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Core-shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and preparation method thereof

A ternary sulfide and electrode material technology, applied in the direction of nickel compounds, chemical instruments and methods, nickel sulfide, etc., to achieve the effect of increasing the effective contact area, alleviating volume expansion, and improving electrochemical performance

Active Publication Date: 2021-01-15
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many reports on single metal sulfide or binary metal sulfide hollow electrode materials, but few reports on core-shell ternary metal sulfide hollow electrode materials

Method used

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  • Core-shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and preparation method thereof
  • Core-shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and preparation method thereof
  • Core-shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] ① Dissolve 0.07276g cobalt nitrate hexahydrate, 0.07270g nickel nitrate hexahydrate and 0.06275g manganese nitrate tetrahydrate in a mixed solvent of 10mL glycerin and 40mL isopropanol, and transfer the prepared reaction solution to the reaction kettle at 200 The reaction was carried out at ℃ for 24 hours. After the reaction, the product was naturally cooled to room temperature, and the product was centrifuged, washed several times with absolute ethanol, and dried to obtain a solid spherical nickel-cobalt-manganese precursor compound.

[0020] ② Disperse 30 mg of the solid spherical nickel-cobalt-manganese precursor compound prepared in step ① into absolute ethanol, then add 20 mg of thioacetamide, stir for 15 minutes, transfer the reaction solution to the reaction kettle, and set the temperature at 200 ° C React for 12.0 hours. After the reaction, cool naturally to room temperature, centrifuge the product, wash several times with absolute ethanol, and dry to obtain the ...

Embodiment 2

[0023] 1. Dissolve 0.07276g cobalt nitrate hexahydrate, 0.07270g nickel nitrate hexahydrate and 0.06275g manganese nitrate tetrahydrate in a mixed solvent of 25mL glycerin and 25mL isopropanol, transfer the prepared reaction solution to the reaction kettle, and React at 220°C for 24 hours. After the reaction, cool naturally to room temperature, centrifuge the product, wash with absolute ethanol several times, and dry to obtain a solid spherical nickel-cobalt-manganese precursor compound.

[0024] ② Disperse 40 mg of the solid spherical nickel-cobalt-manganese precursor compound prepared in step ① into absolute ethanol, then add 20 mg of thioacetamide, stir for 20 minutes, transfer the reaction solution to the reaction kettle, and place it at 180 ° C React for 12.0 hours. After the reaction, cool naturally to room temperature, centrifuge the product, wash several times with absolute ethanol, and dry to obtain the core-shell nickel-cobalt-manganese ternary sulfide hollow spherica...

Embodiment 3

[0026] ① Dissolve 0.1455g cobalt nitrate hexahydrate, 0.1454g nickel nitrate hexahydrate and 0.1255g manganese nitrate tetrahydrate in a mixed solvent of 10mL ethylene glycol and 40mL isopropanol, transfer the above prepared reaction solution to the reaction kettle, React at 220°C for 24 hours. After the reaction, cool naturally to room temperature, centrifuge the product, wash several times with absolute ethanol, and dry to obtain a solid spherical nickel-cobalt-manganese precursor compound.

[0027] ② Disperse 40 mg of the solid spherical nickel-cobalt-manganese precursor compound prepared in step ① into absolute ethanol, then add 20 mg of thioacetamide, stir for 20 minutes, transfer the reaction solution to the reaction kettle, and place it under the condition of 200 ° C React for 12.0 hours. After the reaction, cool naturally to room temperature, centrifuge the product, wash several times with absolute ethanol, and dry to obtain the core-shell nickel-cobalt-manganese ternar...

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Abstract

The invention discloses a nuclear shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and a preparation method thereof, and belongs to the technical field of functional material preparation. According to the preparation method, isopropanol and polyhydric alcohols serve as a mixed solvent, and a solid spherical nickel-cobalt-manganese precursor compound is prepared through a solvothermal method; then, through vulcanization reaction, the solid spherical nickel-cobalt-manganese precursor compound is converted into the nuclear shell nickel-cobalt-manganese ternary sulfide hollow spherical material. The nuclear shell nickel-cobalt-manganese ternary sulfide hollow spherical material prepared through the preparation method is regular and uniform in shape and appearance and has large specific surface area, transmission and diffusion of ions and electrons are promoted, the effective contact area of electrolyte and the electrode material is enlarged, and many activesites are provided for electrochemical redox reaction; meanwhile, a nuclear shell hollow structure can effectively relieve volume expansion of the electrode material during charging and discharging,and therefore the electrochemical performance of the material is improved. The nuclear shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material has good electrochemical energystorage performance when serving as an electrode material to be applied to a supercapacitor.

Description

technical field [0001] The invention relates to a core-shell nickel-cobalt-manganese ternary sulfide hollow spherical electrode material and a preparation method thereof, belonging to the technical field of functional material preparation. Background technique [0002] The microstructure of electrode materials plays a crucial role in the performance of electrochemical energy storage. Due to its light density and large specific surface area, the electrode material with core-shell hollow structure is conducive to the diffusion and transmission of electrolyte ions and electrons during the electrochemical energy storage process, and can increase the effective contact area between the electrolyte and the electrode material. It can provide many active sites for electrochemical reactions. More importantly, its core-shell hollow structure can alleviate the volume expansion of the electrode material itself during charging and discharging, thereby improving the overall performance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/26C01G53/11
CPCC01G53/006C01G53/11C01P2002/72C01P2004/03C01P2004/04C01P2004/34C01P2004/61H01G11/26H01G11/30Y02E60/13
Inventor 魏成振刘林程承
Owner ANYANG NORMAL UNIV
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