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A kind of supercapacitor based on gel polymer electrolyte and preparation method thereof

A gel polymer and supercapacitor technology, applied in the field of energy storage, can solve the problems of easy leakage, volatile liquid electrolyte, flammability, etc., achieve good low temperature tolerance, good electrochemical performance, and expand the scope of application

Active Publication Date: 2022-02-22
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the liquid electrolyte in the traditional supercapacitor is volatile, flammable and easy to leak, so that the supercapacitor will not burn and explode under the condition of overcharge and short circuit, the present invention provides a gel-based polymer The all-solid-state supercapacitor of material electrolyte and preparation method thereof, use flame retardant gel polymer electrolyte; Utilize the active P-H bond of flame retardant (DOPO) to graft on the polymer chain to obtain flame retardant gel polymer electrolyte, then use for the preparation of supercapacitors

Method used

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  • A kind of supercapacitor based on gel polymer electrolyte and preparation method thereof
  • A kind of supercapacitor based on gel polymer electrolyte and preparation method thereof
  • A kind of supercapacitor based on gel polymer electrolyte and preparation method thereof

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preparation example Construction

[0061] The preparation method of the flame retardant gel polymer electrolyte according to the present invention includes the following steps:

[0062] 1) Add acrylic hexafluorobutyate (HFBA) and methyl methacrylate (HEMA) to the solvent. The solvent is DMF, acetonitrile, DMSO and other organic solvents, and the solvent is preferably 50% -75%, and the solvent accounts for 50% -75% of the total weight of 50% to 75% by the total weight of the monomer and the solvent. The amount of solvent is used to have a relatively large effect on the conductivity. In step 1), the molar ratio of HFBA and HEMA is greater than 2: 1; its ratio can be high or even near infinity, such as HFBA and HEMA's molar ratio 1: 0; more preferred, HFBA and HEMA molar ratio ( 2 ~ 10): 1; More preferably, HFBA and HEMA molar ratios are 4 to 10: 1 (including 4: 1, 6: 1, 8: 1, 10: 1). More preferably, the molar ratio of HFBA and HEMA is 8: 1.

[0063] 2) A solution formed by the flame retardant, polyethylene glycol di...

Embodiment 1

[0065] Example 1 Preparation of gel polymer electrolyte

[0066] HFBA (acrylate hexafluorol) and HEMA (methyl methacrylate) were added to the DMF solvent in the ratio of molar ratio 6: 1 (the mass ratio of the monomer and the solvent was 4: 6). Then, the total mass of the monomer is 1% by weight of 9,10-dihydro-9-oxidation (DOPO), with respect to the total mass of the monomer with respect to the total mass of the monomer with respect to the total mass of the monomer. 1.5% by weight of polyethylene glycol diacrylate (PEGDA) and 2.5 mol L -1 Litfsi (4.306 g) was added to the above solution. Finally, the solution was transferred to the mold after the addition initiator (AIBN with a total of 2% of the total mass of the monomer). After 12 hours at 60 ° C, the resulting gel polymer electrolyte (abbreviated as poly (Hfbax-co-hemay) was obtained.

Embodiment 2-8

[0067] Example 2-8 Preparation of gel polymer electrolyte

[0068] HFBAs and HEMAs added to 20 ml of glass bottles will have different molar ratios (1: 0, 10: 1, 8: 1, 6: 1, 4: 1, 2: 1). The amount of solvent is used between 50% and 75%. Then, the DOPO (with respect to the total mass of the monomer is 1% by weight), and the total mass of the monomer is 1.5% by weight) and 0 to 3 mol L. -1 Litfsi is added to the above solution. Litfsi concentration is controlled in 0.5, 1, 1.5, 2, 2.5, 3mol L, respectively. -1 . Finally, the solution was transferred to the mold after the addition initiator (AIBN with a total of 2% of the total mass of the monomer). After 10-14 hours at 50-80 ° C, the resulting gel polymer electrolyte (abbreviated as poly (Hfbax-co-hemay), wherein X and Y represent HFBA and HEMA molar ratio. Reaction conditions Table 1.

[0069]Table 1 Preparation parameters of gel polymer electrolyte

[0070]

[0071] In a particular embodiment of the invention, the solvent, flam...

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Abstract

The invention belongs to the field of energy storage, and relates to a high-performance all-solid-state supercapacitor based on a gel polymer electrolyte and a preparation method thereof. The supercapacitor includes electrodes and a gel polymer electrolyte between the electrodes. The flame retardant gel polymer electrolyte, including gel polymer and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in ionic form Exist in gel polymer. Poly(HFBA 8 ‑co‑HEMA 1 ) Electrolyte-based SC electrodes retain 76% of their mass specific capacitance after 8000 cycles; gel-based SCs remain essentially unchanged under multiple bending cycles. Gel-based SCs have good low-temperature tolerance and can function well in the temperature range from ‑20 °C to 60 °C. The multiple advantages of gel electrolytes expand their applications in ion conductors and energy storage devices, and solve the shortcomings of traditional liquid electrolytes due to their volatility, flammability, and easy leakage.

Description

Technical field [0001] The present invention belongs to the field of energy storage, involving a full solid supercapacitor based on gel polymer electrolyte and a preparation method thereof. In particular, a full solid supercapacitor based on flame retardant, high conductivity and low temperature gel polymer electrolyte and its preparation method thereof Background technique [0002] The development of electric vehicles and portable wearable electronic devices makes the demand for energy storage devices such as lithium-ion batteries and supercapacitors. [0003] The performance of supercapacitor electrode materials and electrolytes is a decisive factor affecting the performance of supercapacitor. Currently, most of the electrolytes used in the energy storage device are combinations of organic liquids (organic esters or ethers) and lithium salts. One of the most common selection of organic liquids is a mixture of ethylene carbonate and linear carbonate (diethyl carbonate or dimethy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56H01G11/86H01G11/84
CPCH01G11/56H01G11/86H01G11/84Y02E60/13
Inventor 刘利彬王济君班青盖利刚李学林姜海辉
Owner QILU UNIV OF TECH
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