Method for preparing metallic compound/porous carbon nanorod of hierarchy structure

A metal compound, hierarchical structure technology, applied in nanotechnology, nanotechnology, structural parts, etc., can solve the problems of unsatisfactory volume expansion reversibility, poor material cycle stability, etc., achieve excellent cycle stability, improve cycle stability, high yield effect

Inactive Publication Date: 2017-02-15
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such materials usually have high capacity, but the unfavorable reversibility of volume expansion leads to relatively poor cycling stability of the material.

Method used

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  • Method for preparing metallic compound/porous carbon nanorod of hierarchy structure
  • Method for preparing metallic compound/porous carbon nanorod of hierarchy structure
  • Method for preparing metallic compound/porous carbon nanorod of hierarchy structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of vanadium oxide / porous carbon nanorods of the present invention is specifically completed in the following steps:

[0039]1. Mix the vanadium chloride solution with water to prepare an inorganic salt solution with a molar concentration of 7.0mmol / L. Add 3.5mmol / L of 1,4-naphthalene dicarboxylic acid at 25°C and a stirring speed of 100-1000r / min. L, the ratio of metal inorganic salt and 1,4-naphthalene dicarboxylic acid ligand is 2:1, continue to stir for 20min, obtain the turbid solution containing metal ion complex;

[0040] 2. Transfer 30mL of the turbid liquid obtained in Step 1 to a 50mL autoclave, conduct a solvothermal reaction at 180°C for 24 hours, cool to 25°C, separate the reactant to obtain a sample, wash the sample and dry it in an oven at 60°C 6h obtains the precursor of the vanadium-based metal-organic framework complex;

[0041] 3. Under the protection of an inert gas, place the precursor obtained in step 2 in a tube furnace, rai...

Embodiment 2

[0051] A new type of catalyst material for the negative electrode material of sodium ion battery, a vanadium carbide / porous carbon nanorod composite formed by high-temperature carbonization of a metal-organic framework complex. The difference between this embodiment and the specific embodiment 1 is: step 3 The constant temperature is 800°C. Other steps and parameter are identical with specific embodiment 1.

[0052] A morphology test was performed on the vanadium carbide / porous carbon nanorods obtained in Example 2 of the present invention.

[0053] Figure 8 It is the SEM picture of vanadium carbide / porous carbon. It can be seen from the picture that the microscopic appearance of the product is a nanorod with a directional crack pore structure, uniform in size, about 100nm in diameter, and about 500nm in length.

Embodiment 3

[0055] A new catalyst material for the negative electrode material of a sodium ion battery, a cobalt vanadium oxide / porous carbon nanorod composite formed by a metal-organic framework complex through high-temperature carbonization. The difference between this embodiment and the specific embodiment 1 is: the steps One vanadium chloride solution was replaced by the same molar cobalt salt. Other steps and parameter are identical with specific embodiment 1.

[0056] A morphology test was performed on the cobalt vanadium oxide / porous carbon nanorods obtained in Example 3 of the present invention.

[0057] Figure 9 It is the SEM picture of cobalt vanadium oxide / porous carbon. It can be seen from the picture that the microscopic appearance of the product is a nanorod with a cracked pore structure. The diameter is about 500nm and the length is about 1.5μm.

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Abstract

The invention discloses a method for preparing a metallic compound / porous carbon nanorod of a hierarchy structure, and belongs to the technical field of new energy. The method comprises the following steps: firstly, mixing inorganic transition metal salt, 1,4-naphthalic acid and water so as to obtain a turbid solution of an organic acid complex of metal ions; secondly, under a high-temperature hydrothermal condition, performing reaction for a certain period of time so as to generate a precursor of a metal organic frame; and finally, in the protection of an inert gas, performing high-temperature thermal treatment control, thereby obtaining the metallic compound / porous carbon nanorod. As a sodium-ion battery negative material, the metallic compound / porous carbon nanorod shows excellent multiplying power characteristic and cycling stability. The method has the advantages of being simple in preparation process, low in equipment requirement, rich in raw material resource, low in production cost, short in synthesis cycle, gentle in reaction condition, high in yield, free of template removal, good in material property and the like, industrial production can be easily achieved, and a product can be used in the field of electrochemical energy storage.

Description

technical field [0001] The invention relates to a method for synthesizing a negative electrode material of a sodium ion battery with a hierarchical structure using a metal-organic framework as a precursor, and belongs to the technical field of new energy sources. Background technique [0002] With the development of human society, the shortage of traditional energy has gradually become one of the urgent problems facing the world. People realize that the development of renewable energy and energy storage systems is the key to solving problems such as energy shortage and environmental pollution. In recent decades, lithium-ion batteries have become the giants of modern chemical power sources, successfully commercialized in powering automobiles. However, with the maturity of lithium-ion battery technology and the limitation of theoretical capacity, it has been difficult to greatly improve its performance. At the same time, the wide application of lithium-ion batteries has led ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/52H01M4/583H01M4/587H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/48H01M4/52H01M4/583H01M4/587H01M10/054Y02E60/10
Inventor 卜显和孔令俊王超鹏
Owner NANKAI UNIV
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