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A kind of preparation method of asymmetric supercapacitor

A supercapacitor, asymmetric technology, applied in the field of electrochemistry, can solve the problems of poor cycle performance, excessive resistance, etc., and achieve the effects of good cycle stability, high energy density, and excellent rate performance

Active Publication Date: 2018-11-09
高唐融知融智科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems of excessive resistance or poor cycle performance when doping

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an asymmetric supercapacitor includes the following steps:

[0026] (1) Preparation of positive electrode:

[0027] First, polish the manganese plate with sandpaper, clean and dry, place it on the base of the laser processor, then focus the focused high-energy density pulsed laser beam on the cleaned manganese plate surface in an air atmosphere, and finally aim the laser beam at a uniform speed. Scanning the surface of the manganese plate to obtain MnO 2 / Mn composite material can be directly used as the positive electrode of supercapacitors; among them, the focused high-energy density pulsed laser is femtosecond, picosecond or nanosecond type, the laser wavelength is ultraviolet, visible or infrared light, the laser frequency is 1KHZ-10MHZ, laser The pulse energy is 0.01μJ-1mJ, the laser scanning speed is 5mm / s, and the distance is 0.001-2mm;

[0028] (2) Preparation of negative electrode

[0029] Place the manganese plate in a quartz tube, pass in carb...

Embodiment 2

[0033] A method for preparing an asymmetric supercapacitor includes the following steps:

[0034] (1) Preparation of positive electrode:

[0035] First, polish the manganese plate with sandpaper, clean and dry, place it on the base of the laser processor, then focus the focused high-energy density pulsed laser beam on the cleaned manganese plate surface in an air atmosphere, and finally aim the laser beam at a uniform speed. Scanning the surface of the manganese plate to obtain MnO 2 / Mn composite material can be directly used as the positive electrode of supercapacitors; among them, the focused high-energy density pulsed laser is femtosecond, picosecond or nanosecond type, the laser wavelength is ultraviolet, visible or infrared light, the laser frequency is 1KHZ-10MHZ, laser The pulse energy is 0.01μJ-1mJ, the laser scanning speed is 5cm / s, and the distance is 0.001-2mm;

[0036] (2) Preparation of negative electrode

[0037] Place the manganese plate in a quartz tube, introduce ca...

Embodiment 3

[0041] A method for preparing an asymmetric supercapacitor includes the following steps:

[0042] (1) Preparation of positive electrode:

[0043] First, polish the manganese plate with sandpaper, clean and dry, place it on the base of the laser processor, then focus the focused high-energy density pulsed laser beam on the cleaned manganese plate surface in an air atmosphere, and finally aim the laser beam at a uniform speed. Scanning the surface of the manganese plate to obtain MnO 2 / Mn composite material can be directly used as the positive electrode of supercapacitors; among them, the focused high-energy density pulsed laser is femtosecond, picosecond or nanosecond type, the laser wavelength is ultraviolet, visible or infrared light, the laser frequency is 1KHZ-10MHZ, laser The pulse energy is 0.01μJ-1mJ, the laser scanning speed is 5dm / s, and the distance is 0.001-2mm;

[0044] (2) Preparation of negative electrode

[0045] Place the manganese plate in a quartz tube, pass in carb...

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Abstract

The invention discloses a production method of a high-rate asymmetric supercapacitor. The production method comprises the following steps: firstly, performing ablation treatment on the surface of a manganese plate by adopting a laser ablation method to obtain an MnO2 / Mn composite material serving as a positive electrode, and depositing a carbon nanotube on the surface of the manganese plate to serve as a negative electrode; secondly, sequentially overlapping the positive electrode, a diaphragm and the negative electrode to form a battery pack, putting the battery pack in a packaging casing, and pouring electrolyte into the packaging casing, thus obtaining the asymmetric supercapacitor. The supercapacitor has the advantages of good rate performance, excellent charge and discharge stability and good cycle performance; in addition, the production method is simple and low in cost.

Description

Technical field: [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing an asymmetric supercapacitor. Background technique: [0002] Supercapacitor is a new type of energy storage element between traditional capacitors and batteries. Compared with traditional electrostatic capacitors, supercapacitors have a higher energy density and a greater power density than batteries. Supercapacitors have the characteristics of instantaneous release of large current, high charging and discharging efficiency, and long cycle life. It has important and broad application prospects in the fields of mobile communications, information technology, consumer electronics, electric vehicles, aerospace and defense technology, and has attracted great attention worldwide. Research on supercapacitors is mainly focused on the preparation of high-performance electrode materials and electrodes. [0003] Electrode materials for supercapacitors are mainly divided i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/46
CPCY02E60/13
Inventor 李风浪李舒歆
Owner 高唐融知融智科技服务有限公司