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Nickel-cobalt-manganese ternary metal sulfide hollow structure material and preparation and application thereof

A technology of ternary metals and structural materials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems that cannot be greatly expanded, achieve abundant electroactive sites, excellent conductivity, and ensure stability sexual effect

Active Publication Date: 2021-09-24
多助科技(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the voltage window of aqueous supercapacitors is limited by the decomposition voltage of water (1.23V) and cannot be greatly expanded. Therefore, the development of electrode materials with high specific capacitance has become the most effective way to increase the energy density of supercapacitors.

Method used

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  • Nickel-cobalt-manganese ternary metal sulfide hollow structure material and preparation and application thereof
  • Nickel-cobalt-manganese ternary metal sulfide hollow structure material and preparation and application thereof
  • Nickel-cobalt-manganese ternary metal sulfide hollow structure material and preparation and application thereof

Examples

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Embodiment 1

[0038] This embodiment provides a nickel-cobalt-manganese ternary metal sulfide (NiCoMn-S) hollow structure material, the hollow structure material has a rod-shaped structure with a cavity inside, and the shell layer of the rod-shaped structure has a thickness of 10-15 nm. Composed of NiCoMn-S nanosheets, the wall thickness of the shell is 180-220nm, and the length of the rod-like structure is 2-10μm; the surface of the NiCoMn-S nanosheets is rough and covered with NiCoMn-S nanoparticles; the The NiCoMn-S nanosheets are perpendicular to the surface of the rod-like structure.

[0039] The preparation method of the NiCoMn-S hollow structure material of the present embodiment comprises the following steps:

[0040] S1. Accurately weigh 0.67g of 2-methylimidazole and dissolve it in 20mL of ultrapure water to obtain solution A, accurately weigh 0.30g of cobalt nitrate hexahydrate and dissolve it in 20mL of ultrapure water to obtain solution B; under strong magnetic stirring, the so...

Embodiment 2

[0045] This embodiment provides a nickel-cobalt-manganese ternary metal sulfide (NiCoMn-S) hollow structure material, the hollow structure material has a rod-shaped structure with a cavity inside, and the shell layer of the rod-shaped structure has a thickness of 8-15 nm. Composed of NiCoMn-S nanosheets, the wall thickness of the shell is 170-210nm, and the length of the rod-like structure is 2-10μm; the surface of the NiCoMn-S nanosheets is rough and covered with NiCoMn-S nanoparticles; The NiCoMn-S nanosheets are perpendicular to the surface of the rod-like structure.

[0046] The preparation method of the NiCoMn-S hollow structure material of this example is basically the same as that of Example 1, except that: in step S3, 0.3g of thioacetamide is dissolved in 50mL of absolute ethanol to obtain solution G; 40mg of step S2 The powder NiCoMn-OH obtained in was dispersed into solution G, and mixed solution H was obtained after stirring for 30 min.

[0047] According to the me...

Embodiment 3

[0049] This embodiment provides a nickel-cobalt-manganese ternary metal sulfide (NiCoMn-S) hollow structure material, the hollow structure material has a rod-shaped structure with a cavity inside, and the shell layer of the rod-shaped structure has a thickness of 15 to 30 nm. Composed of NiCoMn-S nanosheets, the wall thickness of the shell is 180-260nm, and the length of the rod-like structure is 1-10μm; the surface of the NiCoMn-S nanosheets is rough and covered with NiCoMn-S nanoparticles; The NiCoMn-S nanosheets are perpendicular to the surface of the rod-like structure.

[0050] The preparation method of the NiCoMn-S hollow structure material of this example is basically the same as that of Example 1, the difference is that in step S3, 0.5g of thioacetamide is dissolved in 50mL of absolute ethanol to obtain solution G; 40mg of step S2 The powder NiCoMn-OH obtained in was dispersed into solution G, and mixed solution H was obtained after stirring for 30 min.

[0051] Accor...

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Abstract

The invention discloses a nickel-cobalt-manganese ternary metal sulfide hollow structure material and preparation and application thereof, and belongs to the field of supercapacitor electrode materials. The preparation method comprises the following steps: by taking ZIF-67 as a template reactant and a cobalt source, carrying out ion exchange on the ZIF-67, nickel salt and manganese salt under a hydrothermal condition, carrying out an H+ etching effect generated by hydrolysis of metal salt and a Kirkendall effect to prepare a NiCoMn-OH hollow structure material; and the hollow structure material and thioacetamide are subjected to solvothermal reaction to prepare the nickel-cobalt-manganese ternary metal sulfide hollow structure material. The nickel-cobalt-manganese ternary metal sulfide hollow structure material prepared by the method has very high specific surface area and specific capacitance, and the specific capacitance can reach 2098.2 F / g when the nickel-cobalt-manganese ternary metal sulfide hollow structure material is used as an electrode material of a supercapacitor.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a nickel-cobalt-manganese ternary metal sulfide hollow structure material and its preparation and application. Background technique [0002] As a promising energy storage device, supercapacitors have attracted extensive attention due to their advantages such as fast charge and discharge speed, high power density, long cycle life, and wide operating temperature range. However, the lower energy density of supercapacitors compared with rechargeable batteries limits their commercial application. In order to further promote the industrialization of supercapacitors, it is of great significance to develop and create a new generation of supercapacitors with high energy density while maintaining their high power density and long cycle life. From the formula for calculating the energy density It can be seen that the increase of the electrode specific capacit...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13Y02E60/10
Inventor 刘启明康陈霞杨希国
Owner 多助科技(武汉)有限公司
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