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Cobaltosic oxide/NiCoAl dual-layer hydroxide composite material and preparation method thereof

A technology of double-layer hydroxide and cobalt tetroxide, which is used in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of poor rate performance and unstable structure, and achieve improved conductivity, low cost and good ratio. The effect of capacitors

Active Publication Date: 2015-11-25
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems of unstable structure and poor rate performance in the prior art, the purpose of the present invention is to provide a method for preparing cobalt tetroxide / NiCoAl double-layer hydroxide composite material

Method used

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  • Cobaltosic oxide/NiCoAl dual-layer hydroxide composite material and preparation method thereof
  • Cobaltosic oxide/NiCoAl dual-layer hydroxide composite material and preparation method thereof
  • Cobaltosic oxide/NiCoAl dual-layer hydroxide composite material and preparation method thereof

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preparation example Construction

[0030] The preparation method of tricobalt tetroxide / NiCoAl double-layer hydroxide composite material provided by the invention comprises the following steps:

[0031] Step 1: Add cobalt nitrate hexahydrate, ammonium fluoride and urea to the deionized In deionized water, the first mixed system is obtained through thorough mixing;

[0032] Specifically, take cobalt nitrate hexahydrate, ammonium fluoride, and urea respectively, add them to deionized water, and control the molar ratio of cobalt nitrate hexahydrate, ammonium fluoride, urea, and deionized water to 1:3~4.5: 10~13:1400~1680 (such as 1:3.1:10.5:1410, 1:3.5:12:1550, 1:3.5:11:1500, 1:3.8:11.8:1580, 1:4:12.2:1600, 1 :4:10.2:1660, 1:3.2:12:1650, 1:4.2:12:1650, 1:4.2:13:1410, 1:4.2:13:1450, 1:4.2:13:1480, 1:4.2 :13:1520, 1:4.2:13:1670), stirred at room temperature to make it fully mixed, so as to obtain the first mixed system, preferably, the stirring time is 0.5 ~ 24h (such as 0.6h, 1h, 3h, 5h, 8h, 12h, 14h, 16h, 18h, ...

Embodiment 1

[0050] (1) Get 0.69g cobalt nitrate hexahydrate, 0.3g ammonium fluoride and 1.5g urea respectively, add to 60ml deionized water, that is, the molar ratio of cobalt nitrate hexahydrate, ammonium fluoride, urea and deionized water is 1: 3.42:10.5:1405, uniformly stirred at room temperature for 2 hours to form a transparent solution, and obtained the first mixed system;

[0051] (2) Add 50g of foamed nickel substrate (thickness is 1.6mm, surface density 350±25g / ㎡) to the first mixing system described in step (1), then put into the reactor and seal the reactor, at 150 Reaction for 6 hours under high temperature, obtained the first reaction product;

[0052] (3) The first reaction product described in step (2) is alternately washed with absolute ethanol and distilled water, each washed 3 times, and vacuum-dried at 80° C. for 15 hours, that is, an array of cobalt trioxide nanowires is obtained on the foamed nickel substrate;

[0053] (4) Take 0.28g cobalt nitrate hexahydrate, 0.28g...

Embodiment 2

[0059] (1) Get 0.69g cobalt nitrate hexahydrate, 0.3g ammonium fluoride and 1.5g urea respectively, add to 60ml deionized water, that is, the molar ratio of cobalt nitrate hexahydrate, ammonium fluoride, urea and deionized water is 1: 3.42:10.5:1405, uniformly stirred at room temperature for 2 hours to form a transparent solution, and obtained the first mixed system;

[0060] (2) Add 50g of foamed nickel substrate (thickness is 1.6mm, surface density 350±25g / ㎡) to the first mixing system described in step (1), then put into the reactor and seal the reactor, at 150 Reaction for 6 hours under high temperature, obtained the first reaction product;

[0061] (3) alternately washing the first reaction product described in step (2) with absolute ethanol and distilled water, each washing 3 times, and vacuum-drying at 80° C. for 15 hours to obtain the cobalt tetraoxide nanowire array;

[0062] (4) Take 0.19g cobalt nitrate hexahydrate, 0.19g nickel nitrate hexahydrate, 0.07g aluminum ...

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Abstract

The invention discloses a cobaltosic oxide / NiCoAl dual-layer hydroxide composite material and a preparation method thereof. According to the method, a cobaltosic oxide / NiCoAl dual-layer hydroxide compound with a core-shell structure is prepared by a twice hydrothermal method; according to the prepared cobaltosic oxide / NiCoAl dual-layer hydroxide compound with the core-shell structure, a cobaltosic oxide nanowire is taken as a core; NiCoAl dual-layer hydroxide is taken as a shell; and the cobaltosic oxide nanowire and the NiCoAl dual-layer hydroxide generate a synergistic effect to enhance the electrochemical property. Therefore, the technical problems of unstable structure, poor rate capability and the like in the prior art are solved; and the cobaltosic oxide / NiCoAl dual-layer hydroxide composite material is especially suitable for a super capacitor material; the preparation method is simple and fast; and large-scale production can be realized.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for supercapacitors, and in particular relates to a tricobalt tetroxide / NiCoAl double-layer hydroxide composite material and a preparation method thereof. The composite material has a core-shell structure. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. From the point of view of the energy storage mechanism, supercapacitors are divided into double-layer capacitors and pseudocapacitors. The capacitance of electric double layer capacitors is based on the electric double layer capacitance generated by the charge separation on the electrode / electrolyte interface. The electrode materials are generally various carbonaceous materials. Commonly used carbon materials include activated carbon powder, carbon aer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/46H01G11/24
CPCY02E60/13
Inventor 戚雯李轩曾宏武英况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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