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Electrolyte and its supercapacitor

A supercapacitor and electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems of complex preparation, high cost, and restrictions on large-scale promotion, and achieve the effects of increasing the low-temperature working area, preventing low-temperature coagulation, and broadening the working temperature range.

Inactive Publication Date: 2017-12-22
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Electrolytes for supercapacitors are generally divided into two categories: organic systems and water systems. The research on organic supercapacitors at home and abroad is mainly complicated and costly.
Water-based supercapacitors are simple to prepare and low in cost, but their large-scale promotion is limited by their low temperature characteristics. The electrolyte is easy to freeze below the freezing point, making the supercapacitor lose its function.

Method used

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  • Electrolyte and its supercapacitor
  • Electrolyte and its supercapacitor
  • Electrolyte and its supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of electrolyte solution: Dissolve 5.85g of sodium chloride into 90ml of water, add 15ml of hydrazine hydrate, and stir the solution sufficiently to prepare an electrolyte solution.

[0019] The preparation of the supercapacitor: first dissolve the polyvinylidene fluoride of 7% by mass in N-2 methylpyrrolidone, stir until the polyvinylidene fluoride is completely dissolved, then mix the activated carbon with the mass percentage of 85%, and the mass percentage of 4% KS-6 conductive carbon powder and 4% conductive acetylene black were poured into the slurry and stirred. After 12 hours of high-speed stirring, the carbon powder was completely dissolved and the slurry was in the form of black colloid. The material is evenly coated on the aluminum foil current collector, and the coating thickness is controlled at 200 μm. After that, the coated aluminum foil is placed flat in a drying oven, and baked at 80 ° C for 5 minutes to volatilize all the N-2 methylpyrrolidone...

Embodiment 2

[0024] Preparation of electrolyte: Dissolve 4 g of sodium chloride and 5.45 g of ammonium chloride into 95 ml of water, add 15 ml of hydrazine hydrate, and stir the solution thoroughly to prepare an electrolyte.

[0025] The preparation and electrical performance test process of the supercapacitor of the present embodiment are identical with embodiment one, and test result is as follows:

[0026] temperature (°C)

Embodiment 3

[0028] Preparation of electrolyte: Dissolve 4 g of sodium chloride and 5.45 g of ammonium chloride into 95 ml of water, add 5.0 ml of hydrazine hydrate, and stir the solution thoroughly to prepare an electrolyte.

[0029] The preparation and electrical performance test process of the supercapacitor of the present embodiment are identical with embodiment one, and test result is as follows:

[0030] temperature (°C)

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Abstract

One aspect of the present invention provides an electrolyte, the components of which include: hydrazine hydrate, water and inorganic salts. The second aspect of the present invention provides a supercapacitor, which includes: a positive electrode, a negative electrode, a diaphragm between the positive and negative electrodes, and an electrolyte; the electrolyte components include hydrazine hydrate, water and inorganic salts. By adding hydrazine hydrate and inorganic salts with low freezing points, the electrolyte can be effectively prevented from freezing at low temperature. It can be used as an electrolyte in supercapacitors to broaden the working temperature range of supercapacitors, especially in low temperature regions.

Description

technical field [0001] The invention relates to electrochemical energy storage, in particular to an electrolytic solution and a supercapacitor thereof. Background technique [0002] Supercapacitor is a new type of energy storage device whose performance is between ordinary capacitors and chemical batteries. It has relatively high energy density, high instantaneous charge and discharge power, and long service life. It is widely used in hybrid vehicles, electric vehicles Automobiles, rail transit, solar and wind power generation and other fields that require instantaneous release, storage or recovery of energy. [0003] Electrolytes for supercapacitors are generally divided into two categories: organic systems and aqueous systems. At home and abroad, the research on organic supercapacitors is mainly concentrated, and its preparation is complicated and costly. Water-based supercapacitors are simple to prepare and low in cost, but their large-scale promotion is limited by their...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/64
CPCY02E60/13
Inventor 石大为杨昌平高鹏徐玲芳王瑞龙宫华扬
Owner HUBEI UNIV