrogel: soak the prepared airgel in 5M LiTFSI for 5 hours.

[0056] 4. 6.306g of melamine (0.05mol), 10mL of formaldehyde solution (37%) and 0.021g of hexamethylenetetramine were dissolved in water (120mL), and the mixture was heated to 65°C under...

Embodiment 3

[0060] A preparation method of a high and low temperature resistant gel electrolyte supercapacitor, comprising the following steps:

[0061] 1. Preparation of pilot hole hydrogel: first mix 0.25g polyethylene glycol dimethacrylate with 0.75g water, stir in a glass bottle, add 0.001g polyethylene glycol dimethacrylate, 20min Afterwards, conduct low-temperature freezing guidance, add 0.0008 g of photoinitiator α-diethoxyacetophenone, and place in a -20° C. refrigerator environment for ultraviolet light polymerization.

[0062] 2. Preparation of airgel with guide holes: take the hydrogel with the above structure and freeze-dry it for 1 hour.

[0063] 3. Preparation of high-concentration hydrogel: Soak the prepared airgel in 5M LiTFSI for 1 hour.

[0064] 4. 6.306g of melamine (0.05mol), 10mL of formaldehyde solution (37%) and 0.021g of hexamethylenetetramine were dissolved in water (120mL), and the mixture was heated to 65°C under stirring to form a transparent solution; after t...

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Abstract

The invention relates to a high and low temperature resistant gel electrolyte supercapacitor and a preparation method thereof. The specific steps include: uniformly mixing the precursors, and then sequentially performing low-temperature orientation and ultraviolet-induced polymerization to prepare a hydrogel with an orientation structure, and then Freeze-drying can prepare aerogels with a tree-pore structure, and finally soak to obtain high-concentration inorganic salts to obtain hydrogels again, and finally assemble self-made working electrodes with the above-mentioned gels in a sandwich structure to obtain symmetric supercapacitors. Compared with the prior art, the electron-ion conductivity of the electrode-electrolyte interface of the present invention is stronger, which promotes the fusion of the electrode-electrolyte interface and reduces the interface resistance; it can withstand wider ambient temperature; higher voltage working window and energy Specific capacitance value.

Description

technical field [0001] The invention relates to the field of polymer gel material preparation and new energy materials, in particular to a high and low temperature resistant gel electrolyte supercapacitor and a preparation method thereof. Background technique [0002] A supercapacitor, also known as an electrochemical double layer capacitor, is an electrochemical energy storage device with fast charge and discharge capabilities. Supercapacitors are named for their ultra-high energy density compared to conventional capacitors. Although the energy storage density of supercapacitors is much higher than that of traditional capacitors, it is still lower than that of ordinary batteries, and it is difficult to withstand long-term discharge, which is the main reason for the limited application of supercapacitors. The energy density of a supercapacitor is mainly affected by factors such as the specific capacity of the electrode material, the operating voltage, and the structure of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/56H01G11/24H01G11/30H01G11/34
CPCY02E60/13
Inventor 周杰吴楚乌东北王启刚
Owner TONGJI UNIV
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