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Preparation method of eutectic solvent electrolyte for zinc ion hybrid supercapacitor

A technology of supercapacitor and deep eutectic solvent is applied in the field of electrochemical energy storage to achieve the effects of low device price, stable performance, and cheap and easy-to-obtain raw materials.

Active Publication Date: 2021-01-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of Zn dendrites produced by aqueous electrolytes, and proposes a method for preparing a deep eutectic solvent electrolyte for zinc-ion hybrid supercapacitors

Method used

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  • Preparation method of eutectic solvent electrolyte for zinc ion hybrid supercapacitor
  • Preparation method of eutectic solvent electrolyte for zinc ion hybrid supercapacitor
  • Preparation method of eutectic solvent electrolyte for zinc ion hybrid supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Zinc anode preparation: Polish the commercial zinc sheet (about 2mm) to remove the oxide layer on the surface;

[0032] (2) Preparation of porous carbon cathode: the commercial porous carbon (S BET ≈1900m 2 g -1 ) and the binder are uniformly mixed in a mass ratio of 90:10, and then the mixture is rolled into a thin sheet, and the sheet is pressed into a circular electrode sheet with a diameter of 12mm by a press.

[0033] (3) Preparation of deep eutectic solvent electrolyte: mix zinc perchlorate and urea at a molar ratio of 1:2, heat at 90°C for 2 hours, cool to room temperature naturally, and mix zinc perchlorate and 1,2 dichloro The molar ratio of ethane is 1:6. Add 1,2-dichloroethane to the above solution and stir for 30 minutes to form zinc perchlorate / urea / 1,2-dichloroethane deep eutectic solvent electrolyte .

[0034] (4) Zinc-ion hybrid supercapacitors were assembled sequentially by zinc sheets, separators (dropped with deep eutectic solvent electrolyte)...

Embodiment 2

[0036] (1) Zinc anode preparation: Polish the commercial zinc sheet (about 2mm) to remove the oxide layer on the surface;

[0037] (2) Preparation of porous carbon cathode: the commercial porous carbon (S BET ≈1900m 2 g -1 ) and the binder are uniformly mixed in a mass ratio of 90:10, and then the mixture is rolled into a thin sheet, and the sheet is pressed into a circular electrode sheet with a diameter of 12mm by a press.

[0038] (3) Preparation of deep eutectic solvent electrolyte: mix zinc perchlorate and acetamide at a molar ratio of 1:3, heat at 100°C for 2 hours, cool to room temperature naturally, and mix zinc perchlorate and 1,2 di The molar ratio of ethyl chloride is 1:8. Add 1,2-dichloroethane to the above solution and stir for 30 minutes to form a zinc perchlorate / acetamide / 1,2-dichloroethane deep eutectic solvent electrolyte.

[0039] (4) Zinc-ion hybrid supercapacitors were assembled sequentially by zinc sheets, separators (dropped with deep eutectic solven...

Embodiment 3

[0041] (1) Zinc anode preparation: Polish the commercial zinc sheet (about 2mm) to remove the oxide layer on the surface;

[0042] (2) Preparation of porous carbon cathode: the commercial porous carbon (S BET ≈1900m 2 g -1 ) and the binder are uniformly mixed in a mass ratio of 90:10, and then the mixture is rolled into a thin sheet, and the sheet is pressed into a circular electrode sheet with a diameter of 12mm by a press.

[0043] (3) Preparation of deep eutectic solvent electrolyte: zinc perchlorate and N-methylacetamide were mixed evenly at a molar ratio of 1:4, heated at 70°C for 2 hours, and cooled to room temperature naturally, followed by zinc perchlorate and N-methylacetamide The molar ratio of dimethyl carbonate is 1:10. Add dimethyl carbonate to the above solution and stir for 30 minutes to form zinc perchlorate / N-methylacetamide / dimethyl carbonate deep eutectic solvent electrolyte .

[0044] (4) Zinc-ion hybrid supercapacitors were assembled sequentially by zi...

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Abstract

The invention provides a preparation method of a eutectic solvent electrolyte for a zinc ion hybrid supercapacitor, and belongs to the technical field of electrochemical energy storage. The eutectic solvent electrolyte is prepared by uniformly mixing zinc perchlorate and a hydrogen bond donor substance according to a certain molar ratio, carrying out heating reaction and then adding one or two conductive agents. The hydrogen bond donor substance is one or two of urea, N-methyl acetamide and acetamide; and the conductive agent is one or two of 1, 2-dichloroethane and dimethyl carbonate. The electrolyte used in the invention is a eutectic solvent, zinc dendrites are not easy to form, and the conductivity of the electrolyte of the zinc ion hybrid supercapacitor is improved, so that the zinc ion hybrid supercapacitor has excellent electrochemical performance and high energy density. Meanwhile, the electrolyte used in the invention is a non-combustible substance, and has higher safety compared with an organic electrolyte / ionic liquid electrolyte.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and in particular relates to a method for preparing a deep eutectic solvent electrolyte applied to a zinc-ion hybrid supercapacitor. Background technique [0002] Supercapacitors have high power density, excellent cycle stability and high safety. But the energy density of supercapacitors has been unsatisfactory. The hybrid supercapacitor has the advantages of both batteries and supercapacitors, and has battery-type electrodes and capacitive electrodes, which is an important method to improve the energy density of supercapacitors. [0003] Li-ion, Na-ion, and K-ion hybrid supercapacitors have been extensively studied. However, most of these capacitors use organic electrolyte, which has certain potential safety hazards. Recently, Zn-ion hybrid supercapacitors have been favored due to their abundant resources, environmental friendliness, good chemical stability, and high th...

Claims

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Application Information

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IPC IPC(8): H01G11/60H01G11/62H01G11/84
CPCH01G11/60H01G11/62H01G11/84Y02E60/13
Inventor 吕耀辉程荣荣张乐乐马连波田华东
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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