Amphoteric gel polymer electrolyte with good performance and preparation and application thereof

An amphoteric gel, good performance technology, applied in the field of understanding of ion transport in amphoteric gel polymer electrolytes, can solve problems such as difficulty in preparing new performance zwitterionic gel electrolytes, and achieve easy promotion, high conductivity, and low The effect of interface resistance

Active Publication Date: 2019-06-25
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the inventors found that it is still difficult to prepare novel amphoteric ion gel electrolytes with excellent performance.

Method used

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  • Amphoteric gel polymer electrolyte with good performance and preparation and application thereof
  • Amphoteric gel polymer electrolyte with good performance and preparation and application thereof
  • Amphoteric gel polymer electrolyte with good performance and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Experimental part

[0045] Material

[0046] Acrylic acid (AA) and azobisisobutylamidine hydrochloride (AIBA) were purchased from Aladdin. Acryloyloxyethyltrimethylammonium chloride (DAC) was purchased from Bailingwei Technology Co., Ltd. Carbon black was purchased from Alfa Aesar. Lithium chloride (LiCl), polyvinyl alcohol type 1799 (PVA), activated carbon, polyvinylidene fluoride (PVDF), and N-methylpyrrolidone were purchased from McLean. Nickel was purchased from MTI Corporation.

[0047] Preparation of P(AA-DAC) Electrolyte

[0048] The P(AA-DAC) electrolyte is a foam prepared by radical polymerization of AA and DAC monomers. AA, DAC and distilled water (12mL) with a total mass of 4g were added to 20ml glass bottles respectively, and the molar ratios of the two monomers were controlled at 1:1, 1:2, 1:4, 2:1 and 4: 1. Different concentrations of LiCl were added to the mixed solution. After the mixed solution was stirred in an ice bath for 1.5 hours, 0.04 g of...

Embodiment 2

[0098] DFT calculation part:

[0099] The binding energy Eb of ion and AA, DAC segment is determined by the formula:

[0100] E. b 1=E(LiCl)-E(Cl - )-E(Li + );E b 2=E(AA+Li + )-E(AA)-E(Li + );

[0101] E. b 3=E(AA+DAC)-E(AA)-E(DAC); E b 4=E(AA+Cl - )-E(AA)-E(Cl - )

[0102] Among them, Eb1-4 are the binding energies of two fragments in the polymer and four cases of two ions, respectively. E(LiCl) is the energy of LiCl, and E(AA+DAC) is the total energy of the two stages. E(AA+Li+)E(AA+Cl-) is the total energy of the segmented ions in the polymer. E(Cl-)E(Li+)E(AA)E(DAC) are the energies of the two ions and the two segments, respectively.

[0103] Structural formula such as Figure 12

[0104] Cartesian Coordination for the optimized structures of DAC-COO

[0105] E(DAC-COO)=-493.6089x10 3 Kcal / mol

[0106]

[0107] Charge scheme of DAC-COO

[0108]

[0109] Structural formula such as Figure 13

[0110] Cartesian Coordination for the optimized stru...

Embodiment 3

[0124] The preparation of the P (AA-DAC) electrolyte, the method for assembling the supercapacitor, and the subsequent detection method are the same as in Example 1, except that the LiPF 6 Instead of LiCl, the test results show that: in 0.5mol L -1 Li PF 6 concentration, P(AA 1 -DAC 2 ) and P(AA 1 -DAC 4 ) conductivity reaches ~6.9mS cm -1 .

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Abstract

The invention relates to an amphoteric gel polymer electrolyte with good performance and preparation and application thereof. A series of zwitterionic gel electrolytes are prepared in the invention. An amphoteric gel electrolyte with high mechanical strength and a conductivity of 8.2 mScm-1 can be prepared by controlling the ratio of monomers and the concentration of lithium salt. The interfacialresistance between an electrode and the electrolyte is greatly reduced by immersing an AC electrode into a monomer solution for in-situ polymerization. The AC electrode with the in-situ polymerized electrolyte has a large area capacitance of 297mF cm-2 at a current density of 0.8 mA cm-2 and can remain 70% after 7000 cyclic tests. Remarkably, the combined solid capacitor not only have an area energy density up to 6.6 mWh cm-2 and a power density up to 2.4 W cm-2, but also have a good self-healing property. The work of the invention provides a new idea for the field of gel electrolytes, and obtains a zwitterionic gel electrolyte having great application potential in energy storage equipment.

Description

technical field [0001] The invention belongs to the field of supercapacitor preparation, and in particular relates to the understanding of ion transport in amphoteric gel polymer electrolytes with good performance. Background technique [0002] Electrolyte can affect the specific capacitance, service life and safety performance of energy storage devices (capacitors, batteries), and even play a decisive role. It is an important factor affecting the electrochemical properties of energy storage devices. Traditional liquid electrolytes are widely used due to their facile preparation and high conductivity. However, liquid electrolytes still have many insurmountable shortcomings, such as easy leakage, high requirements for assembly, and difficulty in long-distance transportation. To solve these problems, solid polymer electrolytes and gel polymer electrolytes have been developed. Although solid polymer electrolytes can solve the problems of easy leakage and assembly, the conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56H01G11/84H01G11/86C08F220/06C08F220/34C08F2/44
CPCY02E60/13
Inventor 刘利彬李冬
Owner QILU UNIV OF TECH
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