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Lithium sulfur battery anode material and preparation method thereof

A positive electrode material, lithium-sulfur battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of no very effective way

Inactive Publication Date: 2011-03-16
耿世达
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the manufacture of the positive electrode of the battery has always been a major problem that plagues people. This part is responsible for storing and releasing electrons during charge and discharge. Such conductors are in close contact, and there has been no very effective way to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 100g of sucrose, 1g of concentrated sulfuric acid, 100g of water and 10g of silicon dioxide, mix and stir evenly for 5 hours; put the mixture in an oven, the temperature rise rate of the oven is 20°C per hour, the temperature rises to 100°C, and keeps for 5 hours ; After the solvent evaporates, put the mixture into a high-temperature reaction kettle protected by an inert gas for roasting. The heating rate of the high-temperature reactor is 100°C per hour, and the temperature rises to 1000°C for 10 hours; put the roasted mixture into hydrogen Stir in sodium oxide solution or hydrofluoric acid for 10 hours to dissolve the silica template, then filter, wash, and dry to obtain nanometer mesoporous carbon materials with nanometer hollow carbon tubes inside.

[0015] Put the nano-mesoporous carbon material and sulfur nanoparticles into the nano high-temperature and high-pressure steam mixer. The steam temperature range is 100-600°C. The high-temperature steam is used as ...

Embodiment 2

[0018] Weigh 100g of sucrose, 10g of concentrated sulfuric acid, 100g of water and 20g of silicon dioxide, mix and stir evenly for 5 hours; put the mixture in an oven, the oven heating rate is 20°C per hour, the temperature rises to 200°C, and keeps for 5 hours ; After the solvent evaporates, put the mixture into a high-temperature reaction kettle protected by an inert gas for roasting. The heating rate of the high-temperature reactor is 100°C per hour, and the temperature rises to 1000°C for 5 hours; put the roasted mixture into hydrogen Stir in sodium oxide solution or hydrofluoric acid for 10 hours to dissolve the silica template, then filter, wash, and dry to obtain nanometer mesoporous carbon materials with nanometer hollow carbon tubes inside.

[0019] Put the nano-mesoporous carbon material and sulfur nanoparticles into the nano high-temperature and high-pressure steam mixer. The steam temperature range is 100-600°C. The high-temperature steam is used as the carrier to m...

Embodiment 3

[0022] Weigh 100g of sucrose, 10g of concentrated sulfuric acid, 200g of water and 100g of template silica, mix and stir evenly for 5 hours; put the mixture into an oven, the oven heating rate is 20°C per hour, and the temperature rises to 200°C, keeping 5 hours; after the solvent evaporates, the mixture is put into a high-temperature reaction kettle protected by an inert gas for roasting. Stir in sodium hydroxide solution or hydrofluoric acid for 10 hours to dissolve the silica template, then filter, wash, and dry to obtain nanometer mesoporous carbon materials with nanometer hollow carbon tubes inside.

[0023] Put the nano-mesoporous carbon material and sulfur nanoparticles into the nano high-temperature and high-pressure steam mixer. The steam temperature range is 100-600°C. The high-temperature steam is used as the carrier to mix the two. The heating rate of the nano-high temperature and high-pressure steam mixer is per hour. The temperature is raised to 40°C, and then to...

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Abstract

The invention relates to a lithium sulfur battery anode material and a preparation method thereof. In the anode material, nano sulfur particles are uniformly filled in hollow carbon nano-tubes of a nano mesoporous carbon material, so that sulfur is tightly contacted with carbon. The thickness of each carbon tube in the nano mesoporous carbon material is 5 to 200nm, the pore diameter is 2 to 100nm and the granularity of the sulfur nano particles is 2 to 100nm. The capacity of the prepared lithium sulfur battery anode material is more than 1,800mAh / g, and the capacity is kept over 80 percent after 500 cycles.

Description

technical field [0001] The invention relates to a lithium-sulfur battery cathode material and a preparation method thereof, in particular to a nanometer mesoporous carbon material uniformly filled with sulfur nanoparticles and a preparation method thereof. Background technique [0002] With the gradual depletion of major natural resources such as coal and oil, the energy crisis has become one of the major issues that human beings must solve in the future. At present, green and pollution-free new high-energy chemical power sources have become a hot spot that countries all over the world are competing to develop. [0003] Lithium-sulfur batteries hold great promise, and chemists have been working on them for nearly 20 years. Sulfur and lithium are considered to be the most ideal battery materials. The combination of these two chemical substances can not only provide high-density energy, but also have better stability, safety and life, and can be used in lithium batteries Com...

Claims

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Application Information

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IPC IPC(8): H01M4/133H01M4/36H01M4/1393
CPCY02E60/122Y02E60/10
Inventor 耿世达
Owner 耿世达
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