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Lithium nitrogen oxygen battery with Fe nanoparticles and carbon composite as positive-electrode catalyst

A nanoparticle and composite material technology, which is used in fuel cell-type half cells and secondary battery-type half cells, battery electrodes, circuits, etc. The effect of electrical conductivity and high specific capacity

Active Publication Date: 2019-01-29
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the lithium nitrogen oxygen battery system, there is no research on the positive electrode catalyst

Method used

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  • Lithium nitrogen oxygen battery with Fe nanoparticles and carbon composite as positive-electrode catalyst
  • Lithium nitrogen oxygen battery with Fe nanoparticles and carbon composite as positive-electrode catalyst
  • Lithium nitrogen oxygen battery with Fe nanoparticles and carbon composite as positive-electrode catalyst

Examples

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Effect test

Embodiment 1

[0027] A lithium-nitrogen-oxygen battery using Fe / Kb as a catalyst, including iron nanoparticles highly dispersed on Ketjen black (EC-600JD Japan Lion King), this material is synthesized by hydrothermal method, the steps are: Ketjen black 50mg, Take 0.4g of ferric nitrate, 0.819g of urea, and 35mL of ethylene glycol, stir evenly at room temperature for 3h, sonicate for 1h, pour into the reaction kettle, and keep in an oven at 200°C for 4h; wash with ethanol until the supernatant is clear, take out the sample, Dry in an oven at 80°C for 24h; pre-calcine at 350°C for 3h in an argon atmosphere, then calcine at 750°C for 8h, and take it out of the tube furnace to prepare the Fe / Kb composite catalyst. The resulting composites were characterized as Figure 1-3 .

[0028] The catalyst is used to prepare the positive electrode sheet, and the steps are as follows: 1) Dissolve the Fe / Kb composite material and polyvinylidene fluoride (PVDF) in nitrogen methyl pyrrolidone (NMP) at a rati...

Embodiment 2

[0036] A new catalyst material for lithium-nitrogen-oxygen batteries, including iron nanoparticles highly dispersed on carbon nanotubes (Fe / CNTs). The material is synthesized by a hydrothermal method. The steps are: take 0.2 g of iron nitrate and 0.4 g of urea , 25 mg of carbon nanotubes (XFM40 Nanjing Pioneer Nano), dissolved in 35 ml of ethylene glycol, stirred at room temperature for 3 h, ultrasonicated for 1 h; poured into the reaction kettle, kept in an oven at 200 ° C for 4 h; washed with ethanol, until the supernatant The liquid is clarified, the sample is taken out, dried in an oven at 80°C for 24h, pre-calcined at 350°C for 3h in an argon atmosphere, then calcined at 750°C for 8h, and taken out from the tube furnace to obtain Fe / CNTs composite catalyst.

[0037] The catalyst is used to prepare the positive electrode sheet, and the steps are as follows: 1) Dissolve Fe / CNTs and PVDF in nitrogen methyl pyrrolidone (NMP) at a ratio of 90:10 by mass percentage, and mix th...

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Abstract

The invention relates to a lithium nitrogen oxygen battery with Fe nanoparticles and a Keqin black composite as a positive-electrode catalyst. The catalyst is a composite material with metal iron nanoparticles highly dispersed on nano carbon. An environment-friendly agent is adopted, the synthesized composite material can serve as the catalyst used for preparing a positive electrode of the lithiumnitrogen oxygen battery, and the method includes the following steps that the catalyst, a binder and a solvent are mixed evenly, conductive carbon paper is evenly coated with mixture, and the positive electrode of the lithium nitrogen oxygen battery is obtained after drying. The battery has the advantages that the catalyst can improve the electrocatalytic performance of the battery, meanwhile thebattery has good cycle stability, and the battery assembled by the material has high specific energy in air; moreover, the preparation process of the catalyst is simple, the sources are cheap and easy to obtain, and the catalyst is environmentally friendly, has a great assistant effect on improving the performance of the lithium nitrogen oxygen battery and has a potential for wide use.

Description

technical field [0001] The invention relates to a lithium-nitrogen-oxygen battery with Fe nano particles and carbon composite material as the positive electrode catalyst. Background technique [0002] Lithium-air batteries have high potential to be used in real life because of their high specific energy, no pollution, stable discharge platform and other advantages. With the rapid development of modern society, people's demand for battery systems with high energy storage is also increasing. The lithium-air battery has the highest specific energy, and it will play a huge role if it is applied to electronic equipment, communication devices and other fields. However, there are still many technical problems to be solved in the current lithium-air battery, such as low charge and discharge efficiency, high charging overvoltage, and the use of pure oxygen as the working atmosphere. The cost of the lithium-air battery is increased, and the application range of the lithium-air batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/08
CPCH01M4/9041H01M4/9083H01M12/08Y02E60/10
Inventor 周震王新改谢召军
Owner NANKAI UNIV
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