Mesoporous tricobalt tetroxide nanorod, preparation method thereof, supercapacitor electrode material and electrode

A technology of cobalt tetroxide and supercapacitor, applied in hybrid capacitor electrodes, cobalt oxide/cobalt hydroxide, nanotechnology, etc., can solve the problems of poor cyclability, small capacitance, application limitations, etc.

Active Publication Date: 2015-09-30
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the existing Co 3 o 4 There is still a large gap between the electrode material and its theoretical specific capacitance, which is due to the existing Co 3 o 4 Electrode materials have small specific capacitance, low chemical stability and poor cycle performance, which lead to Co 3 o 4 Application of electrode materials in supercapacitors is limited

Method used

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  • Mesoporous tricobalt tetroxide nanorod, preparation method thereof, supercapacitor electrode material and electrode
  • Mesoporous tricobalt tetroxide nanorod, preparation method thereof, supercapacitor electrode material and electrode
  • Mesoporous tricobalt tetroxide nanorod, preparation method thereof, supercapacitor electrode material and electrode

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[0031] The invention provides a method for preparing mesoporous cobalt trioxide nanorods, the preparation method comprising:

[0032] a, preparation of rod-shaped mesoporous silica;

[0033] b. Mixing the rod-shaped mesoporous silica with a cobalt salt solution, and removing the solvent to obtain a cobalt salt-rod-shaped mesoporous silica load;

[0034] c. Decomposing the cobalt salt-rod-shaped mesoporous silica load to obtain a tricobalt tetroxide-rod-shaped mesoporous silica composite;

[0035] d. Carrying out metathesis reaction of the cobalt trioxide-rod-shaped mesoporous silicon dioxide composite with lye to prepare mesoporous cobalt trioxide nanorods.

[0036]In step b of the present invention, the specific amount of each substance can be selected within a wide range, but in order to load more cobalt salts in the mesoporous channels of rod-shaped mesoporous silica, preferably, in step b , relative to 1 mole part of rod-shaped mesoporous silica, the amount of cobalt sal...

Embodiment 1

[0063] a. Prepare rod-shaped mesoporous silica according to the method reported in "High-yield synthesis of periodic mesoporous silica rods and their replication to mesoporous carbon rods":

[0064] At 38°C, 1.6g (0.32mmol) of surfactant P123 and 2.2g (30mmol) of KCl were dissolved in 60g of hydrochloric acid solution with a concentration of 2mol L-1, stirred for 30min, and then added under vigorous stirring 4.2 g (20 mmol) of TEOS. Among them, P123, KCl, HCl, H 2 The mass ratio of O and TEOS is 0.02:1.5:6:166:1. After the mixture was vigorously stirred for 8 min, the stirring was stopped, and it was allowed to stand at 38°C for one day. Then, it was hydrothermally reacted at 130°C for 24 hours. Heating rate 1℃·min -1 ) under roasting for 4h to remove the organic matter and obtain rod-shaped mesoporous silica.

[0065] b. Preparation of cobalt salt-rod-shaped mesoporous silica load D1:

[0066] 0.5g rod-shaped mesoporous SiO 2 Disperse in 5mL with a concentration of 0.8m...

Embodiment 2

[0076] 0.4 g of mesoporous cobalt trioxide nanorods A2 were prepared according to the method of Example 1, except that the calcination temperature in step c was 180°C.

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Abstract

The invention discloses a mesoporous tricobalt tetroxide nanorod, a preparation method thereof, a supercapacitor electrode material and an electrode. The preparation method includes: a, preparing rodlike mesoporous silicon dioxide; b, mixing the rodlike mesoporous silicon dioxide with a cobalt salt solution, and removing solvent to obtain a cobalt salt-rodlike mesoporous silicon dioxide load; c, subjecting the cobalt salt-rodlike mesoporous silicon dioxide load to decomposing reaction to obtain a tricobalt tetroixde-rodlike mesoporous silicon dioxide compound; d, subjecting the tricobalt tetroixde-rodlike mesoporous silicon dioxide compound and alkali liquid to double-decomposing reaction to obtain the mesoporous tricobalt tetroxide nanorod. The supercapacitor electrode made by the mesoporous tricobalt tetroxide nanorod has the advantages of excellent electrochemical reversibility, high specific capacitance, low charge transfer resistance, low charge transfer internal resistance and stable cyclicity.

Description

technical field [0001] The invention relates to a mesoporous cobalt trioxide nanorod and a preparation method thereof, a supercapacitor electrode material containing the mesoporous cobalt trioxide nanorod and a supercapacitor electrode made of the electrode material. Background technique [0002] Supercapacitors are a new generation of energy storage devices following chemical batteries, fuel cells, and hybrid products. They have the advantages of high energy density, long life, and fast charging. More importantly, the simple charge separation between the electrode material and the electrolyte in supercapacitors is conducive to the rapid storage and transportation of energy, and is an important bridge between traditional dielectric capacitors and high energy storage density batteries and fuel cells. The U.S. Department of Energy has long listed supercapacitors as an important device for future energy storage systems, and many countries around the world have invested a lot of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/24H01G11/26B82Y30/00B82Y40/00C01G51/04
CPCY02E60/13H01G11/46B82Y30/00B82Y40/00C01G51/04H01G11/24H01G11/26
Inventor 王露刘孝恒
Owner ANHUI NORMAL UNIV
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