One-dimensional micro-nanorod LiMgVO4 material and preparation method thereof

A micro-nano, rod-shaped technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of large particle size, low sample purity, difficult to control, etc., and achieve high material purity, good crystal morphology, and size. small effect

Active Publication Date: 2018-10-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, LiMgVO 4 The materials are prepared by the traditional solid-phase method, the samples obtai

Method used

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  • One-dimensional micro-nanorod LiMgVO4 material and preparation method thereof
  • One-dimensional micro-nanorod LiMgVO4 material and preparation method thereof
  • One-dimensional micro-nanorod LiMgVO4 material and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0030] Example 1:

[0031] In molar ratio (LiOH·H 2 O:MgO:NH 4 VO 3 =1:1:1), respectively weigh 0.316g of lithium hydroxide, 0.276g of magnesium oxide and 0.800g of ammonium metavanadate as raw materials, and grind the raw materials for 15min to mix uniformly; another weighed 1.454g Of sodium nitrate and 1.729g of potassium nitrate, grind for 15 minutes to make them evenly mixed, as the mixed molten salt (NaNO 3 -KNO 3 ). The molten salt and the raw materials were mixed and ground for 2 minutes to obtain a precursor; the precursor obtained above was transferred to a heating furnace, and heat-treated in an air atmosphere, the heat treatment temperature was 300°C, and the reaction time was 3 hours. When the reaction time expires, Get LiMgVO after natural cooling 4 -Salt mixed powder; the LiMgVO obtained above 4 -Salt mixed powder is washed with deionized water several times to remove molten salt, filtered and dried at 100℃ for 3h to obtain rod-shaped LiMgVO 4 material.

[0032] Comp...

Example Embodiment

[0033] Example 2:

[0034] The difference between this embodiment and embodiment 1 is only that the heat treatment temperature is 300°C and 400°C, and the specific implementation process is as follows:

[0035] In molar ratio (LiOH·H 2 O:MgO:NH 4 VO 3 =1:1:1), respectively weigh 0.316g of lithium hydroxide, 0.276g of magnesium oxide and 0.800g of ammonium metavanadate as raw materials, and grind the raw materials for 15min to mix uniformly; another weighed 1.454g Of sodium nitrate and 1.729g of potassium nitrate, grind for 15 minutes to make them evenly mixed, as the mixed molten salt (NaNO 3 -KNO 3 ). The molten salt and the raw material were mixed and ground for 2 minutes to obtain a precursor; the precursor obtained above was transferred to a heating furnace, and the heat treatment was performed in an air atmosphere. The heat treatment temperature was 300°C and 400°C, and the reaction time was 3 hours. When the time expires, LiMgVO will be obtained after natural cooling 4 -Salt...

Example Embodiment

[0037] Example 3:

[0038] The difference between this embodiment and embodiment 1 is only: the reaction time is 1h, 3h and 5h respectively, and the specific implementation process is as follows:

[0039] In molar ratio (LiOH·H 2 O:MgO:NH 4 VO 3 =1:1:1), respectively weigh 0.316g of lithium hydroxide, 0.276g of magnesium oxide and 0.800g of ammonium metavanadate as raw materials, and grind the raw materials for 15min to mix uniformly; another weighed 1.454g Of sodium nitrate and 1.729g of potassium nitrate, grind for 15 minutes to make them evenly mixed, as the mixed molten salt (NaNO 3 -KNO 3 ). The molten salt and the raw material were mixed and ground for 2 minutes to obtain a precursor; the precursor obtained above was transferred to a heating furnace, and heat-treated in an air atmosphere. The heat treatment temperature was 300℃, and the reaction time was 1h, 3h and 5h. When the reaction time expires, LiMgVO will be obtained after natural cooling 4 -Salt mixed powder; the LiM...

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Abstract

The invention provides a one-dimensional micro-nanorod LiMgVO4 material and a preparation method thereof and belongs to the technical field of inorganic non-metallic material preparation. The method is based on a molten salt method, MgO, LiOH.H2O and NH4VO3 are used as raw materials, NaNO3 and KNO3 are used as mixed molten salt, and the raw materials and the molten salt are ground to be uniformlymixed; a precursor obtained through grinding is transferred to a heating furnace and subjected to thermal treatment in the air atmosphere at 300-400 DEG C to react for 1-5 h, and LiMgVO4-salt mixed powder is obtained after natural cooling; the mixed powder is repeatedly washed with deionized water for removal of molten salt, and the rod-like LiMgVO4 material is obtained after filtration and drying. Compared with a solid phase method, the preparation method has the advantages that the preparation temperature of the LiMgVO4 material is decreased from 600 DEG C to 300 DEG C and energy consumptioncan be reduced; the obtained sample has high purity, good rod-like particle dispersity and smaller size and has the diameter of 50-100 nm, the length of 200-600 nm and the length-diameter ratio of 4-10; the preparation condition of the method is simple and controllable, the operation process is convenient, and mass production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic non-metallic materials, in particular to a LiMgVO with one-dimensional micro-nano rods 4 Materials and preparation methods. Background technique [0002] Nanomaterials, because of their unique surface effects, quantum size effects, macroscopic quantum tunneling effects and volume effects and their applications in magnetism, nonlinear optics, light emission, photoconductivity, thermal conductivity, catalysis, chemical activity, sensitive properties, electricity and thermal The peculiar properties exhibited by such aspects have aroused extensive attention of material scientists. Since the discovery of carbon nanotubes in 1991, research on low-dimensional nanomaterials, such as linear, ribbon, rod and tubular nanomaterials, has been increasing at home and abroad. Low-dimensional nanomaterials are also used in many fields due to their unique properties. Such as lithium-ion batteries...

Claims

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Application Information

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IPC IPC(8): C01G31/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/006C01P2002/72C01P2004/03C01P2004/64
Inventor 王立秋丁凯峰
Owner DALIAN UNIV OF TECH
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