Electrode for supercapacitor and preparation method and application thereof

A technology for supercapacitors and electrodes, which is applied in the field of electrodes for supercapacitors and their preparation, can solve the problems of low energy density and difficult to satisfy, and achieve the effects of obvious effects, simple methods, and flexible and controllable preparation methods.

Inactive Publication Date: 2020-04-03
杭州阳名新能源设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its energy density is lower than that of secondary batteries, and it is difficult to meet the urgent

Method used

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  • Electrode for supercapacitor and preparation method and application thereof
  • Electrode for supercapacitor and preparation method and application thereof
  • Electrode for supercapacitor and preparation method and application thereof

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Experimental program
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preparation example Construction

[0037] A preparation method for an electrode for a supercapacitor, comprising the following steps:

[0038] S1. After mixing activated carbon, Super P and PVDF, add it to N-methylpyrrolidone (NMP) solvent, ball mill and stir to form a uniform electrode slurry, and coat the electrode slurry on the carbon-coated aluminum foil;

[0039] The mass ratio of the solute composed of activated carbon, Super P and PVDF to the N-methylpyrrolidone solvent is 1: (4-6), and the mass ratio of activated carbon, Super P and PVDF is (8-7): (1-2): 1. The speed of the ball mill stirring treatment is 300-400rpm.

[0040] The thickness of the carbon-coated aluminum foil is 15-20 microns, and the coating thickness of the electrode slurry on the carbon-coated aluminum foil is 150-200 microns.

[0041] S2. Put the coated carbon-coated aluminum foil into a blast oven to dry the solvent, then put it into a vacuum oven, take it out after drying, and roll it tightly on an electric double-roller machine to m...

Embodiment 1

[0053] Weigh 0.8 grams of activated carbon, 0.1 grams of Super P and 0.1 grams of PVDF, mix them in 3 milliliters of N-methylpyrrolidone (NMP) solvent, stir by ball milling at a speed of 300 rpm to form a uniform electrode slurry, and coat with a 100-micron spatula On 18 micron thick charcoal-coated aluminum foil;

[0054] Put the coated pole pieces into a blast oven and bake at 80°C for 3 hours, then put them in a vacuum oven and bake at 80°C for 12 hours, then take them out, put them on an electric roller machine and roll them tightly, the thickness of the rolls is 80% before rolling.

[0055] Put the electrode piece in the ALD vacuum chamber for Al 2 o 3 Deposit 20 cycles. The temperature is 120° C., 20 cycles, and the deposition thickness is 2 nm.

[0056] The above pole pieces were cut and assembled into batteries for electrochemical testing. The CV curve and the charge and discharge test results are as follows: figure 1 and figure 2 shown.

Embodiment 2

[0058] Weigh 0.8 grams of activated carbon, 0.1 grams of Super P and 0.1 grams of PVDF, mix them in 3.5 milliliters of N-methylpyrrolidone (NMP) solvent, and stir at 400 rpm to form a uniform electrode slurry by ball milling. 15 micron thick carbon-coated aluminum foil;

[0059] Put the coated pole piece in a blast oven at 100°C for 2 hours, then put it in a vacuum oven at 70°C for 12 hours, take it out, put it on an electric counter-roller and roll it tightly, and set the thickness to unrolled 90% of the time;

[0060] Put the electrode piece in the ALD vacuum chamber for Al 2 o 3 deposition. Temperature 100°C, 60 cycles, deposition thickness 6 nm;

[0061] The above-mentioned treated electrode pieces were cut and assembled into batteries for electrochemical testing.

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Abstract

The invention discloses an electrode for a supercapacitor and a preparation method and application thereof. The surface charge density of active materials such as super-capacity carbon is enhanced onthe basis of dielectric material polarization, and the specific capacitance is improved; the larger the dielectric constant of the dielectric material is, the better the effect of improving the specific capacitance is; direct contact between an electrolyte and an electrode plate is physically blocked through a sedimentary layer, and a voltage window is widened; and the sedimentary layer accelerates the seepage effect and is beneficial to the improvement of the rate capability.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to an electrode for a supercapacitor and a preparation method and application thereof. Background technique [0002] Supercapacitor is a new type of electrical energy storage device between traditional capacitors and secondary batteries. Compared with lithium-ion batteries, supercapacitors have high power density, long cycle life, short charge and discharge time, environmental friendliness and operating temperature range Wide and other outstanding advantages, it has great application prospects in the future energy storage field. However, its energy density is lower than that of secondary batteries, and it is difficult to meet the urgent needs of large power equipment or electric vehicles that have higher requirements for power and energy density. Therefore, it is crucial to pursue high energy density without sacrificing the power density and cycle life of superc...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/32H01G11/86
CPCH01G11/26H01G11/32H01G11/86Y02E60/13
Inventor 韩晓刚白宇鸽吴晓东尹玉婷杨超李曼妮
Owner 杭州阳名新能源设备科技有限公司
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