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

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Problems solved by technology

Such materials usually have high capacity, but the unfavorable reversibility o

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

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Example Embodiment

[0037] Example 1:

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

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

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

[0041] 3. Under the protection of inert gas, place the precurs...

Example Embodiment

[0050] Example 2:

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

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

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

Example Embodiment

[0054] Example 3:

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

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

[0057] Picture 9 It is the SEM image of cobalt vanadium oxide / porous carbon. It can be seen from the figure that the microstructure of the product is nanorods with 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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