Al/Al2O3/BaTiO3 composite film super capacitor and preparation method thereof

A technology of supercapacitors and composite films, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, electrolytic capacitors, etc. Small dielectric constant and other problems, to achieve the effect of improving dielectric properties and capacity properties, improving capacity and good dielectric properties

Active Publication Date: 2015-10-28
OCEAN UNIV OF CHINA
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the dielectric constant is relatively small, which in turn leads to low capacitance, and the capacity of the capacitor is small
In addition, th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Al/Al2O3/BaTiO3 composite film super capacitor and preparation method thereof
  • Al/Al2O3/BaTiO3 composite film super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example is used to illustrate the Al / Al 2 o 3 / BaTiO 3 Preparation method of composite film capacitor and its electrochemical performance.

[0037] (1) Aluminum sheet electrode surface treatment

[0038] Cut the aluminum sheet to a size of 3×3cm, and apply appropriate pressure with a tablet press to make the aluminum sheet flat. Ultrasonic cleaning with anhydrous ethanol solution for 10 minutes to remove the grease on the surface of the aluminum sheet, then treatment with 0.1mol / L lye to remove the natural oxide film, and finally chemical polishing with mixed acid (the volume ratio of oxalic acid and phosphoric acid is 1:1) to obtain smooth surface. Then, the surface of the aluminum electrode was treated with triethanolamine treatment solution, the concentration of the treatment solution was 1.5 mol / L, the temperature of the water bath was 75 °C, and the treatment time was 9 min.

[0039] (2) Calcination of barium titanate and pulling coating of barium titanat...

Embodiment 2

[0048] Carry out charge and discharge tests under different high voltages on 5 superimposed capacitors. The mass of the single-sided dielectric layer is 50 mg, that is, the single layer is 50 mg. After 5 superimposed capacitors are equivalent to four capacitors connected in parallel, the total dielectric layer The mass is 0.4g. Under the high voltage of 100V, 200V, 300V, and the current of 20mA, the constant current charge and discharge are carried out. The discharge capacities under the three voltages of 100V, 200V, and 300V are: 3.04×10 -6 Ah, 8.12×10 -6 Ah, 1.22×10 -5 Ah. The discharge time is respectively: 1.07s, 1.45s, 2.18s.

[0049] It can be obtained from Q = I × t = C × U that:

[0050] At 100V, capacity density = Q / U = (3.04×10 -6 Ah · 3600s) / (100V · 0.4g) = 0.92 × 10 -4 F / g. Capacity density: 0.76 Wh / Kg, power density: 2557 W / Kg. Then the capacitance of a single-sided dielectric layer can reach: C = 0.46 × 10 -5 F.

[0051] At 200V, capacity den...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Capacitanceaaaaaaaaaa
Capacity densityaaaaaaaaaa
Capacity densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses an Al/Al2O3/BaTiO3 composite film super capacitor and a preparation method thereof. An aluminium sheet is adopted to serve as an electrode material, triethanolamine is selected as a treatment fluid and will gradually disassociate, the surface of the aluminium electrode is dissolved in an alkali manner under the effect of the triethanolamine, and a reaction quickly occurs in a micropore of the aluminium electrode to produce a hydrated Boehmite AlO (OH) deposited film. The content of alumina in the film is increased, and the structure and the form generating alumina are changed by controlling the degree of oxidation treatment. A thin insulating layer is arranged between the electrode and barium titanate, so the dielectric loss of a dielectric layer is reduced, and then the capacity performance of the capacitor is improved. Moreover, the insulating layer can be closely combined with the barium titanate, so the density of the whole dielectric layer is increased, and thus leakage currents of the capacitor are minimized. Furthermore, the voltage-resistant Al/Al2O3/BaTiO3 composite film super capacitor with high capacity is prepared through multilayer lamination.

Description

Technical field [0001] The present invention belongs to the new energy field, which involves a kind of Al / Al 2 O 3 / Batio 3 Composite film supercapacitors and their preparation methods. Background technique [0002] The electronics capacitor is a basic energy storage element. The electronics capacitor can quickly charge and discharge, high energy storage density, good safety, low cost and other advantages. It is widely used in the electronic industry. ThereforeEssenceTitanic acid has iron electrical properties and as a type of dielectric substance, and its application fields are relatively extensive.In electronic engineering, titanate film capacitors are a class of relatively common capacitors and have great research value. [0003] The energy storage mechanism of the electrical film capacitor is mainly through the polarization process of the mediators, and the amount of energy storage is related to the dielectric material itself. To increase the capacitor of the capacitor, it is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01G11/22H01G11/84
CPCY02E60/13H01G11/22H01G11/84
Inventor 王玮高标初蕾朱志斌孙峰贾新伟陈志鹏
Owner OCEAN UNIV OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap