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Stable nitrogen-doped carbon nanotube and iron oxide composite anode material and preparation method thereof

A nitrogen-doped carbon and negative electrode material technology, applied in battery electrodes, electrochemical generators, electrical components, etc., can solve the problems of poor cycle performance and drastic volume changes, and achieve improved rate performance, simple preparation process, and improved pumping. The effect of sub-charge and discharge efficiency

Inactive Publication Date: 2016-03-02
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, we conveniently constructed Fe 2 o 3 / NCNTs micro-nano composite structure in anticipation of solving Fe 2 o 3 In the process of charging and discharging, the volume changes drastically, which leads to the problem of poor cycle performance

Method used

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  • Stable nitrogen-doped carbon nanotube and iron oxide composite anode material and preparation method thereof
  • Stable nitrogen-doped carbon nanotube and iron oxide composite anode material and preparation method thereof
  • Stable nitrogen-doped carbon nanotube and iron oxide composite anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: with FeCl 3 Preparation of 10% Fe for iron source 2 o 3 / NCNTs composite material as an example

[0033] First, weigh 5 g of FeCl 3 ·6H 2 O was put into a beaker, added 20 milliliters of deionized water, stirred and dissolved to obtain FeCl 3 solution. Next, add 250ml of deionized water into a 500ml beaker, and move to an oil bath to boil. Then, under stirring, the FeCl 3 The solution was added dropwise to the above boiling liquid until a reddish-brown colloid appeared, then stopped heating and stirring. Dialyze the above-mentioned colloid through a semi-permeable membrane and transfer it into a beaker. Under stirring, add a slurry with a solid content of 50% nitrogen-doped carbon nanotubes of 12.87 grams, continue stirring for 10 hours, and then place it in an oven for drying after 10 hours of ultrasonic treatment. . Finally, the dried sample was treated at 500°C for 5 hours under an Ar flow of 100 sccm, and then cooled to obtain 40% Fe 2 o 3 / ...

Embodiment 2

[0034] Embodiment 2: with FeCl 3 Preparation of 40% Fe for iron source 2 o 3 / NCNTs composite material as an example

[0035] First, weigh 5 g of FeCl 3 ·6H 2O was put into a beaker, added 20 milliliters of deionized water, stirred and dissolved to obtain FeCl 3 solution. Next, add 250ml of deionized water into a 500ml beaker, and move to an oil bath to boil. Then, under stirring, the FeCl 3 The solution was added dropwise to the above boiling liquid until a reddish-brown colloid appeared, then stopped heating and stirring. Dialyze the above colloid through a semi-permeable membrane and move it into a beaker. Under stirring, add a slurry with a solid content of 50% nitrogen-doped carbon nanotubes of 2.144 grams, continue stirring for 10 hours and then ultrasonically treat it for 10 hours, then place it in an oven for drying . Finally, the dried sample was treated at 500°C for 5 hours under an Ar flow of 100 sccm, and then cooled to obtain 40% Fe 2 o 3 / NCNTs composi...

Embodiment 3

[0036] Embodiment 3: with FeCl 3 Preparation of 50% Fe for iron source 2 o 3 / NCNTs composite material as an example

[0037] First, weigh 5 g of FeCl 3 ·6H 2 O was put into a beaker, added 20 milliliters of deionized water, stirred and dissolved to obtain FeCl 3 solution. Next, add 250ml of deionized water into a 500ml beaker, and move to an oil bath to boil. Then, under stirring, the FeCl 3 The solution was added dropwise to the above boiling liquid until a reddish-brown colloid appeared, then stopped heating and stirring. Dialyze the above-mentioned colloid through a semi-permeable membrane and move it into a beaker. Under stirring, add a slurry with a solid content of 50% nitrogen-doped carbon nanotubes of 1.43 grams, continue stirring for 10 hours, and then place it in an oven for drying after 10 hours of ultrasonic treatment. . Finally, the dried sample was treated at 500°C for 5 h under 100 sccm Ar flow and then cooled to obtain 50% Fe 2 o 3 / NCNTs composites...

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Abstract

The invention relates to the field of new energy materials and electrochemistry, in particular to a stable nitrogen-doped carbon nanotube and iron oxide composite anode material and a preparation method thereof. With a nitrogen-doped carbon nanotube as a main body, the stable nitrogen-doped carbon nanotube and iron oxide composite anode material is characterized in that iron oxide particles are loaded on the outer surface of the nitrogen-doped carbon nanotube, wherein the iron oxide is a main component; and the load amount of the iron oxide accounts for 10%-90% of total weight of the iron oxide particles and the nitrogen-doped carbon nanotube. The stable nitrogen-doped carbon nanotube and iron oxide composite anode material is simple in preparation technology, low in production cost, friendly to environment, high in safety and good in experimental repeatability.

Description

(1) Technical field [0001] The invention relates to the fields of new energy materials and electrochemistry, in particular to a stable nitrogen-doped carbon nanotube and iron oxide composite negative electrode material and a preparation method thereof. (2) Background technology [0002] The main disadvantages of carbon anode materials currently used in industry (such as: natural graphite, artificial graphite) are low actual capacity and poor rate performance, and the assembled batteries are far from meeting the current actual needs, especially for power batteries. need( Nature 2000, 28:407). In order to meet the needs of high-energy power sources, it is of great significance to explore new lithium-ion battery anode materials with high capacity and long life to replace the current low-capacity graphite anode materials. [0003] Fe 2 o 3 As a negative electrode material for lithium-ion batteries, the theoretical specific capacity can reach 1005mAh / g, which is much higher t...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/525H01M4/625H01M10/0525H01M2004/021Y02E60/10
Inventor 吕金钊李进潘程浩然李延锋赵成龙王瑛王胜伟
Owner SHANDONG YUHUANG NEW ENERGY TECH
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