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Sulfur-doped manganous-manganic oxide nano material as well as preparation method and application thereof

A nano-manganese tetraoxide and sulfur-doped technology, which is applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complex preparation and the performance of positive electrode materials that need to be improved, so as to achieve abundant material sources, Broad industrial application prospects and strong operability

Pending Publication Date: 2022-08-09
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of existing nanostructured electrode materials is usually relatively complicated, and the performance of the obtained cathode materials still needs to be improved.

Method used

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  • Sulfur-doped manganous-manganic oxide nano material as well as preparation method and application thereof
  • Sulfur-doped manganous-manganic oxide nano material as well as preparation method and application thereof
  • Sulfur-doped manganous-manganic oxide nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Take 1.2677g MnSO 4 ·H 2 O and 2.4925g K 3 [Co Ⅲ (EN) 6 ] The powders were respectively dissolved in 30 mL of deionized water to obtain an aqueous solution of manganese sulfate and an aqueous solution of potassium cobalt cyanide. The manganese sulfate aqueous solution was added dropwise to the cobalt potassium cyanide aqueous solution. After the solution was added dropwise, stirring was continued for 2 h at room temperature. Then, the white precipitate was collected by suction filtration, washed three times with deionized water, and then placed in a vacuum drying oven for drying at 100° C. for 24 hours to obtain manganese-cobalt Prussian blue.

[0033] Step 2. Add 60 mg of the above manganese-cobalt Prussian blue to 60 mL of ethanol and ultrasonicate for 20 minutes to obtain a milky white suspension. 120mg Na 2 S·9H 2 O was dissolved in 30 mL of deionized water to obtain a sodium sulfide solution, and the sodium sulfide solution was slowly added to the ab...

Embodiment 2

[0039] Step 1. Take 1.2677g MnSO 4 ·H 2 O and 2.4925g K 3 [Co Ⅲ (EN) 6 ] The powders were respectively dissolved in 15 mL of deionized water to obtain an aqueous solution of manganese sulfate and an aqueous solution of potassium cobalt cyanide. The manganese sulfate aqueous solution was added dropwise to the cobalt potassium cyanide solution. After the solution was added dropwise, stirring was continued at room temperature for 2 hours. Then, the white precipitate was collected by suction filtration, washed three times with deionized water, and then placed in a vacuum drying oven for drying at 100° C. for 24 hours to obtain manganese-cobalt Prussian blue.

[0040] Step 2. Add 60 mg of the above manganese-cobalt Prussian blue to 60 mL of ethanol and ultrasonically for 20 minutes to obtain a milky white suspension. 120mg Na 2 S·9H 2 O was dissolved in 30 mL of deionized water to obtain a sodium sulfide solution. The sodium sulfide solution was slowly added to the above sus...

Embodiment 3

[0044] Step 1. Take 1.2677g MnSO 4 ·H 2 O and 2.4925g K 3 [Co Ⅲ (EN) 6 ] The powders were respectively dissolved in 10 mL of deionized water to obtain an aqueous solution of manganese sulfate and an aqueous solution of potassium cobalt cyanide. The manganese sulfide aqueous solution was added dropwise to the cobalt potassium cyanide aqueous solution. After the solution was added dropwise, stirring was continued for 2 h at room temperature. Finally, the white precipitate was collected by suction filtration, washed three times with deionized water, and then placed in a vacuum drying oven for drying at 100° C. for 24 hours to obtain manganese-cobalt Prussian blue.

[0045] Step 2. Add 60 mg of the above manganese-cobalt Prussian blue to 60 mL of ethanol and ultrasonicate for 20 minutes to obtain a milky white suspension. 120mg Na 2 S·9H 2 O was dissolved in 30 mL of deionized water to obtain a sodium sulfide solution. The sodium sulfide solution was slowly added to the abo...

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Abstract

The preparation method comprises the following steps: under a stirring condition, dropwise adding a manganese-based compound aqueous solution into a cobalt potassium cyanide aqueous solution, stirring for a period of time to obtain a mixed solution, and carrying out suction filtration cleaning and drying treatment on the precipitate of the mixed solution to obtain the sulfur-doped manganous-manganic oxide nano material. A precursor material manganese cobalt prussian blue is obtained; ultrasonically dispersing the precursor material in ethanol, then adding a sodium sulfide aqueous solution under a stirring condition, and continuously stirring until the materials are uniformly mixed to obtain a mixed solution; transferring the mixed solution into a stainless steel high-pressure reaction kettle, carrying out hydrothermal reaction, cooling to room temperature after the reaction is finished, centrifuging, cleaning and collecting a product, and drying to obtain the sulfur-doped manganous-manganic oxide nano material. The sulfur-doped manganous-manganic oxide nano block material with the nanoscale size is obtained by regulating and controlling the nanoscale size and doping sulfur atoms, and the nano material is used as a battery piece of a zinc ion battery and shows excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of zinc ion batteries, in particular to a sulfur-doped manganese tetroxide nanomaterial and a preparation method and application thereof. Background technique [0002] Aqueous zinc-ion batteries are considered to be a promising alternative technology for large-scale energy storage due to their low cost, high safety, and environmental friendliness, and thus have received extensive attention from researchers at home and abroad. Among the current cathode material systems, manganese-based cathode materials have been recognized as the most promising candidates for the industrialization of aqueous zinc-ion batteries due to their high operating voltage and economic benefits. However, the slow kinetics and rapid capacity fading caused by the strong electrostatic repulsion between the divalent zinc ions and the manganese-based host crystal structure is one of the important challenges for the practical application of zinc-ion b...

Claims

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Application Information

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IPC IPC(8): C01G45/02H01M4/36H01M4/50H01M10/36B82Y30/00B82Y40/00
CPCC01G45/02H01M4/362H01M4/50H01M10/36B82Y30/00B82Y40/00C01P2002/72C01P2002/85C01P2004/03C01P2004/64H01M2004/028Y02E60/10
Inventor 侯爽赵灵智郭庆
Owner SOUTH CHINA NORMAL UNIVERSITY
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