Method for Preparing a Self-Fused CuS Anode Having a Three-Dimensional Nanoporous Structure, Composition for Preparing the Same, Self-Fused CuS Anode Having a Three-Dimensional Nanoporous Structure, and Sodium Secondary Battery Including the Same

Three-Dimensional Nanoporous CuS Anode Technology for Sodium Batteries

This technology relates to a self-fused CuS anode having a three-dimensional nanoporous structure, designed to improve storage capacity and cycle life in sodium secondary batteries.

Conventional copper sulfide anodes have suffered from low capacity and rapid performance degradation, limiting practical use. This technology improves both active-material loading and ion-diffusion characteristics through composition design, anode formation on a current collector, and conversion into a three-dimensional porous structure.

As a result, it can improve the capacity retention and long-term cycling characteristics of CuS anodes, contributing to higher-performance sodium secondary batteries.

Key Features:

• It enlarges the reaction area by converting a self-fused CuS anode into a three-dimensional nanoporous structure.
• It improves electrode structural stability and reactivity through a combination of a PAA binder and a DME electrolyte.
• It realizes an anode structure advantageous for sodium-ion diffusion and accommodation of electrode volume change.