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Iron-nickel alloy/carbon nanotube composite material and preparation method thereof

A technology of carbon nanotubes and composite materials, applied in the directions of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems of easy occurrence of shuttle effect, inactive chemical properties, etc., and achieve good electron transmission path and mechanical strength. Avoid the shuttle effect, the effect of cheap and easy-to-obtain raw materials

Pending Publication Date: 2022-01-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the vast majority of carbon materials are porous carbon with an open pore structure, non-polar substances with inactive chemical properties, which cannot effectively suppress the loss of sodium and potassium ions during long-term charge-discharge cycles, and are prone to shuttle effects.

Method used

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  • Iron-nickel alloy/carbon nanotube composite material and preparation method thereof
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  • Iron-nickel alloy/carbon nanotube composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Mix iron ammonium oxalate, nickel nitrate and melamine according to the molar ratio of iron, nickel and carbon atoms at 1:10:50, and grind them in a mortar for 20 minutes to obtain mixture A;

[0029] (2) Put the mixture A into a high-temperature tube furnace, inject 100 sccm of flowing argon gas, first rapidly raise the temperature from room temperature to 200°C at a heating rate of 20°C / min, keep it warm for 0.5h, and then heat it at a rate of 5°C / min The heating rate is slowly raised to 600°C, cooled naturally until the temperature drops to room temperature, and the product B is obtained;

[0030] (3), first fully grind the product B, then seal the ground product B in a glass bottle full of argon through the glove box, then put the glass bottle with the product B into a microwave muffle furnace, and heat it to 200 °C, and after heating, cool to room temperature at a cooling rate of 20 °C / min to obtain an iron-nickel alloy / carbon nanotube composite material.

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Embodiment 2

[0034] (1) Mix ferrous sulfate, nickel sulfate and urea according to the molar ratio of iron, nickel, and carbon atoms in a ratio of 1:5:20, and grind them in a mortar for 20 minutes to obtain mixture A;

[0035] (2) Put the mixture A into a high-temperature tube furnace, inject 100 sccm of flowing argon, first rapidly raise the temperature from room temperature to 200°C at a heating rate of 25°C / min, keep it warm for 0.8h, and then heat it up at a rate of 2°C / min. The heating rate was slowly raised to 650°C, cooled naturally until the temperature dropped to room temperature, and the product B was obtained;

[0036] (3), first fully grind the product B, then seal the ground product B in a glass bottle full of argon through the glove box, then put the glass bottle containing the product B into a microwave muffle furnace, and heat it to 300 °C, and after heating, cool to room temperature at a cooling rate of 20 °C / min to obtain an iron-nickel alloy / carbon nanotube composite mate...

Embodiment 3

[0038] (1) Mix ferrous chloride, nickel chloride and melamine according to the molar ratio of iron, nickel and carbon atoms in a ratio of 1:15:30, and grind in a mortar for 20 minutes to obtain mixture A;

[0039] (2) Put the mixture A into a high-temperature tube furnace, inject 100 sccm of flowing argon gas, first rapidly raise the temperature from room temperature to 150°C at a heating rate of 30°C / min, keep it warm for 1h, and then raise the temperature at a rate of 4°C / min Slowly raise the temperature to 700°C, cool naturally until the temperature drops to room temperature, and take out to obtain product B;

[0040] (3), first fully grind the product B, then seal the ground product B in a glass bottle full of argon through the glove box, then put the glass bottle containing the product B into a microwave muffle furnace, and heat it to 400 °C, and after heating, cool to room temperature at a cooling rate of 20 °C / min to obtain an iron-nickel alloy / carbon nanotube composite...

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Abstract

The invention discloses an iron-nickel alloy / carbon nanotube composite material and a preparation method thereof. The preparation method comprises the following steps: mixing 1, an iron source, a nickel source and a carbon source according to the substance amount ratio of iron atoms to nickel atoms to carbon atoms being 1: (5-20): (20-50), fully grinding, and obtaining a mixture A; (2) putting the mixture A into a reactor, introducing inert gas, heating to 150-200 DEG C from room temperature at a heating rate of 20-30 DEG C / min, preserving heat for 0.5-1 hour, heating to 600-700 DEG C at a heating rate of 1-5 DEG C / min, and naturally cooling to room temperature to obtain a product B; and (3) grinding the product B, sealing the ground product B in a glass bottle filled with inert gas through a glove box, putting the glass bottle filled with the product B into a microwave muffle furnace, heating to 200-400 DEG C, and cooling to normal temperature at the speed of 20 DEG C / min after heating to obtain the iron-nickel alloy / carbon nanotube composite material. The growth of the carbon nanotubes is catalyzed by iron and nickel, so that the internal stability and conductivity of the carbon nanotubes are improved, and the specific capacity and storage performance of the battery can be improved.

Description

technical field [0001] The invention relates to a carbon nanotube composite material and a preparation method thereof, in particular to an iron-nickel alloy / carbon nanotube composite material and a preparation method thereof. Background technique [0002] Today, energy storage plays an important role in mobile electronic devices, various electric vehicles and grid-scale renewable energy storage intermediates, due to limited sources of lithium, prices have skyrocketed in recent years, however, reserves of sodium and potassium in the ocean Very abundant, so rechargeable Na-ion batteries and Potassium-ion batteries have attracted a lot of research. The development of electrode materials and electrolytes for SIBs / PIBs is very important for better integration of renewable resources in large-scale energy storage systems, and is expected to become a new generation of high energy density and low-cost electrochemical energy storage systems. However, due to the large K radius and slo...

Claims

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Application Information

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IPC IPC(8): H01M4/62C01B32/16
CPCH01M4/62H01M4/625H01M4/628C01B32/16C01B2202/36Y02E60/10Y02P20/133
Inventor 李嘉胤钱程胡云飞黄剑锋曹丽云郑裕欣张帅赵松博
Owner SHAANXI UNIV OF SCI & TECH
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