Teaching of Nanocomposite Materials： Preparation and Performance Study of Ni-Cu Sulfide/Polyaniline Composite Electrodes

Taking supercapacitor electrode materials as the teaching entry point， this approach addresses the limitations of traditional transition metal sulfides in high-current-density electrochemical performance. By integrating cutting-edge techniques， combining hydrothermal synthesis with electrochemical deposition into teaching practice， an experimental design for preparing nickel-copper sulfide/polyaniline （Ni17CuS20/PANI） nanocomposite electrodes was developed. Compared to foundational experimental teaching content， this experiment represents advanced research training. Through scanning electron microscopy （SEM）， X-ray photoelectron spectroscopy （XPS）， and techniques such as constant current charge-discharge testing （GCD）， cyclic voltammetry （CV）， and electrochemical impedance spectroscopy （EIS）， students are guided to analyze the material’s morphology， elemental composition， and electrochemical performance， gaining a deeper understanding of the structure-property relationship. Experimental results demonstrate that the synergistic interaction between the three-dimensional crosslinked structure of Ni17CuS20/PANI and PANI significantly enhances charge transport efficiency and electrolyte accessibility， thereby improving the material’s cycling stability and specific capacity. The flexible asymmetric supercapacitor constructed from this composite material exhibits a high energy density of 23.78 Wh/kg at a power density of 311.54 W/kg， validating its potential for practical applications. This research training experiment not only highlights the cutting-edge nature of materials science but also emphasizes the multidisciplinary nature of experimental teaching. Furthermore， it establishes a comprehensive teaching system encompassing “theory-preparation-characterization-application.” Through such advanced research training， students can comprehensively master skills in material synthesis， performance testing， data analysis， and innovative design， cultivating scientific thinking and engineering practice capabilities. This provides new insights and methodologies for experimental teaching reform in new energy device courses.