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Preparation method of metal oxide/sulfide and ordered mesoporous carbon composite energy-storage material

A composite energy storage material and sulfide technology, which is applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of reduced packing density, easy pulverization, and reduced material volume energy density to achieve electrochemical performance The effect of lifting and high specific surface area

Active Publication Date: 2014-07-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the first method of preparing a hollow structure greatly reduces the filling density per unit volume, thereby reducing the volumetric energy density of the material; the second method of compounding with carbon materials mostly simply mixes the two mechanically. , how to combine transition metal oxides and carbon materials in a better way remains to be further studied; the conductivity of the third mixed transition metal oxides is only to a certain extent compared to single metal oxides, and its conductivity is still It needs to be improved, and there is still the problem of easy pulverization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment includes the following steps:

[0018] The first step: Based on the solution method or hydrothermal method, metal oxide / sulfide nanosheets are constructed on the ordered mesoporous carbon material CMK-3 to obtain the metal oxide / sulfide precursor CMK-3.

[0019] Step 2: Calcinate the dried metal oxide / sulfide precursor CMK-3 in a muffle furnace at 500°C for 6 hours with a heating rate of 1°C min -1 ; The obtained powder is the metal oxide / sulfide CMK-3 composite energy storage material.

[0020] Step 1 Prepare the metal oxide / sulfide precursor CMK-3 by solution method, specifically: weigh 100 mg ordered mesoporous carbon CMK-3 into a flask, then add 0.01 mmol sodium citrate and 0.3 mmol hexamethylene Tetramine, 1mmol metal Ni nitrate, 10ml deionized water, ultrasonically dispersed for 30 minutes, and then stirred and reacted at 100°C for 5 hours to obtain the metal oxide precursor CMK-3, which was washed 3 times with ethanol and washed with a high-speed...

Embodiment 2

[0023] Similar to Example 1, the difference is that step 1 of this example uses a solution method to prepare the metal oxide / sulfide precursor CMK-3, specifically:

[0024] Weigh 50mg of ordered mesoporous carbon CMK-3 into a flask, then add 0.05mmol sodium citrate, 1mmol hexamethylenetetramine, 0.1mmol metal Co nitrate, 70ml deionized water, and ultrasonically disperse for 10 minutes. Then stirred and reacted at 20°C for 15 hours to obtain the metal oxide precursor CMK-3, which was washed 5 times with ethanol, separated with a high-speed centrifuge, and finally dried at room temperature; the ultrasonic power was 250W; the stirring speed It is 400r / m.

Embodiment 3

[0026] Similar to Example 1, the difference is that step 1 of this example uses a solution method to prepare the metal oxide / sulfide precursor CMK-3, specifically:

[0027] Weigh 5mg ordered mesoporous carbon CMK-3 into a flask, then add 0.03mmol sodium citrate, 0.5mmol hexamethylenetetramine, 0.01mmol metal Zn nitrate, 30ml deionized water, and ultrasonically disperse for 1 minute , and then stirred and reacted at 50°C for 2 hours to obtain the metal oxide precursor CMK-3, which was washed 6 times with ethanol, separated with a high-speed centrifuge, and finally dried at room temperature; the ultrasonic power was 250W; stirring The speed is 400r / m.

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Abstract

The invention discloses a preparation method of a metal oxide / sulfide and ordered mesoporous carbon composite energy-storage material. The preparation method comprises the following steps: firstly, synthesizing a metal oxide / sulfide precursor-@CMK-3 composite in a round-bottom flask / reaction kettle by adopting a simple solution / hydrothermal process, and then calcining the composite in nitrogen gas to obtain the metal oxide / sulfide and ordered mesoporous carbon (CMK-3) composite energy-storage material. The preparation method is characterized in that the energy-storage material is prepared by adopting a simple chemical synthesis means, and the energy-storage material is easy to separate and has a mesoporous characteristic, a high specific surface area and electrochemical properties superior to that of common metal oxide / sulfide and carbon materials.

Description

technical field [0001] The present invention relates to a preparation method of a composite energy storage material, in particular to a preparation method of an inorganic metal oxide / sulfide and ordered mesoporous carbon composite energy storage material, specifically nickel oxide, cobalt oxide, tricobalt tetroxide, zinc oxide, A preparation method of manganese dioxide, nickel cobaltate, zinc cobaltate, titanium dioxide, tin dioxide and molybdenum sulfide nanosheets and ordered mesoporous carbon (CMK-3). technical background [0002] As an important energy storage device in various electronic products, lithium-ion batteries are widely used in mobile phones, laptops and other portable electronics due to their advantages such as rechargeable, clean, small size, high working voltage, high energy density and low self-discharge rate. Products, sometimes even can be used in more high-end fields such as hybrid vehicles and smart grids. However, lithium-ion batteries also have many...

Claims

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Application Information

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IPC IPC(8): H01M4/1393H01M4/48
CPCH01M4/366H01M4/483H01M4/5815H01M4/625H01M10/0525Y02E60/10
Inventor 丁书江范昭阳
Owner XI AN JIAOTONG UNIV
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