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Sodium ion hybrid supercapacitor and preparation method thereof

A supercapacitor, sodium ion technology, used in hybrid capacitors, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc. No inferior problems, to achieve the effect of abundant reserves, saving volume and weight, and good safety performance

Active Publication Date: 2020-02-11
REAL POWER IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lithium-ion hybrid supercapacitors have the following defects: the chemical properties of lithium are relatively active and the reserves on the earth are limited, resulting in high lithium prices and certain safety hazards
At the same time, ordinary lithium-ion hybrid supercapacitors cannot combine high power and high energy density, which limits the application of hybrid supercapacitors.

Method used

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  • Sodium ion hybrid supercapacitor and preparation method thereof
  • Sodium ion hybrid supercapacitor and preparation method thereof
  • Sodium ion hybrid supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0124] As a preferred embodiment, the preparation method of sodium ion hybrid supercapacitor includes the following steps:

[0125] a) Preparation of negative electrode: use metal, alloy or metal composite of required size as negative electrode after surface treatment;

[0126] b) Preparation of electrolyte: Dissolve sodium salt electrolyte in organic solvent and / or ionic liquid, stir thoroughly to obtain electrolyte;

[0127] c) Preparation of diaphragm: use a porous polymer film, inorganic porous film or organic / inorganic composite diaphragm of the required size as the diaphragm;

[0128] d) Preparation of positive electrode: the positive electrode material active material, conductive agent and binder are made into positive electrode material slurry or positive electrode sheet material; then the positive electrode material slurry is coated on the surface of the positive electrode current collector or the positive electrode sheet material is pressed on The surface of the positive ele...

Embodiment 1

[0136] A sodium ion hybrid supercapacitor includes a negative electrode, a separator, an electrolyte and a positive electrode.

[0137] Preparation of the negative electrode: take the tin foil with a thickness of 0.2mm, cut it into a disc with a diameter of 12mm, wash the tin foil with ethanol, and dry it as a negative electrode for later use.

[0138] Preparation of the diaphragm: Cut the glass fiber diaphragm into a 16mm diameter disc, and use it as a diaphragm for use after drying.

[0139] Prepare electrolyte: Weigh 0.504g sodium hexafluorophosphate (NaPF6) and add to 3mL ethylene carbonate (EC), dimethyl carbonate (DMC) and methyl ethyl carbonate (EMC) (volume ratio 1:1:1) In the solvent, stir until the sodium hexafluorophosphate is completely dissolved and used as an electrolyte for later use.

[0140] Preparing the positive electrode: add 0.16g carbon nanobelt, 0.02g acetylene black, 0.02g polyvinylidene fluoride to 2mL N-methylpyrrolidone solution, fully grind to obtain a unif...

Embodiment 2

[0143] A sodium ion hybrid supercapacitor includes a negative electrode, a separator, an electrolyte and a positive electrode.

[0144] Preparation of the negative electrode: take the tin foil with a thickness of 0.2mm, cut it into a disc with a diameter of 12mm, wash the tin foil with ethanol, and dry it as a negative electrode for later use.

[0145] Preparation of the diaphragm: Cut the glass fiber diaphragm into a 16mm diameter disc, and use it as a diaphragm for use after drying.

[0146] Prepare electrolyte: Weigh 0.504g sodium hexafluorophosphate (NaPF6) and add to 3mL ethylene carbonate (EC), dimethyl carbonate (DMC) and methyl ethyl carbonate (EMC) (volume ratio 1:1:1) In the solvent, stir until the sodium hexafluorophosphate is completely dissolved and used as an electrolyte for later use.

[0147] Preparing the positive electrode: Weigh 0.16g carbon nanobelt, 0.02g acetylene black, 0.02g polytetrafluoroethylene, add an appropriate amount of absolute ethanol, grind it thorou...

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Abstract

The present invention discloses a sodion mixture supercapacitor and a preparation method thereof, and relates to the electrochemistry energy storage device field. The sodion mixture supercapacitor comprises a cathode, an anode, a diaphragm and an electrolyte. The cathode is metal, alloy or metal compound capable of performing alloying with sodion in electrolyte; and the anode comprises an anode current collector and anode materials, and the active substances of the anode materials can be carbon materials capable of reversibly absorbing and desorbing anion in the electrolyte. The sodion mixture supercapacitor and the preparation method thereof solve the defect that a common lithium ion mixture supercapacitor takes lithium as energy storage medium which is high in cost, harmful and low in energy density, the sodion mixture supercapacitor is a mixture supercapacitor based on the sodion, metal materials capable of alloying with sodium are employed as the cathode, the active materials of the anode comprise carbon materials and are dissolved in non-aqueous solvent with sodium salt as electrolyte, the structure is simple, the cost is low, the power is high and the energy density is high.

Description

Technical field [0001] The present invention relates to the technical field of electrochemical energy storage devices, in particular to a metal conductive material used as a negative electrode of a sodium ion hybrid supercapacitor and a sodium ion hybrid supercapacitor and a preparation method thereof. Background technique [0002] At present, more than 80% of global energy consumption comes from non-renewable energy sources such as coal, oil, and natural gas. The resulting energy shortage and environmental pollution have promoted the use of clean and renewable energy such as solar and wind energy and the use of energy storage devices. Research and development. Among many energy storage devices, lithium-ion batteries have received the most extensive research and are widely used in portable electronic devices such as mobile phones, digital cameras, and notebook computers. Traditional lithium ion batteries use graphite materials as the negative electrode and transition metal oxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/06H01G11/30H01G11/68H01G11/84
CPCH01G11/06H01G11/30H01G11/68H01G11/84Y02E60/13
Inventor 唐永炳王恒王蒙
Owner REAL POWER IND LTD