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Foamed nickel substrate loaded copper cobaltate nanowire array material and preparation method thereof

A nanowire array, substrate-loaded technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of particle aggregation, cycle performance degradation, and material morphology is not uniform and regular, and achieves simple equipment and production. Low cost and improved electrochemical performance

Inactive Publication Date: 2020-05-01
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature "Y.Wang, D.Yang, J.Lian, J.Pan, T.Wei, Y.Sun, Cedar leaf-like CuCo 2 o 4 directly grow on nickel foam by a hydrothermal / annealing process as an electrode for a high performance symmetric supercapacitor, Journal of Alloys and Compounds (2018), doi:10.1016 / j.jallcom.2017.12.005" reported a leafy CuCo 2 o 4 The preparation method, the capacitance retention rate under 2000 cycles is 88%, the main reason is that the shape of the material is not uniform and regular, which is easy to cause particle aggregation, which leads to the decline of its cycle performance

Method used

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  • Foamed nickel substrate loaded copper cobaltate nanowire array material and preparation method thereof
  • Foamed nickel substrate loaded copper cobaltate nanowire array material and preparation method thereof
  • Foamed nickel substrate loaded copper cobaltate nanowire array material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] A nickel foam substrate supported copper cobalt oxide nanowire array material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0039] Step 1, press cupric chloride dihydrate: cobalt chloride hexahydrate: the mol ratio of urea is 3: 6: 28 batching, then be 0.012mol / L by the concentration of cupric chloride dihydrate, the dihydrate chloride Copper, the cobalt chloride hexahydrate and the urea are dissolved in deionized water and stirred at room temperature to obtain a mixed solution.

[0040] Step 2. Transfer the mixed solution into a high-pressure reactor, then immerse the pretreated nickel foam into the mixed solution, perform a hydrothermal reaction at 120°C for 10 hours, cool naturally to room temperature, and then use deionized water to Washed 4 times, dried at 85° C. for 7 hours to obtain the precursor.

[0041] Step 3. Place the precursor in a tube-type atmosphere furnace, in an air atmosphere, rai...

Embodiment 2

[0046] A nickel foam substrate supported copper cobalt oxide nanowire array material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0047] Step 1, press cupric chloride dihydrate: cobalt chloride hexahydrate: the mol ratio of urea is 3: 6: 28 batching, then be 0.006mol / L by the concentration of cupric chloride dihydrate, the described dihydrate chloride Copper, the cobalt chloride hexahydrate and the urea are dissolved in deionized water and stirred at room temperature to obtain a mixed solution.

[0048] Step 2. Transfer the mixed solution into a high-pressure reactor, then immerse the pretreated nickel foam into the mixed solution, perform a hydrothermal reaction at 125°C for 12 hours, cool naturally to room temperature, and then use deionized water to Washed three times and dried at 80°C for 8 hours to obtain the precursor.

[0049] Step 3. Place the precursor in a tubular atmosphere furnace, in an air at...

Embodiment 3

[0053] A nickel foam substrate supported copper cobalt oxide nanowire array material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0054] Step 1, press cupric chloride dihydrate: cobalt chloride hexahydrate: the mol ratio of urea is 3: 6: 28 batching, then be 0.009mol / L by the concentration of cupric chloride dihydrate, the dihydrate chloride Copper, the cobalt chloride hexahydrate and the urea are dissolved in deionized water and stirred at room temperature to obtain a mixed solution.

[0055] Step 2. Transfer the mixed solution into a high-pressure reactor, then immerse the pretreated nickel foam into the mixed solution, perform a hydrothermal reaction at 123°C for 11 hours, cool naturally to room temperature, and then use deionized water to Washed three times and dried at 85°C for 7 hours to obtain the precursor.

[0056] Step 3. Put the precursor in a tube-type atmosphere furnace, in the air atmosphere,...

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Abstract

The invention relates to a foamed nickel substrate loaded copper cobaltate nanowire array material and a preparation method thereof. According to the technical scheme, the preparation method comprisesthe following steps of: dissolving copper chloride dihydrate, cobalt chloride hexahydrate and urea in deionized water, and stirring to obtain a mixed solution, transferring the mixed solution into ahigh-pressure reaction kettle, immersing the pretreated foamed nickel into the mixed solution, carrying out hydrothermal reaction for 10-12 hours, cooling, washing and drying to obtain a precursor, and putting the precursor into a tubular atmosphere furnace, heating to 400-450 DEG C in an air atmosphere, keeping the temperature, and cooling to obtain the foamed nickel substrate loaded copper cobaltate nanowire array material. The copper cobaltate nanowires of the prepared product are combined with foamed nickel of a three-dimensional hole structure to form a three-dimensional structure in which foamed nickel holes and closely-arranged nanowires are nested. The method has the characteristics of simple process, convenience in operation and environmental friendliness. The prepared foamed nickel substrate loaded copper cobaltate nanowire array material is regular in morphology, high in specific capacity, good in rate capability and excellent in cycle performance.

Description

technical field [0001] The invention belongs to the technical field of copper cobalt oxide nanowire array materials. In particular, it relates to a foamed nickel substrate supported copper cobalt oxide nanowire array material and a preparation method thereof. Background technique [0002] To alleviate the growing environmental challenges and the rapid consumption of fossil fuels, the development of sustainable energy storage systems and eco-friendly energy sources has become a top priority. As a new energy storage device between traditional capacitors and batteries, supercapacitors have the advantages of fast charging speed, high power density, long cycle life, environmental friendliness and high safety, and become one of the most potential next-generation energy storage devices. . At present, capacitor electrode materials are mainly divided into three categories: carbon materials, transition metal oxides, and conductive polymers. The type of electrode materials essentiall...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46
CPCH01G11/46H01G11/86
Inventor 李睿智张灵周盈科
Owner WUHAN UNIV OF SCI & TECH
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