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A new method for the preparation of Ni-Co-S @ Co _ 3O _ 4-Delta nanocomposites with double shell oxygen vacancies was developed

A nanocomposite material, ni-co-s technology, applied in hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc.

Inactive Publication Date: 2019-01-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above patents, for Co 3 o 4 There is no report on the preparation of oxygen vacancies in materials. This patent uses ion exchange method-low temperature heat treatment method-universal reduction method to prepare Ni-Co-S@Co with double-shell oxygen vacancies. 3 o 4-δ nanocomposites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) With carbon paper as the carrier, accurately weigh a certain amount of nickel, cobalt salt, urea, the total substance amount of nickel salt and cobalt salt and the ratio of urea and ammonium fluoride are 3: 5, 50mL distilled water is completely dissolved, and The above mixed solution was transferred to a high-pressure reactor, added carbon paper, and heated at 120°C for 6 hours. After the reaction was completed, it was rinsed with distilled water and ethanol several times, dried in vacuum at 60°C for 24 hours, then put into the reactor, and 50 mL of 0.1 mol / L Na 2 S solution, reacted at 140°C for 8h, after the reaction was completed, repeatedly rinsed with deionized water and ethanol several times, and dried in a vacuum oven at 60°C for 24h to obtain the Ni-Co-S nanocomposite material supported by carbon paper ;

[0011] (2) Taking step (1) product Ni-Co-S nanocomposite material as carrier, accurately take by weighing cobalt salt and urea of ​​certain quality, the ...

Embodiment 2

[0012] Embodiment 2: changing Na 2 The concentration of the S solution is 0.5mol / L, and the other steps are the same as in Example 1 to obtain Ni-Co-S@Co with double-shell oxygen vacancies. 3 o 4-δ nanocomposites.

Embodiment 3

[0013] Embodiment 3: changing NaBH 4 The concentration is 4mol / L, and the other steps are the same as in Example 1 to obtain Ni-Co-S@Co with double-shell oxygen vacancies. 3 o 4-δ nanocomposites.

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PUM

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Abstract

The invention discloses a new method for the preparation of Ni-Co-S @ Co _ 3O _ 4-Delta nanocomposites with double shell oxygen vacancies , Thetheoretical high-capacity Co3O4 is one of the most promising cathode materials for supercapacitors. Firstly, carbon paper is used as a carrier, and Ni-Co-S@Co3O4 core-shell nanocomposites are synthesized by ion exchange method and low temperature heat treatment. Ni-Co-S-Co3O4-Theta nanocomposites with double-shell oxygen vacancies were obtained by universal reduction method, which greatly improved the conductivity and ion diffusion capacity of the electrode, and provided a new high-performance Co3O4 based electrode material design.

Description

technical field [0001] The invention relates to a Ni-Co-S@Co with double-shell oxygen vacancies 3 o 4-δ A new method for the preparation of nanocomposites, specifically involving ion exchange-low temperature heat treatment-universal reduction method to prepare Ni-Co-S@Co with double-shell oxygen vacancies 3 o 4-δ nanocomposite materials. Background technique [0002] Supercapacitor is an energy storage device with high power density, wide operating temperature range and long service life. It is an important component to realize efficient energy utilization and renewable energy storage. In the context of environmental pollution and energy crisis, the development of capacitors has important practical and strategic significance, and complies with the country's energy development strategy. With Co 3 o 4 The positive electrode material of the representative transition metal oxide pseudocapacitive supercapacitor has the characteristics of high theoretical capacitance, wide p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/26
CPCH01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 曲玉宁王静杨鑫谢慧娟胡炫倪梦婷
Owner TIANJIN POLYTECHNIC UNIV
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