anode electrode comprising carbon structure having three-dimensional network structure

Carbon precursor cathode electrode with improved electrical conductivity

This technology is related to a method of manufacturing a cathode electrode including a carbon structure with a three-dimensional network structure.

The goal to solve is to provide a cathode electrode with improved electrical conductivity during charging and discharging. To this end, we propose a carbon precursor cathode with a three-dimensional network structure in which main fibers randomly cross each other.

The lithium secondary battery into which the cathode electrode according to this technology is inserted performs a long charge and discharge cycle. Meanwhile, it shows excellent characteristics of improved CE (coulombic efficiency) and stability due to the pores and chalcogen functional groups provided on the surface and inside of the main fiber of the cathode electrode.

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Key Features:

• The core principle is a three-dimensional network structure in which the main fibers of the carbon structure randomly intersect each other.
• Provides secondary pores and chalcogen functional groups larger than the size of the primary pores on the surface and inside the main fibers.
• Chalcogen functional groups contain chalcogen elements (S, Te, Se), carbon, or oxygen.
• During charge-discharge cycles, the generation of byproducts containing Li2CO3 is reduced due to the chalcogen functional groups within the cathode electrode.

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This technology was developed through research support from the National Research Foundation of Korea to identify the formation mechanism and redox characteristics of highly functional pyropolymers rich in pi electrons.

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