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Preparation method of NbSe2 electrode material as well as product and application of NbSe2 electrode material

A technology of electrode material and selenium powder, which is applied in the field of materials, can solve problems such as depletion, and achieve the effects of high capacity, low cost of preparation process, and uniform appearance

Active Publication Date: 2018-12-11
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the data released by the U.S. Geological Survey in 2015, the global lithium production in 2014 was about 36,000 tons. With the rise of electric vehicles, this number will continue to increase. According to this development speed, lithium resources will be far from enough to meet the needs of the future. People's demand for energy storage, lithium will become a faster depletion resource

Method used

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  • Preparation method of NbSe2 electrode material as well as product and application of NbSe2 electrode material
  • Preparation method of NbSe2 electrode material as well as product and application of NbSe2 electrode material
  • Preparation method of NbSe2 electrode material as well as product and application of NbSe2 electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Firstly, the metal niobium powder and the metal selenium powder are ground separately, and after grinding and sieving, a powder of 20nm-2μm is obtained, and the niobium powder and the selenium powder are mixed evenly according to the molar ratio of 1:2, then added to ethanol, dispersed evenly, and mixed with the added ethanol Evenly form mixed solution, the volume of the ethanol that adds and the ratio of the total substance amount of niobium powder and selenium powder are 1:2.5, L:mol; Next mixed solution is put into ball mill tank, and setting ball mill speed is 300r / min, Take it out after ball milling for 8 hours; finally pour the milled solution into a covered porcelain boat, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 750°C at a heating rate of 10°C / min, and sinter it for 1.5h. The tube furnace was lowered to room temperature, and the brown powder obtained by sintering was collected, that is, NbSe 2 electrode mater...

Embodiment 2

[0031] First, the metal niobium particles and the metal selenium particles are ground separately, and after grinding and sieving, a powder of 20nm-2μm is obtained, and the niobium powder and the selenium powder are mixed evenly according to the molar ratio of 1:2.05, and then added to an organic solvent to disperse evenly. Add ethanol, the ratio of the volume of the added ethanol to the total amount of the niobium powder and the selenium powder is 1:3, L:mol; secondly, put the mixed solution into the ball mill tank, set the ball mill speed to 400r / min, and ball mill for 10h Finally, take it out; finally pour the ball-milled solution into a covered porcelain boat, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 750 °C at a rate of 10 °C / min. After sintering for 2 hours, put the tube furnace into Cool down to room temperature, collect the brown powder obtained by sintering, that is, NbSe 2 electrode material.

Embodiment 3

[0033] First, the metal niobium block and the metal selenium block are ground separately, and after grinding and sieving, a powder of 20nm-2μm is obtained, and the niobium powder and the selenium powder are mixed evenly according to the molar ratio of 1:2.1, and then added to an organic solvent to disperse evenly. The ethanol that adds, the ratio of the volume of the ethanol that adds and the total substance amount of niobium powder and selenium powder are 1:3.6, L:mol; Next mixed solution is put into the ball mill pot, ball mill speed is set to be 500r / min, ball mill Take it out after 12 hours; finally pour the ball-milled solution into a covered porcelain boat, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 750 °C at a rate of 10 °C / min, and sinter for 2.5 hours. The furnace was lowered to room temperature, and the brown powder obtained by sintering was collected, that is, NbSe 2 electrode material.

[0034] NbSe 2 Characteri...

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Abstract

The invention discloses a preparation method of an NbSe2 electrode material as well as a product and application of the NbSe2 electrode material. The method comprises the following step of preparing the NbSe2 electrode material firstly through a solid phase method, wherein the NbSe2 electrode material is prepared through operations such as wet ball-milling and high-temperature sintering, and the method is simple to operate, short in preparation period and low in preparation process cost; the prepared NbSe2 electrode material is unique in sheet structure and is uniform in shape and good in electrochemical performance, the NbSe2 electrode material can serve as a cathode material to be applied in potassium ion batteries, and has the advantages of large capacity, good circulation performance and the like, thereby having a good market application prospect.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a kind of NbSe 2 Preparation methods of electrode materials and their products and applications. Background technique [0002] With the development of portable electronic devices and the rise of electric vehicles, the demand for lithium-ion batteries in today's world is increasing. However, the reserves of lithium resources on the earth are very small, and the content in the earth's crust is only 0.0065%. The global lithium reserves are only 39.78 million tons, of which only 13.5 million tons have mining value. However, according to the data released by the U.S. Geological Survey in 2015, the global lithium production in 2014 was about 36,000 tons. With the rise of electric vehicles, this number will continue to increase. According to this development speed, lithium resources will be far from enough to meet the needs of the future. People's demand for energy storage, lithium will becom...

Claims

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Application Information

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IPC IPC(8): C01B19/00H01M4/58H01M10/054
CPCC01B19/007C01P2002/72C01P2004/03C01P2004/20C01P2004/61C01P2006/40H01M4/581H01M10/054Y02E60/10
Inventor 徐茂文骆雨珊韩进
Owner SOUTHWEST UNIVERSITY
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