Metal conductive material utilized as potassium ion hybrid super capacitor cathode and potassium ion hybrid super capacitor, and preparation method thereof

A technology of supercapacitors and metal composite materials, applied in the manufacture of hybrid capacitor current collectors, hybrid capacitor electrodes, and hybrid/electric double-layer capacitors, etc., can solve the problems of low capacity and energy density, cumbersome production process, environmental pollution, etc. The effect of improving energy density and theoretical specific capacity, simple preparation method and reducing production cost

Active Publication Date: 2017-10-20
REAL POWER IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The secondary battery is a widely used electrochemical device, but the chemical reaction of the secondary battery in the process of charging and discharging will cause irreversible damage to it, which limits its service life, and is easy to cause environmental pollution. Serious waste
Common supercapacitor materials mainly use carbon materials as positive and negative active materials, but at present, the capacity and energy density of this supercapacitor are low, and the negative active materials need to be mixed with binders, conductive agents, etc., and coated on metal On the foil current collector, the production process is relatively cumbersome, and the negative electrode active material and the current collector are easy to fall off, which increases the complexity of the production process and production costs

Method used

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  • Metal conductive material utilized as potassium ion hybrid super capacitor cathode and potassium ion hybrid super capacitor, and preparation method thereof
  • Metal conductive material utilized as potassium ion hybrid super capacitor cathode and potassium ion hybrid super capacitor, and preparation method thereof
  • Metal conductive material utilized as potassium ion hybrid super capacitor cathode and potassium ion hybrid super capacitor, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0085] In a preferred embodiment, the preparation method includes the following steps:

[0086] a) Preparation of negative electrode: use metal, alloy or metal composite material of required size as negative electrode after surface treatment;

[0087] b) Prepare electrolyte: Dissolve potassium salt in solvent and additives, stir thoroughly to obtain electrolyte;

[0088] c) Preparation of diaphragm: a porous polymer film, inorganic porous film or organic / inorganic composite film of the required size is used as the diaphragm;

[0089] d) Preparation of positive electrode: the positive electrode active material, conductive agent and binder are made into positive electrode slurry or positive electrode sheet material; then the positive electrode slurry is coated on the surface of the positive electrode current collector or the positive electrode sheet material is pressed on the positive electrode current collector The surface is dried to obtain a positive electrode of the required size;

...

Embodiment 1

[0095] A potassium ion hybrid super capacitor includes a positive electrode, a negative electrode, an electrolyte, a diaphragm and a shell.

[0096] To prepare the negative electrode of the hybrid supercapacitor: take the tin foil with a thickness of 0.2mm, cut it into a disc with a diameter of 12mm, clean the surface of the tin foil with ethanol, and dry it as a negative electrode for backup;

[0097] Preparation of diaphragm: cut the polypropylene diaphragm into a disc with a diameter of 16mm and use it as a diaphragm for later use;

[0098] Prepare electrolyte: Weigh 0.736g potassium hexafluorophosphate and add 5ml mixed solvent of ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate (the volume ratio of the three is 4:3:2) and 1wt% vinylene carbonate In the ester, stir until the potassium hexafluorophosphate is completely dissolved, then add 10% fluoroethylene carbonate as an additive, and stir well and use it as an electrolyte for use;

[0099] Preparation of hybrid ...

Embodiment 2-10

[0102] In the preparation process of the potassium ion hybrid supercapacitors of Examples 2-10 and Example 1, except for the metal foil used in the preparation of the negative electrode, all other steps and materials used are the same. Mix the potassium ion of Examples 1-10 The energy storage performance of the supercapacitor was tested. The anode materials used in Examples 1-10 and their energy storage performance are shown in Table 1.

[0103] Table 1: Table of performance parameters of potassium ion hybrid supercapacitors of Examples 1-10

[0104]

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Abstract

The invention relates to the field of a super capacitor and particularly provides a metal conductive material utilized as a potassium ion hybrid super capacitor cathode and a potassium ion hybrid super capacitor, and a preparation method thereof. The potassium ion hybrid super capacitor comprises a negative electrode, an isolation film, a positive electrode and an electrolyte, wherein the negative electrodes is metal, alloy or a composite metal material capable of realizing alloying with potassium ions of the electrolyte, the positive electrode comprises a positive electrode material and a positive electrode current collector, a positive electrode active material of the positive electrode material is a carbon material capable of realizing reversible adsorption and desorption of anions of the electrolyte, and the potassium ions are contained in the electrolyte of the hybrid super capacitor. The potassium ion hybrid super capacitor is advantaged in that the metal, the alloy or the composite metal material capable of realizing alloying with the potassium ions of the electrolyte is taken as the negative electrode, the material has the double functions as the negative electrode active material and the negative electrode current collector, not only can the production process of the super capacitor be simplified, production cost is reduced, but also energy density and theoretical specific capacity of the super capacitor are improved.

Description

Technical field [0001] The invention relates to the field of supercapacitors, in particular to a metal conductive material used as a potassium ion hybrid supercapacitor negative electrode and a potassium ion hybrid supercapacitor and a preparation method thereof. Background technique [0002] With the development of modern science and technology, people's demand for energy is increasing, and finding a new type of energy has become an urgent need today. The secondary battery is a widely used electrochemical device, but due to the chemical reaction that occurs during the charging and discharging process of the secondary battery, it will cause irreversible wounds, limit its service life, and easily cause environmental pollution and resources. The waste is serious. Supercapacitors are a new type of energy storage device that uses electrode materials to adsorb positive and negative ions in the electrolyte to form an electric double layer structure for energy storage. The energy stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/06H01G11/30H01G11/68H01G11/84
CPCH01G11/06H01G11/30H01G11/68H01G11/84Y02E60/13
Inventor 唐永炳吴石张帆
Owner REAL POWER IND LTD
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