Carbon hollow sphere coated metal selenide composite material as well as preparation method and application thereof

A technology of metal selenide and composite materials, which is applied in the field of carbon hollow sphere-coated metal selenide composite materials and its preparation, can solve the problems of unfavorable kinetics and poor cycle stability, and achieve high cycle stability and excellent energy storage performance Effect

Active Publication Date: 2022-05-10
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is disadvantageous in kinetics and has poor cycle stability

Method used

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  • Carbon hollow sphere coated metal selenide composite material as well as preparation method and application thereof
  • Carbon hollow sphere coated metal selenide composite material as well as preparation method and application thereof
  • Carbon hollow sphere coated metal selenide composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 A carbon hollow sphere coated metal selenide composite material and its preparation method

[0038] see Figure 1-13 , the invention is a carbon hollow sphere coated metal selenide composite material, the composite material is a double-layer structure, and the inner layer of the composite material is NiSe x Nanoparticles, the outer layer of the composite material is carbon hollow spheres, and the inner layer of the composite material is NiSe x Nanoparticles are evenly dispersed inside the carbon hollow spheres;

[0039] The preparation method of the carbon hollow sphere coated metal selenide composite material mainly includes the following steps:

[0040] Step 1: Ni(SO 4 ) 2 ·6H 2 O and H 4 ABTC was dissolved in 3ml N,N-dimethylacetamide, 1ml H 2 In the mixture of O and 1ml tetrafluoroboric acid, mixed solution A is obtained after stirring;

[0041] Step 2: Put the mixed solution A in a stainless steel reactor, and then place the stainless steel reacto...

Embodiment 2

[0043] Example 2 A carbon hollow sphere coated metal selenide composite material and its preparation method

[0044] The invention is a carbon hollow sphere coated metal selenide composite material, the composite material has a double-layer structure, and the inner layer of the composite material is NiSe x Nanoparticles, the outer layer of the composite material is carbon hollow spheres, and the inner layer of the composite material is NiSe x Nanoparticles are evenly dispersed inside the carbon hollow spheres;

[0045] The preparation method of the carbon hollow sphere coated metal selenide composite material mainly includes the following steps:

[0046] Step 1: Ni(SO 4 ) 2 ·6H 2 O and H 4 ABTC was dissolved in 6ml N,N-dimethylacetamide, 1ml H 2 In the mixture of O and 1ml tetrafluoroboric acid, mixed solution A is obtained after stirring;

[0047] Step 2: Put the mixed solution A in a stainless steel reactor, and then place the stainless steel reactor in an oven at 120...

Embodiment 3

[0049] Example 3 A carbon hollow sphere coated metal selenide composite material and its preparation method

[0050] The invention is a carbon hollow sphere coated metal selenide composite material, the composite material has a double-layer structure, and the inner layer of the composite material is NiSe x Nanoparticles, the outer layer of the composite material is carbon hollow spheres, and the inner layer of the composite material is NiSe x Nanoparticles are evenly dispersed inside the carbon hollow spheres;

[0051] The preparation method of the carbon hollow sphere coated metal selenide composite material mainly includes the following steps:

[0052] Step 1: Ni(SO 4 ) 2 ·6H 2 O and H 4 ABTC was dissolved in 6ml N,N-dimethylacetamide, 2ml H 2 In the mixture of O and 1ml tetrafluoroboric acid, mixed solution A is obtained after stirring;

[0053] Step 2: Put the mixed solution A in a stainless steel reactor, and then place the stainless steel reactor in an oven at 120...

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Abstract

The invention discloses a carbon hollow sphere coated metal selenide composite material as well as a preparation method and application thereof, and relates to the technical field of green energy materials. The composite material is of a double-layer structure, the inner layer of the composite material is NiSex nanoparticles, the outer layer of the composite material is carbon hollow spheres, and the NiSex nanoparticles of the inner layer of the composite material are uniformly dispersed in the carbon hollow spheres. The invention further discloses a preparation method and application of the NiSex-coated CBs composite material. According to the invention, Ni-soc-MOF is taken as a template, an in-situ selenylation method is adopted to successfully prepare a composite material in which a nickel-selenium compound is embedded into a carbon hollow sphere, the specific capacitance of NiSe (at) CBs reaches up to 1720F g <-1 > when the current density is 1A g <-1 >, and the NiSe (at) CBs//AC asymmetric supercapacitor has high energy density of 45.2 W h kg <-1 > under the power density of 800kW kg <-1 >, shows excellent energy storage performance, and can be applied to the field of supercapacitor devices. The capacitance retention rate of the NiSexCBs//AC asymmetric supercapacitor after 5000 cycles still reaches up to 89%, and the NiSexCBs//AC asymmetric supercapacitor shows high cycle stability.

Description

technical field [0001] The invention belongs to the technical field of green energy materials, and in particular relates to a carbon hollow sphere-coated metal selenide composite material, a preparation method and application thereof. Background technique [0002] With the development of human society, energy shortage and environmental problems have become increasingly prominent. The research and development of high-performance energy storage devices is very important. As an important electrochemical energy storage device, supercapacitors have attracted much attention due to their advantages such as fast charging and discharging, long cycle life, wide operating temperature range, and green safety. However, the biggest disadvantage of supercapacitors compared with lithium-ion batteries is their low energy density, which also limits their large-scale commercial applications. According to supercapacitor E=1 / 2CV 2 The key to increasing the energy density (E) is to increase th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/26H01G11/24H01G11/42H01G11/86
CPCH01G11/36H01G11/42H01G11/86H01G11/24H01G11/26
Inventor 王晶罗家还牛永生刘森
Owner ANYANG INST OF TECH
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