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Preparation method of self-supporting nano array with secondary structure

A nano-array, secondary structure technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve the problem of space not being used effectively, achieve improved electrochemical performance, increase active surface area , Improve the effect of space utilization

Active Publication Date: 2020-08-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-dimensional structure synthesized by the above-mentioned published patents makes less use of three-dimensional space, and the space between one-dimensional lines and sheets is not effectively utilized

Method used

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  • Preparation method of self-supporting nano array with secondary structure
  • Preparation method of self-supporting nano array with secondary structure
  • Preparation method of self-supporting nano array with secondary structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a self-supporting nanoarray with a secondary structure, comprising the following steps:

[0033] Step 1: Add 1 mmol of cobalt nitrate hexahydrate, 2 mmol of ammonium fluoride and 5 mmol of urea into 10 mL of deionized water, stir until the solution is clear, and obtain mixed solution A;

[0034] Step 2: Place the mixed solution A in a polytetrafluoroethylene reactor, add the cleaned nickel foam, and react at a temperature of 120°C for 4 hours;

[0035] Step 3: After the reaction, take out the nickel foam, place it in a muffle furnace, and calcinate it at 400°C for 2 hours. After the reaction, cool it down to room temperature naturally, and take out the loaded Co 3 o 4 Nano-arrays of nickel foam,

[0036] Step 4: Add 1mmol of cobalt nitrate hexahydrate and 16mmol of 2-methylimidazole into 40mL of deionized water, mix well to obtain a mixed solution B, place the nickel foam after the reaction in step 3 in the mixed solution B, and let it stand Re...

Embodiment 2

[0039] A self-supporting nanoarray with a secondary structure was prepared according to the steps in Example 1, only the cobalt nitrate hexahydrate in steps 1 and 4 was adjusted to nickel nitrate hexahydrate, and the other steps remained unchanged.

Embodiment 3

[0041] Prepare a self-supporting nanoarray with a secondary structure according to the steps in Example 1, only increase the amount of cobalt nitrate hexahydrate to 3mmol in step 4, increase the amount of 2-methylimidazole to 32mmol, increase the reaction time to 5h, and others The steps are unchanged.

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Abstract

The invention provides a preparation method of a self-supporting nano array with a secondary structure, and belongs to the technical field of supercapacitor material preparation. The preparation method comprises the following steps: firstly, depositing nanowires on a conductive substrate; then growing an MOF template, performing sulfidizing to make the MOF template on the nanowires to collapse tostable secondary nano-particles with strong binding forces. According to the method, the space utilization rate is increased, the active surface area is increased, and more active sites are exposed, so that the MOF template can be easily contacted with an electrolyte, and the electrochemical performance of the nanowire is greatly improved. Meanwhile, due to the existence of a secondary structure,the structural stability of the whole nano array is greatly improved, and the cycle life of the material is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor material preparation, and in particular relates to a method for preparing a self-supporting nanometer array with a secondary structure on a conductive substrate. Background technique [0002] Supercapacitors have higher power density, longer lifetime and higher safety than batteries, which makes them play an important role in solving the energy crisis. According to the working principle, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors; carbon-based materials are usually used as electrode materials for electric double layer capacitors, and pseudocapacitor electrode materials mainly include transition metal hydroxides, oxides, sulfides, and conductive polymers. things etc. So far, most of the practically used electrode materials have added conductive agents and binders. These additives will occupy a certain amount of space and mass, resulting in an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/46B82Y30/00B82Y40/00
CPCH01G11/46H01G11/24H01G11/26B82Y30/00B82Y40/00Y02E60/13
Inventor 陈俊松刘雄雄何倩吴睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA