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A spherical core-shell structure c@mno 2 @nial-ldh nanocomposites and methods for their preparation

A nanocomposite, core-shell structure technology, applied in the field of nanomaterial preparation, can solve the problems of poor stretchability, limited application, weakened rate performance, etc., achieve the effect of extremely repeatable, increase binding sites, and improve specific capacitance properties

Active Publication Date: 2021-07-30
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon material is a widely used material. It has the advantages of abundant raw materials and high electrical conductivity. It is regarded as a good supercapacitor electrode material by many researchers. However, carbon material has a special structure, and its rate performance will gradually weaken and stretch. Poor, so it limits the application of carbon materials in the field of supercapacitors
Some metal oxides, such as RuO 2 , showing excellent electrochemical properties of supercapacitors, but as a noble metal, the scarcity of Ru itself limits its application in many fields

Method used

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  • A spherical core-shell structure c@mno <sub>2</sub> @nial-ldh nanocomposites and methods for their preparation
  • A spherical core-shell structure c@mno <sub>2</sub> @nial-ldh nanocomposites and methods for their preparation
  • A spherical core-shell structure c@mno <sub>2</sub> @nial-ldh nanocomposites and methods for their preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A spherical core-shell structure of C@MnO 2 The preparation method of @NiAl-LDH nanocomposite comprises the following steps:

[0027] (1) Preparation of C ball

[0028] Ultrasonically disperse 7.2g of glucose in 80mL of deionized water to form a homogeneous solution, then transfer it to a stainless steel reactor, and react in an oven at 180°C for 6h; Wash three times and dry in a vacuum oven at 80°C for 12 hours to obtain C balls;

[0029] (2) Preparation of C@MnO 2 composite material

[0030] Ultrasonic disperse 1.0 g of C spheres in 70 mL of deionized water, then add 0.5 g of KMnO 4 and stir evenly; transfer the obtained solution to a stainless steel reaction kettle, and react in a 120°C oven for 12 hours; after the reaction is completed, naturally cool to room temperature, and the obtained product is alternately washed three times with deionized water and absolute ethanol, and dried in a vacuum oven at 80°C for 12 hours , get C@MnO 2 composite materials;

[00...

Embodiment 2

[0035] A spherical core-shell structure of C@MnO 2 The preparation method of @NiAl-LDH nanocomposite comprises the following steps:

[0036] (1) Preparation of C ball

[0037] Same as Example 1.

[0038] (2) Preparation of C@MnO 2 composite material

[0039] Same as Example 1.

[0040] (3) Preparation of C@MnO 2 @NiAl-LDH nanocomposite

[0041] 0.131g nickel nitrate hexahydrate and 0.085g aluminum nitrate nonahydrate were completely dissolved in 25mL deionized water to form solution A; 0.1g C@MnO 2 Composite material, 0.043g Na 2 CO 3 and 0.063g NaOH were completely dissolved in 25mL deionized water to form solution B; solution A was added dropwise to solution B with constant stirring; the resulting suspension was transferred to a stainless steel reactor and reacted in an oven at 120°C for 6h; the reaction was completed After that, it was naturally cooled to room temperature, and the obtained product was alternately washed three times with deionized water and absolute...

Embodiment 3

[0044] A spherical core-shell structure of C@MnO 2 The preparation method of @NiAl-LDH nanocomposite comprises the following steps:

[0045] (1) Preparation of C ball

[0046] Same as Example 1.

[0047] (2) Preparation of C@MnO 2 composite material

[0048] Same as Example 1.

[0049] (3) Preparation of C@MnO 2 @NiAl-LDH nanocomposite:

[0050] 0.524g nickel nitrate hexahydrate and 0.338g aluminum nitrate nonahydrate were completely dissolved in 25mL deionized water to form solution A; 0.1g C@MnO 2 Composite material, 0.170g Na 2 CO 3 and 0.252g NaOH were completely dissolved in 25mL deionized water to form solution B; solution A was added dropwise to solution B with constant stirring; the resulting suspension was transferred to a stainless steel reactor and reacted in an oven at 120°C for 6h; the reaction was completed After that, it was naturally cooled to room temperature, and the obtained product was alternately washed three times with deionized water and absolut...

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Abstract

The invention discloses a spherical core-shell structure C@MnO 2 @NiAl‑LDH nanocomposite and its preparation method, characterized in that: the nanocomposite is coated with MnO on C nanospheres 2 , in MnO 2 Coated with NiAl‑LDH nanosheets. C@MnO with spherical core-shell structure prepared by the present invention 2 The @NiAl‑LDH nanocomposite has very excellent supercapacitor properties, and the production process of the present invention is simple and safe, with strong operability and excellent repeatability.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a spherical core-shell structure of C@MnO 2 @NiAl-LDH nanocomposite and its preparation method. Background technique [0002] As a green, pollution-free and low-cost energy storage device, supercapacitors have attracted extensive attention and interest from researchers from various countries, but at the same time, higher requirements have been put forward for their active electrode materials. In order to prepare a high-performance supercapacitor, the relevant electrode materials are required to have large specific surface area and pore volume, excellent electrical conductivity, and good cycle stability. Carbon material is a widely used material. It has the advantages of abundant raw materials and high electrical conductivity. It is regarded as a good supercapacitor electrode material by many researchers. However, carbon material has a special structure, and its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/42H01G11/44H01G11/46H01G11/86
CPCY02E60/13
Inventor 毛昌杰张云滑旭陈鹏鹏张忠洁陈京帅吴明元
Owner ANHUI UNIVERSITY
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