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A kind of preparation method of two-dimensional nanosheet

A two-dimensional nanometer, manganese acetate technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of low specific capacitance of nickel hydroxide and poor cycle stability, and achieve mild preparation conditions, simple process and energy saving. Effect

Active Publication Date: 2021-01-01
安徽佳西电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as an electrode material for supercapacitors, the specific capacitance of nickel hydroxide is much lower than the theoretical value, and the cycle stability is poor.

Method used

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  • A kind of preparation method of two-dimensional nanosheet
  • A kind of preparation method of two-dimensional nanosheet
  • A kind of preparation method of two-dimensional nanosheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 4mmoL nickel acetate and 0.5mmoL manganese acetate into 20mL deionized water, stir evenly, then add 1mL ammonia water while stirring; use magnetic stirring for 0.5h to obtain precipitation;

[0033] (2) Pour the precipitate into a polytetrafluoroethylene-lined stainless steel autoclave, heat up to 120°C, react for 6 hours, and cool after the reaction;

[0034] (3) The reaction product was centrifuged to obtain a solid powder, which was then washed with distilled water and ethanol in turn, and then dried at 60°C for 24 hours to obtain Mn 0.11 Ni 0.89 (OH) 2 Two-dimensional nanosheets.

[0035] The prepared Mn 0.11 Ni 0.89 (OH) 2 Two-dimensional nanosheet products were analyzed.

[0036] Such as figure 1 Shown, is the XRD pattern of embodiment 1 product, can find out from the figure that all diffraction peaks are all consistent with standard layered α-Ni(OH) 2 (Card No.: PDF#14-0117) corresponding to the crystal spectrum. The peaks at the diffraction angl...

Embodiment 2

[0039] (1) Add 4mmoL nickel acetate and 1mmoL manganese acetate into 20mL deionized water, stir evenly, then add 1mL ammonia water while stirring; use magnetic stirring for 0.5h to obtain precipitation;

[0040] (2) Pour the precipitate into a polytetrafluoroethylene-lined stainless steel autoclave, heat up to 120°C, react for 6 hours, and cool after the reaction;

[0041] (3) The reaction product was centrifuged to obtain a solid powder, which was then washed with distilled water and ethanol in turn, and then dried at 60°C for 24 hours to obtain Mn 0.2 Ni 0.8 (OH) 2 Two-dimensional nanosheets.

[0042] The product that this embodiment makes is basically consistent with embodiment 1, and its scanning electron microscope picture is as image 3 shown.

Embodiment 3

[0044] (1) Add 4mmoL nickel acetate and 2mmoL manganese acetate into 20mL deionized water, stir evenly, then add 1mL ammonia water while stirring; use magnetic stirring for 0.5h to obtain precipitation;

[0045] (2) Pour the precipitate into a polytetrafluoroethylene-lined stainless steel autoclave, heat up to 120°C, react for 6 hours, and cool after the reaction;

[0046] (3) The reaction product was centrifuged to obtain a solid powder, which was then washed with distilled water and ethanol in turn, and then dried at 60°C for 24 hours to obtain Mn 0.67 Ni 0.33 (OH) 2 Two-dimensional nanosheets.

[0047] The product that this embodiment makes is basically consistent with embodiment 1, and its scanning electron microscope picture is as Figure 4 shown.

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Abstract

The invention discloses a preparation method of 2D nanosheets. According to the preparation method, ammonium hydroxide is added to a mixed solution of manganese acetate and nickel acetate for a stirring reaction firstly, then an obtained precipitate is subjected to a high-temperature reaction, centrifugal separation, washing and drying, and 2D Mn0.11Ni0.89(OH)2 nanosheets are obtained, wherein thehigh-temperature reaction is performed at 110-130 DEG C. A hydrothermal method is adopted, preparation conditions are mild, and the process is simple and energy-saving. The 2D Mn0.11Ni0.89(OH)2 nanosheets have great application potential in the fields of capacitors, batteries and electrocatalysis.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of two-dimensional nanosheets. Background technique [0002] Nickel hydroxide has a unique layered structure, excellent electrochemical performance, low cost and no pollution, and is a very competitive electrode material in the field of supercapacitors and electrocatalytic oxidation of water. However, as an electrode material for supercapacitors, the specific capacitance of nickel hydroxide is much lower than the theoretical value, and the cycle stability is poor. [0003] The properties of materials depend on the size, morphology and crystal structure of the material itself. Therefore, the hotspot of materials science is to control the morphology and structure of materials. During crystal growth, the evolution of morphology mainly depends on the growth environment. Exotic substances play an important role in the growth environment. Addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04C01G53/00
CPCC01G53/00C01G53/04C01P2004/20C01P2004/62C01P2004/64C01P2004/82C01P2006/40C01P2006/80
Inventor 刘荣梅江紫翔汪越哲舒畅孙雪莹
Owner 安徽佳西电子科技有限公司
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