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Nano sheet self-assembled MoS2 nano hollow material and preparation and application of MoS2 nano hollow material serving as lithium storage electrode material

A hollow, nano-technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effect of good product appearance, simple and easy operation, and improved lithium storage performance

Inactive Publication Date: 2013-02-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There is currently no information about a separate MoS 2 Nanomaterials as active materials for lithium storage electrodes and their preparation methods

Method used

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  • Nano sheet self-assembled MoS2 nano hollow material and preparation and application of MoS2 nano hollow material serving as lithium storage electrode material
  • Nano sheet self-assembled MoS2 nano hollow material and preparation and application of MoS2 nano hollow material serving as lithium storage electrode material
  • Nano sheet self-assembled MoS2 nano hollow material and preparation and application of MoS2 nano hollow material serving as lithium storage electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: MoS 2 Preparation of Nanohollow Materials

[0033] Put 0.865g, 0.515g, and 1.930g of molybdenum oxide, sodium fluoride, and potassium thiocyanate in sequence in water-ethanol (36mL water / 12mL ethanol, V / V=3:1) mixed solvent, and stir evenly for 0.5h . Transfer to a 60mL polytetrafluoroethylene reactor and seal, and react at 200°C for 16h. The reaction product was washed with deionized water and absolute ethanol, centrifuged and dried under vacuum at 60°C for 6 hours to obtain MoS 2 nano hollow materials.

[0034] The resulting MoS 2 The XRD spectrum of nano hollow material products is as follows figure 1 shown; the resulting MoS 2 The transmission electron microscope and scanning electron microscope photos of nano hollow materials are as follows: figure 2 shown.

[0035] Control sample: MoS 2 Preparation of nanosolid materials

[0036] Mix molybdenum oxide, sodium fluoride, and potassium thiocyanate (0.865g, 0.515g, 1.930g) in 50mL of water-glyceri...

Embodiment 2

[0043] Mix molybdenum oxide, sodium fluoride, and potassium thiocyanate (0.865g, 0.515g, 1.930g) into a 50mL water-ethanol mixed solvent reaction system, and the volume ratio of the mixed solvent is water / ethanol=3 / 1 or 1 / 1. Stir evenly for 0.5h and transfer to a 60mL polytetrafluoroethylene reactor, seal it, and react at 140~220°C for 17h. The reaction product is washed with deionized water and absolute ethanol, centrifuged and dried at 60°C for 8h in vacuum. Get MoS 2 nano hollow materials.

Embodiment 3

[0044] Example 3: MoS 2 Preparation of Nanohollow Materials

[0045] Mix 0.865g of molybdenum oxide, 0.515g of sodium fluoride, and 1.930g of potassium thiocyanate, add it to a 50mL water-ethanol mixed solvent reaction system (the volume ratio of water / ethanol is 1 / 2), and seal it in the polytetrafluoroethylene reaction system. In the kettle, react at 200°C for 18h, the product is washed with deionized water and absolute ethanol, centrifuged and vacuum-dried at 60°C for 6 hours, and finally a black powder product is obtained, that is, MoS 2 nano hollow materials.

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Abstract

The invention discloses a nano sheet self-assembled MoS2 nano hollow material and preparation and application of the MoS2 nano hollow material serving as a lithium storage electrode material. The nano sheet self-assembled MoS2 nano hollow material is obtained by mixing raw materials including molybdenum oxide, sodium fluoride and potassium thiocyanate according to the mass ratio of 0.8-0.9:0.5-0.6:1.5-2.9; adding into water-ethanol mixed solvent; placing into a reaction kettle to be sealed; reacting at 140-220 DEG C for 12-30h; and performing washing, separating and drying to obtain products. The method is simple and easy in required condition, cheap and facile in raw materials and controllable in shape and height and easily achieves industrial production. Lithium storage electrodes prepared by adopting the prepared nano sheet self-assembled MoS2 nano hollow material not only have high electro-chemical lithium storage reversible capacity and excellent cycling performance, but also have good rate capability.

Description

technical field [0001] The invention belongs to the field of preparation technology of electrochemical nanomaterials and new energy materials, and in particular relates to a self-assembled MoS of nanosheets 2 Nano hollow material and its preparation and application as lithium storage electrode material. Background technique [0002] Secondary batteries represent the main research direction of energy storage technology. Existing secondary batteries cannot meet the needs of future mobile communications and electric vehicles due to factors such as lifespan, power, capacity, and cost. The preparation and research of nanomaterials is becoming the key science and technology to improve the performance of traditional batteries, develop new batteries, and reduce costs. It is an inevitable choice to comprehensively improve the comprehensive performance of existing secondary batteries and develop new batteries, representing the current battery materials and technologies Mainstream an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/1397
CPCY02E60/122Y02E60/10
Inventor 钱逸泰杨剑王猛李光达徐化云
Owner SHANDONG UNIV
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