Preparation method of lithium air battery electrode

A lithium-air battery and electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reducing battery energy density and increasing positive electrode impedance, and achieve the effect of improving energy density, improving conductivity and good effect.

Active Publication Date: 2014-12-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of these materials greatly reduces the energy density of the battery, not only that, but the use of binders will also cause an increase in the positive electrode impedance

Method used

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  • Preparation method of lithium air battery electrode
  • Preparation method of lithium air battery electrode
  • Preparation method of lithium air battery electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 0.1 g of polyaniline and 0.1 g of ferric hydroxide were deposited or grown on the surface of a filter paper with a thickness of 20 microns and a mass of 0.02 g by liquid phase deposition, and dried to obtain a catalyst precursor / nitrogen-containing conductive polymer composite paper sheet. The obtained catalyst precursor / nitrogen-containing conductive polymer composite paper sheet was put into a potassium hydroxide solution containing 0.2 gram of urea (0.6 gram of potassium hydroxide) and immersed for a period of time, then placed in a protective nitrogen atmosphere, and carbonized at 800°C and nitriding for 5 hours to obtain a nitrogen-containing 18 wt% metal nitride / nitrogen-containing hierarchical hole carbon composite electrode with a three-dimensional carbon fiber network structure as a self-supporting body. The electrode prepared in this example and the lithium negative electrode were assembled into a button battery, and a constant current charge and discharge test...

Embodiment 2

[0041] 0.1 g of polydopamine and 0.05 g of cobalt oxide were deposited or grown on the surface of a printing paper with a thickness of 50 microns and a mass of 0.075 g by liquid phase deposition, and dried to obtain a catalyst precursor / nitrogen-containing conductive polymer composite paper sheet. The obtained catalyst precursor / nitrogen-containing conductive polymer composite paper sheet was put into a sodium hydroxide solution containing 0.3 gram of melamine (0.4 gram of sodium hydroxide) and immersed for a period of time, then placed in a protective nitrogen atmosphere, and carbonized at 900°C and nitriding for 10 hours to obtain a nitrogen-containing 25 wt% metal nitride / nitrogen-containing hierarchical hole carbon composite electrode with a three-dimensional carbon fiber network structure as a self-supporting body. The electrode prepared in this example and the lithium negative electrode were assembled into a button battery, and a constant current charge and discharge test...

Embodiment 3

[0043] 0.05 g of polypyrrole and 0.2 g of nickel oxide were deposited or grown on the surface of writing paper with a thickness of 10 microns and a mass of 0.05 g by liquid phase deposition, and dried to obtain a catalyst precursor / nitrogen-containing conductive polymer composite paper sheet. The obtained catalyst precursor / nitrogen-containing conductive polymer composite paper sheet was put into a lithium hydroxide solution containing 0.2 gram of melamine (0.5 gram of lithium hydroxide) and immersed for a period of time, then placed in a protective nitrogen atmosphere, and carbonized at 700 ° C and nitriding for 2 hours to obtain a nitrogen-containing 15 wt% metal nitride / nitrogen-containing hierarchical hole carbon composite electrode with a three-dimensional carbon fiber network structure as a self-supporting body. The electrode prepared in this example and the lithium negative electrode were assembled into a button battery, and a constant current charge and discharge test w...

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Abstract

The invention discloses a preparation method of a lithium air battery electrode. The preparation method of the lithium air battery electrode comprises the following steps: sequentially growing or depositing a nitrogen-containing conductive polymer and a catalyst precursor on the surface of a piece of paper to obtain a piece of catalyst precursor/nitrogen-containing conductive polymer compound paper; putting the catalyst precursor/nitrogen-containing conductive polymer compound paper into an alkali solution containing nitrogen-containing organic matters for dipping, then putting the paper in a protection atmosphere for carbonizing and nitriding so as to obtain a metal nitride/nitrogen-containing layered porous carbon compound electrode by using a one-step method, wherein the metal nitride/nitrogen-containing layered porous carbon compound electrode is excellent in mechanical performance and electrochemical performance and high in energy density and uses a three-dimensional carbon fiber network structure as a self-supporting body. The compound electrode is capable of effectively reducing the charging and discharging polarization of the air battery and reducing the internal resistance of the battery. Compared with a conventional electrode preparation process, an adhesive and a coating process do not need to be used; the preparation method is easy to operate, environmentally-friendly, low in cost and capable of achieving the industrial production.

Description

technical field [0001] The invention relates to a preparation method of a lithium-air battery electrode, belonging to the field of lithium batteries. Background technique [0002] With the rapid development of the global economy, the human demand for energy is getting higher and higher, while the non-renewability of traditional fossil fuel energy and the pollution caused by fossil fuel combustion are becoming more and more prominent. The development of new energy technologies has gradually become a human priority. Focus on focus and research hotspots. In recent decades, with the commercial success of lithium-ion batteries, research on lithium-based high-performance chemical power sources has intensified. [0003] Due to its very high energy density, lithium-air batteries have become the most potential future generation of energy storage power sources. Lithium-air batteries are a battery system in which metallic lithium is used as the negative electrode, a porous electrode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8605H01M4/8807H01M4/8878H01M4/8882H01M4/9016H01M4/9083Y02E60/50
Inventor 张治安陈巍蒋绍峰李强甘永青赖延清李劼
Owner CENT SOUTH UNIV
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