Lithium ion hybrid super capacitor and preparation method thereof

A supercapacitor, lithium-ion technology, applied in the field of lithium-ion hybrid supercapacitor and its preparation, can solve the problems of low theoretical capacity, large labor and equipment investment, limited active sites, etc., to improve energy density and theoretical specific capacity, The effect of reducing production cost and simplifying production process

Inactive Publication Date: 2017-10-03
REAL POWER IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of lithium titanate and metal oxides as negative electrode active materials for hybrid supercapacitors has the disadvantages of complex production processes, serious environmental pollution, and high production costs; and the use of graphite materials as negative electrode materials for hybrid supercapacitors, although its preparation Low cost and large stock, but its low theoretical capacity limits the improvement of the energy density of hybrid supercapacitors
Moreover, commonly used lithium-ion battery electrodes and capacitor electrodes have the disadvantages of limited active sites and low capacity.
In addition, the preparation process of supercapacitors with the above two structures involves steps such as mixing, coating, and rolling of positive and negative active materials. The preparation process is cumbersome and requires a lot of labor and equipment investment.

Method used

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  • Lithium ion hybrid super capacitor and preparation method thereof
  • Lithium ion hybrid super capacitor and preparation method thereof
  • Lithium ion hybrid super capacitor and preparation method thereof

Examples

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preparation example Construction

[0093] In a preferred embodiment, the preparation method comprises the following steps:

[0094] a) Preparing the negative electrode: the metal, alloy or metal composite material of the required size is used as the negative electrode after surface treatment;

[0095] b) Prepare the electrolyte: dissolve the lithium salt in the solvent, and fully stir to obtain the electrolyte;

[0096] c) Preparing a diaphragm: using a porous polymer film, an inorganic porous film or an organic / inorganic composite film of a required size as a diaphragm;

[0097] d) Preparation of positive electrode: 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 surface, dried to obtain a positive electrode of the desir...

Embodiment 1

[0103] A lithium-ion hybrid supercapacitor includes a positive electrode, a negative electrode, an electrolyte, a diaphragm, and a casing.

[0104] Prepare the positive electrode of the capacitor: add 0.8g of activated carbon (AC), 0.1g of conductive carbon black, and 0.1g of polyvinylidene fluoride to 2mL of nitrogen methyl pyrrolidone solvent, grind thoroughly to obtain a uniform slurry; then evenly coat the slurry on aluminum foil The surface was vacuum-dried at 80°C for 12 hours; the dried electrode sheets were cut into discs with a diameter of 10mm, compacted with a hydraulic press (10MPa, 10s), and placed in a glove box as a battery positive electrode for later use;

[0105] Prepare the negative electrode of the capacitor: take an aluminum foil with a thickness of 20 μm, cut it into a disc with a diameter of 12 mm, clean it with ethanol, dry it, and place it in a glove box as the negative electrode for later use;

[0106] Preparation of electrolyte: Weigh 3g of lithium h...

Embodiment 2-12

[0111] Example 2-12 and the lithium ion hybrid supercapacitor preparation process of Example 1 are different except that the metal foil used when preparing the negative electrode is different, and all other steps and materials used are the same. The energy storage performance of the supercapacitor was tested and compared with the performance of Example 1 of the present invention. For the negative electrode materials used in Examples 1-12 and their energy storage performance, see Table 1 for details.

[0112] Table 1: The performance parameter table of the lithium-ion hybrid supercapacitor of embodiment 1-12

[0113]

[0114]

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Abstract

The invention relates to the field of the super capacitor, specifically, provides a lithium ion hybrid super capacitor and a preparation method thereof. The lithium ion hybrid super capacitor comprises a cathode, a diaphragm, an anode and electrolyte; the cathode is the metal, alloy or metal composite material capable of alloying with the lithium ion in the electrolyte; the anode comprises the anode material and the anode collector; the anode active material in the anode material is carbon material capable of reversibly adsorbing and desorbing the anion in the electrolyte; and the lithium ion is existent in the electrolyte of the hybrid super capacitor. The lithium ion hybrid super capacitor disclosed by the invention takes the metal, alloy or metal composite material capable of alloying with the lithium ion in the electrolyte as the cathode, the above mentioned material plays the dual function of the cathode active material and the cathode collector; the production process of the capacitor is simplified, the production cost is lowered, and the energy density and the theoretical specific capacity of the capacitor are further improved.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a lithium-ion hybrid supercapacitor and a preparation method thereof. Background technique [0002] Hybrid supercapacitor is a new type of energy storage system that combines the high energy density of lithium-ion batteries with the high power density of capacitors, excellent cycle life and excellent fast charging performance. It includes a capacitor electrode, a lithium-ion battery electrode, Organic lithium salt electrolyte and diaphragm. Hybrid supercapacitors combine the high specific capacity of lithium-ion batteries and the wide voltage window of organic electrolytes to increase their energy density, and their fast charging performance is reduced due to lithium intercalation and delithiation reactions of lithium-ion battery electrodes, but they are still It has fast charging performance every few minutes. [0003] At present, there are two configurations of hybrid supercapa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/06H01G11/50H01G11/68H01G11/84
CPCY02E60/13H01G11/06H01G11/50H01G11/68H01G11/84
Inventor 唐永炳张松全王蒙
Owner REAL POWER IND LTD
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