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A method for improving the performance of supercapacitors

A supercapacitor, performance technology, applied in the field of improving supercapacitor performance

Active Publication Date: 2021-11-23
西安合容新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are for surface modification on active materials, and few articles have reported modification on supercapacitor electrodes.

Method used

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  • A method for improving the performance of supercapacitors
  • A method for improving the performance of supercapacitors
  • A method for improving the performance of supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method of improving the performance of supercapacitors, specifically, according to the following steps:

[0038]Step 1, 0.8 grams of activated carbon, 0.1 g super p and 0.1 grams of PVDF, mixed into 3 ml N-methylpyrrolidone (NMP) solvent, stirred by a spherical mill 300 rpm radometer to form a uniform electrode slurry, with 200 micron scraper Apply carbon foil coated with 18 microns.

[0039] Step 2, put the coated pole piece into the blower oven at 80 ° C for 3 hours, then put it in a vacuum oven at 80 ° C for 12 hours, put it out, placed on the electric roll machine, tight, roller pressure The thickness is set to 80% before the roll pressure.

[0040] Step 3, 1 g of PVDF-HFP, 0.025 grams of nanotubes, 0.025 g of PVP, and 3.95 g, N-dimethylformamide (DMF) were sequentially added to the ball mill and stirred, and the rotational speed was 350 rpm.

[0041] Step 4, the stirred slurry is applied to the surface on the surface of the thickness of 25 microns with a doctor blade...

Embodiment 2

[0044] A method of improving the performance of supercapacitors, specifically, according to the following steps:

[0045] Step 1, respectively weigh 0.7 grams of activated carbon, 0.2 grams of Super P and 0.1 g of PVDF, mixed with 3.5 ml of N-methylpyrrolidone (NMP) solvent, and formed a uniform electrode slurry by ball milling, using a 150 micron scraper coating. Coated carbon foil in 15 microns.

[0046] Step 2, put the coated pole piece into the blower oven at 100 ° C for 2 hours, then put it in a vacuum oven at 80 ° C for 12 hours, then take it out, placed on the electric roller machine, roll pressure, roll pressure The thickness is set to 90% before the roll pressure.

[0047] Step 3, 1 g of PVDF-HFP, 0.02 grams of nanotubes, 0.005 g graphene, 0.025 g of PVP and 3.95 g of N, N-dimethylformamide (DMF) were sequentially added to the ball mill and stirring, and the rotational speed was 350 rpm.

[0048] Step 4, the stirred slurry is applied to the surface of the pole on the surf...

Embodiment 3

[0051] A method of improving the performance of supercapacitors, specifically, according to the following steps:

[0052] Step 1, respectively weigh 0.8 grams of activated carbon, 0.1 g super p and 0.1 g of PVDF, mixed into 4 ml N-methylpyrrolidone (NMP) solvent, and stirred with a spherical mill 400 rpm to form a uniform electrode slurry, with 100 micrometers The doctor blade is coated with a 20 micron thick carbon foil.

[0053] Step 2, put the coated pole piece into the blower oven at 90 ° C for 2 hours, then put it in the vacuum oven at 70 ° C for 12 hours, put it on the electric roller press, roll pressure The thickness is set to 80% before the roll pressure.

[0054] Step 3, 1 g of PVDF-HFP, 0.025 grams of nanotubes, 0.025 g of PVP, and 3.95 g, N-dimethylformamide (DMF) were sequentially added to the ball mill and stirred, and the rotational speed was 350 rpm.

[0055] Step 4, the stirred slurry is applied to the surface on the surface of the thickness of 50 microns by a doc...

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Abstract

The invention discloses a method for improving the performance of a supercapacitor. First, N-methylpyrrolidone is used as a solvent, followed by adding PVDF, Super P, and activated carbon to prepare a slurry and coat it on a carbon-coated aluminum foil; then the coated The carbon-coated aluminum foil is firstly dried by ordinary drying, then vacuum-dried, and finally rolled and compacted to make a pole piece; N, N-dimethylformamide is used as a solvent, and a mixture of PVDF-HFP, PVP and conductive nano-carbon materials is used as a solute. Then the solvent and the solute are prepared into a slurry by ball milling and stirring, and then coated on the surface of the prepared pole piece; finally, the obtained pole piece is vacuum-dried to form a layer of polymer film on the surface of the pole piece, and then the pole piece Tailored assembly to fabricate surface-modified activated carbon-based supercapacitors. The invention effectively improves the rate performance and cycle stability of the material, and the prepared supercapacitor has high energy density.

Description

Technical field [0001] The present invention belongs to the technical field of supercapacitor, and specific to a method of improving supercapacitor performance. Background technique [0002] The supercapacitor is also known as electrochemical capacitors, and is an interface formed between electrodes and electrolytes to store electrical energy, and a new green energy storage device between conventional capacitors and secondary batteries. The supercapacitor has a high-speed capacitor, a wide operating voltage range, an environmentally friendly, high-energy density, and high power density, and has the ability to high power output and secondary battery reserve charges in traditional capacitors. Nowadays, supercapacitors have become more extensive applications in electronics, communications, medical, defense, aerospace and other areas. The supercapacitor relies on the electrolyte ions to form a stable duplex layer on the surface of the charge electrode or accumulate at the electrode t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/84H01G11/24H01G11/30H01G11/36H01G11/48H01G11/34B82Y30/00
CPCB82Y30/00H01G11/24H01G11/30H01G11/34H01G11/36H01G11/48H01G11/84H01G11/86Y02E60/13
Inventor 李祥元白锋李浩车景锋
Owner 西安合容新能源科技有限公司