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Preparation method of SnS micron flower and application of SnS micron flower in magnesium battery

A micron flower and magnesium battery technology, applied in the field of electrochemical energy storage, can solve the problems of lack of high-capacity, long-cycle positive electrode materials, lack of electrolyte, etc., and achieve high discharge capacity, high theoretical specific capacity, and long cycle life.

Inactive Publication Date: 2019-07-16
NANJING UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biggest obstacle to the development of magnesium batteries is the lack of electrolyte compatible with positive and negative electrodes, and the lack of high-capacity, long-cycle positive electrode materials.

Method used

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  • Preparation method of SnS micron flower and application of SnS micron flower in magnesium battery
  • Preparation method of SnS micron flower and application of SnS micron flower in magnesium battery
  • Preparation method of SnS micron flower and application of SnS micron flower in magnesium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of SnS microflowers:

[0028] (1) SnCl 4 1. Add thiourea into a certain amount of 1:4 ethylene glycol / water mixed solution at a molar ratio of 1:2.5, stir until dissolved, then add an appropriate amount of cetyl ammonium bromide, and stir for half an hour;

[0029] (2) Transfer the mixed solution to a polytetrafluoroethylene reactor and react at 160°C for 20 hours;

[0030] (3) After natural cooling, wash with water and ethanol several times respectively, and dry under vacuum at 60°C.

[0031] figure 1 A scanning electron microscope image (SEM) of the SnS is shown, and it can be seen from the figure that the SnS morphology is a microsphere.

Embodiment 2

[0033] Electrochemical performance test:

[0034] The magnesium battery was assembled in an anhydrous and oxygen-filled argon glove box, and its electrochemical performance tests were completed in the Blue Electron Testing System (LAND). Specific steps are as follows:

[0035] (1) Grind the prepared SnS micron flowers, acetylene black and polytetrafluoroethylene according to the mass ratio of 7:2:1, then add an appropriate amount of N-methylpyrrolidone, stir into a homogenous slurry, and apply it on carbon paper Electrode sheet was made on it, and dried in vacuum at 60°C for 24 hours, and then cut into a disc with a diameter of 1.4cm, that is, the positive electrode;

[0036] (2) Polish the magnesium foil to silvery white with sandpaper, wash it with tetrahydrofuran, dry it naturally, and cut it into small discs, that is, the negative electrode;

[0037] (3) Open the glove box, and assemble the SnS positive electrode, magnesium foil negative electrode, glass fiber membrane a...

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Abstract

The invention discloses a preparation method of a flower-shaped SnS micron flower. The method comprises the following steps: (1) adding a tin source and a sulfur source into a mixed solution of ethylene glycol / water, then adding cetyl ammonium bromide, and performing stirring; (2) transferring the mixed solution in the step (1) to a polytetrafluoro reaction kettle, and carrying out a reaction at 160 DEG C for 20-24 h; and (3) performing centrifugation, washing and vacuum drying after natural cooling to obtain the SnS micron flower. The SnS micron flower synthesized by using a simple solvothermal method has a relatively large specific surface area, an electrolyte can be sufficiently contacted with an active material, and the storage of magnesium ions is facilitated. In addition, SnS is an electrode material based on a conversion reaction in a magnesium battery cathode material, has a relatively high theoretical specific capacity, low cost, safety and low toxicity, and is a promising electrode material.

Description

technical field [0001] The present application relates to the field of electrochemical energy storage, in particular, to a preparation method of SnS microflowers and its application in magnesium batteries. Background technique [0002] With the increasing energy and environmental problems, the world is developing clean and renewable energy. At present, the main power sources mainly include nickel-metal hydride batteries, lead-acid batteries, and lithium-ion batteries. However, nickel-metal hydride batteries have a memory effect, and lead-acid batteries use lead, a heavy metal element that is harmful to the environment. Although lithium-ion batteries have the advantages of high energy density, long cycle life, and no memory effect, the lack of lithium resources and lithium dendrites The resulting safety issues limit the application of lithium-ion batteries in large-scale power systems. [0003] Due to the increasing demand for power energy in various countries, it is partic...

Claims

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Application Information

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IPC IPC(8): C01G19/00H01M4/58H01M10/054
CPCC01G19/00H01M4/5815H01M10/054C01P2004/03C01P2004/32Y02E60/10
Inventor 金钟薛晓兰王艳荣闫长增
Owner NANJING UNIV
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