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Aqueous hybrid super capacitor

A technology of hybrid supercapacitors and supercapacitors, which is applied in the field of electrochemical energy storage, can solve the problems of short service life of hybrid supercapacitors, and achieve the effects of not being able to last long, being easy to connect in parallel and in series, and having low power costs

Active Publication Date: 2021-11-19
黄潮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the problem of short service life of the zinc negative electrode water system hybrid supercapacitor, and provide a long service life, low cost, high power density, relatively high energy density, strong deep charge and discharge capacity, and large-scale energy storage and high power energy storage. Pollution-free hybrid supercapacitor

Method used

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  • Aqueous hybrid super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Supercapacitor positive electrode 1 preparation: the active material is activated carbon with high iodine value, the conductive agent is acetylene black, the binder is polyvinylidene fluoride (PVDF), and N-methylpyrrolidone (NMP) is used as the PVDF solvent; activated carbon: acetylene Black: polyvinylidene fluoride = 80:10:10 mass ratio mixing, adding NMP and stirring to form a membrane-making slurry; coating the mixed slurry on the foamed nickel current collector, hot pressing at 160 degrees Celsius and 10MPa pressure, and drying to form an electrode.

[0063] Gas-evolving electrode 2: Nickel foam is clamped on 80-mesh 304 stainless steel mesh to form a gas-evolving electrode with both oxygen-evolving and hydrogen-evolving activities; zinc negative electrode current collector 4: a brass sheet with a thickness of 0.1 mm; electrolyte 6 is a brass sheet containing 1.5% zinc oxide, 30% potassium hydroxide in water (mass concentration).

[0064] Hybrid supercapacitors asse...

Embodiment 2

[0072] Continue the measurement with the hybrid supercapacitor of Example 1, only change the cycle voltage and recovery charging current conditions, and recalculate the number of cycles.

[0073] Supercapacitor positive electrode 1 and zinc negative electrode 3 charge and discharge cycle: 125 mA / cm 2 Constant current charging to 1.45 volts, 125 mA / cm 2 Constant current discharge to 0.45 volts, repeated 1000 times.

[0074] Zinc negative electrode 3 recovery: use gas-evolving electrode 2 to connect to the positive electrode of the battery tester, and zinc negative electrode 3 to connect to the negative electrode of the battery tester to charge; 15 mA / cm 2 Charge at a constant current for 1 hour to electrodeposit metal zinc on the zinc negative electrode 3 to restore capacity.

[0075] Every 14 hours of working of the hybrid supercapacitor, turn off the battery tester and the electrolyte 12 and let it stand for 10 hours before continuing to work; every time about 1000 charging...

Embodiment 3

[0077] Supercapacitor positive electrode 1 preparation: the nickel foam current collector in the preparation of the supercapacitor positive electrode 1 in Example 1 was changed to a 350-mesh 304 stainless steel current collector, and the others were the same.

[0078] Gas-evolving electrode 2: 80-mesh 304 stainless steel mesh; negative collector 4: a brass sheet with a thickness of 0.1 mm; electrolyte 6 is an aqueous solution of 6 mol / L potassium hydroxide containing saturated zinc oxide, containing 100 ppm indium sulfate.

[0079] The assembly of the hybrid supercapacitor is the same as in Example 1.

[0080] Preparation of zinc negative electrode 3: connect the positive electrode of the battery tester with the gas-evolving electrode 2, and connect the negative electrode with the zinc negative electrode current collector 4; 20mA / cm 2 Constant current charging for 4 hours.

[0081] Supercapacitor positive electrode 1 and zinc negative electrode 3 charge and discharge cycle: 1...

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Abstract

An aqueous hybrid super capacitor is comprised of a super capacitor positive electrode, a gas generating electrode which has oxygen generating activity, and a zinc negative electrode, separated in an aqueous electrolyte with pH value above 2.5; use the super capacitor positive electrode and the zinc negative electrode to perform cycle of charging and discharging; use the gas generating electrode and the zinc negative electrode to recover capacity of the zinc negative electrode and recondition the zinc negative electrode; relating to the electrochemical energy storage area, it has characteristics of extremely long cycle life, low cost, high power density, enduring deep charging and discharging, easily assembled and connected, being suitable for large scale energy storage and high power energy storage.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage, in particular to a water system hybrid supercapacitor. Background technique [0002] In areas such as energy and transportation, energy storage technology is becoming more and more important. Renewable energy such as wind energy and solar energy is intermittent and random, requiring economical and durable energy storage technology to be applied on a large scale; grid power consumption fluctuates greatly, and if there is an economical and durable energy storage technology to balance peaks and valleys, the installed capacity can be greatly reduced; Hybrid power and car start-stop systems will be difficult to popularize without economical and durable high-power energy storage technology. Unfortunately, the existing energy storage technologies are difficult to popularize due to the limitations of cost, lifetime and scale. [0003] Electrochemical energy storage technology mainly uses s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/04H01G11/68H01G11/30
CPCH01G11/08H01G11/04H01G11/30H01G11/68H01G11/60Y02E60/13Y02T10/70Y02E60/10H01G11/58H01M10/26H01M10/30
Inventor 黄潮
Owner 黄潮
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