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Nickel doped cobaltosic oxide nanometer flower-shaped composite material, preparation method and application thereof

A technology of tricobalt tetroxide and composite materials, which is applied in cobalt oxide/cobalt hydroxide, electrochemical generators, electrical components, etc., can solve problems such as not being able to meet high energy density, and achieve low raw material costs, high product stability, and simple operation Effect

Active Publication Date: 2017-09-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion batteries have been widely used in energy storage and hybrid electric tools, but commercial lithium-ion battery graphite anode materials can no longer meet the needs of high energy density

Method used

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  • Nickel doped cobaltosic oxide nanometer flower-shaped composite material, preparation method and application thereof
  • Nickel doped cobaltosic oxide nanometer flower-shaped composite material, preparation method and application thereof
  • Nickel doped cobaltosic oxide nanometer flower-shaped composite material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.0314 g of Ni(NO 3 ) 2 ﹒ 6H 2 O was dissolved in 50 ml ethanol to form solution A, and 3.480 g of cobalt nitrate hexahydrate Co(NO 3 ) 2 ﹒ 6H 2 O was dissolved in a mixed solution of 25 ml ethanol and 25 ml water to form a solution B, and the solutions A and B were ultrasonically treated for 30 min;

[0026] (2) Mix solution A and solution B, stir, and add 4.320 g urea CO(NH 2 ) 2 , and keep stirring for 30 min;

[0027] (3) Put the mixed solution obtained above in a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 120 °C for a reaction time of 5 hours;

[0028] (4) After the reaction, the precipitate was washed with ethanol and distilled water in turn, and dried at 90°C for 12 hours;

[0029] (5) The powder sample obtained above was placed in a muffle furnace and calcined at 350° C. for 2 hours to obtain a nickel-doped cobalt trioxide nanoflower composite material with good crystallinity.

[0030] figure 1 Scanning electron...

Embodiment 2

[0032] (1) Weigh 0.066 g of Ni(NO 3 ) 2 ﹒ 6H 2 O was dissolved in 50 ml ethanol to form solution A, and 4.5956 g of cobalt chloride hexahydrate CoCl was weighed 2 ﹒ 6H 2 O was dissolved in a mixed solution of 25 ml ethanol and 25 ml water to form a solution B, and the solutions A and B were ultrasonically treated for 30 min;

[0033] (2) Mix solution A and solution B, stir, and add 3.423 g urea CO(NH 2 ) 2 , and keep stirring for 30 min;

[0034] (3) The mixed solution obtained above was placed in a polytetrafluoroethylene reactor, and hydrothermal reaction was carried out at 100 ° C, and the reaction time was 8 hours;

[0035] (4) After the reaction, the precipitate was washed with ethanol and distilled water in turn, and dried at 90°C for 12 hours;

[0036] (5) The powder sample obtained above was placed in a muffle furnace and calcined at 350° C. for 2 hours to obtain a nickel-doped cobalt trioxide nanoflower composite material with good crystallinity.

[0037] ...

Embodiment 3

[0039] (1) Weigh 0.0520 gNi(NO 3 ) 2 . 6H 2 O was dissolved in 50 ml ethanol to form solution A, and 1.9244 g of cobalt acetate tetrahydrate Co(CH 3 COO) 2 ﹒ 4H 2 O was dissolved in a mixed solution of 25 ml ethanol and 25 ml water to form a solution B, and the solutions A and B were ultrasonically treated for 30 min;

[0040] (2) Mix solution A and solution B, stir, and add 4.625 g urea CO(NH 2 ) 2 , and keep stirring for 30 min;

[0041] (3) Put the mixed solution obtained above in a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 180 °C for a reaction time of 3 hours;

[0042] (4) After the reaction, the precipitate was washed with ethanol and distilled water in turn, and dried at 90°C for 12 hours;

[0043] (5) The powder sample obtained above was placed in a muffle furnace and calcined at 350° C. for 2 hours to obtain a nickel-doped cobalt trioxide nanoflower composite material with good crystallinity.

[0044] image 3 It is the electr...

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Abstract

The invention discloses a nickel doped cobaltosic oxide nanometer flower-shaped composite material, a preparation method and an application thereof. The method comprises the following steps: dissolving a nickel solution in ethyl alcohol, dissolving a cobalt salt into a mixed solution of the ethyl alcohol and water and performing ultrasonic treatment for a period of time; and then, mixing the two solutions, stirring, adding urea in the stirring process and stirring for a period of time, wherein the doped volume of nickel is 0.9%-2.3% by mole fraction; after uniformly stirring, transferring into a polytetrafluoroethylene reaction kettle for performing hydrothermal reaction; after completing the reaction, washing and drying, thereby acquiring a nickel doped cobaltosic oxide nanometer flower-shaped composite material. The nickel doped cobaltosic oxide nanometer flower-shaped composite material is high in product stability and stable in property, not only has excellent properties of cobaltosic oxide nanometer oxide but also can promote the conductivity. The preparation method is characterized by simple operation, low raw material cost, low reaction temperature, excellent electrochemical property and wide application in the fields of catalysis, sensing and energy storage.

Description

technical field [0001] The invention relates to the field of preparation of element-doped nano-cobalt tetroxide flower-shaped oxides, in particular to a composite material in-situ doped with nickel element in nano-cobalt tetroxide and a preparation method thereof, belonging to the technical field of nano-composite materials. Background technique [0002] In recent years, energy crisis and environmental pollution are considered to be two major crises facing mankind. The sustainable development of renewable energy is crucial to meet energy demand and is consistent with the goal of sustainable development of mankind. Therefore, high-performance energy conversion and storage devices are urgently needed and researched. Lithium-ion batteries have been widely used in energy storage and hybrid electric tools, but commercial lithium-ion battery graphite anode materials can no longer meet the needs of high energy density. Therefore, alternative anode materials with higher theoreti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04H01M4/525H01M10/0525
CPCC01G51/04C01P2002/54C01P2004/03C01P2004/30C01P2004/61C01P2006/40H01M4/525H01M10/0525Y02E60/10
Inventor 何丹农王艳丽周移张春明林琳王岩岩金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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