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Flaky titanium carbide-loaded manganese dioxide composite material for super capacitor electrode material and preparation of flaky titanium carbide-loaded manganese dioxide composite material

A technology for supercapacitors and sheet-shaped titanium carbide, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, and can solve the problems of poor conductivity and stability

Inactive Publication Date: 2016-05-25
WANJING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Manganese dioxide is a metal oxide electrode material with high theoretical specific capacity and good fast charge and discharge performance, but its conductivity and cycle stability under alkaline conditions are poor.

Method used

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  • Flaky titanium carbide-loaded manganese dioxide composite material for super capacitor electrode material and preparation of flaky titanium carbide-loaded manganese dioxide composite material
  • Flaky titanium carbide-loaded manganese dioxide composite material for super capacitor electrode material and preparation of flaky titanium carbide-loaded manganese dioxide composite material
  • Flaky titanium carbide-loaded manganese dioxide composite material for super capacitor electrode material and preparation of flaky titanium carbide-loaded manganese dioxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Ti 3 C 2 T x Preparation: 1gTi 3 AlC 2 Soak the powder in a plastic cup with 5mL 50% HF and stir it electrically for two hours, add 40mL deionized water and stir for 5 minutes, use a 50mL centrifuge tube to centrifuge and wash the solution 5 times until the pH reaches above 6, then vacuum dry at 50°C for 6 hours, grind , get Ti 3 C 2 T x powder;

[0056] Monolayer Ti 3 C 2 T x Preparation: Ti 3 C 2 T x Soak the powder in 12mL dimethyl sulfoxide (DMSO) and stir it electrically for 18 hours, add 30mL deionized water, centrifuge at 9000 rpm, then disperse into 300mL degassed water and ultrasonicate for 5 hours; the solution after ultrasonication is obtained by centrifugation at 500rpm The supernatant, and centrifuging the supernatant at 9000rpm, discarding the supernatant, and vacuum drying at 50°C for 12 hours to obtain a titanium carbide powder with a sheet structure;

[0057] Monolayer Ti 3 C 2 T x / MnO 2 Preparation of composite materials: Weigh 1g of...

Embodiment 2

[0061] Ti 3 C 2 T x Preparation: the concentration of HF is 40%, and the dosage is 2.5mL with electric stirring for 1 hour, and the others are the same as in Example 1.

[0062] Monolayer Ti 3 C 2 T x Preparation: The amount of dimethyl sulfoxide (DMSO) was 10 mL, electric stirring for 10 hours, centrifugation at 5000 rpm, and then dispersed in 150 mL of degassed water for 4 hours of ultrasonication; the ultrasonicated solution was centrifuged at 300 rpm to obtain the supernatant, The supernatant was centrifuged at 6000 rpm, discarded, and vacuum-dried at 80° C. for 6 hours to obtain a titanium carbide powder with a sheet-like structure.

[0063] Monolayer Ti 3 C 2 T x / MnO 2 Preparation of the composite material: the mass ratio of the flaky carbonized titanium powder mixed with potassium permanganate was 1:8, the dosage of potassium permanganate was 8 grams, concentrated sulfuric acid was 0.25 mL, stirred for 1 hour, and the others were the same as in Example 1.

[...

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Abstract

The invention provides a flaky titanium carbide-loaded manganese dioxide composite material, which is mainly applied to a super capacitor electrode material, and belongs to the field of composite materials and the technical field of super capacitors. With Ti<3>AlC<2> powder as a raw material, Ti<3>C<2>T<x> with a two-dimensional flaky structure is formed after Al is etched away through HF; and in-situ growth is carried out on a two-dimensional layered titanium carbide surface by potassium permanganate and the Ti<3>C<2>T<x>, thereby obtaining the composite material loaded with a manganese dioxide thin film and a few of manganese dioxide particles on the flaky titanium carbide surface. The composite material is excellent in capacitive performance; the measured specific capacity can reach 256F / g in 0.5M K<2>SO<4> electrolyte; the specific capacity retention rate reaches 92% after 1,000 cycles; and meanwhile, an AC impedance test demonstrates that the material is extremely low in impedance, has the advantages of good safety, high reliability, sufficient energy and the like and has a broad commercial application prospect.

Description

technical field [0001] The invention relates to a sheet titanium carbide-supported manganese dioxide composite electrode material for supercapacitor electrode material and preparation thereof, belonging to the field of composite materials and the technical field of supercapacitors. technical background [0002] The energy crisis in the 21st century has attracted more and more attention. The shortage of energy and its pollution to the environment force researchers to look for alternative sustainable energy sources such as wind energy, solar energy, and nuclear energy. At this stage when sustainable energy production technologies are very mature, human beings are beginning to turn their goals to how to store this energy. Supercapacitor is a new type of energy storage element that can meet both power demand and energy demand. It combines the characteristics of high power density of capacitors and large energy density of batteries to meet the rapid development of science and tec...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/86
CPCY02E60/13H01G11/86H01G11/30H01G11/32H01G11/46
Inventor 王庆涛张钊雷自强
Owner WANJING ELECTRONICS TECH
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