Method of manufacturing carbon nanofibers for lithium-sulfur battery cathode, lithium-sulfur battery cathode material and lithium-sulfur battery comprising the same

Lithium-sulfur battery cathode material with improved electrochemical stability

This technology is about a material for a lithium-sulfur battery anode, and is about a lithium-sulfur battery using carbon nanofibers doped with iron and nitrogen.

During the charging and discharging process, polysulfide with lithium as an end dissolves in the electrolyte and moves between the anode and the cathode, resulting in loss of anode active material and deterioration of cycling performance due to the shuttle effect. This technology solves these problems through carbon nanofibers doped with iron and nitrogen. I suggest.

The manufacturing method of iron and nitrogen-doped carbon nanofibers according to this technology has excellent physicochemical adsorption performance for lithium polysulfide through improved porosity and increased polarity within the structure, making it possible to implement lithium sulfur batteries with improved electrochemical stability, making it a necessary technology for new secondary batteries.

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Key Features:

• Manufacturing a metal organic framework (MOF) containing iron, and nanofibers containing nitrogen
• Carbon nanofibers doped with iron and nitrogen are obtained by heat-treating the nanofibers, and the metal-organic framework is characterized by growing on the surface of the nanofibers
• Preparing precursor nanofibers by electrospinning an electrospinning solution containing a nitrogen-containing polymer, an iron precursor, and a solvent
• Organic ligand solution Forming a metal-organic framework by immersing the precursor nanofibers in an iron precursor solution

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This technology was developed through support from the National Research Foundation of Korea's functional interface structure research project for lithium cathode-based high-capacity energy storage.

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