Electrical Behavior of Graphite-Based Composite Anodes in Lithium-Ion Cells

Abstract

Lithium-ion batteries face critical challenges due to the deposition of layers on the anode surface during charge-discharge cycles, which significantly reduces electrochemical efficiency and lifespan. This study developed a graphite anode through the combination of nano-black carbon and/or carbon nanotube additives to improve electrical characteristics for overcoming this challenge. The final anode structure was fabricated by blending the materials, which they applied onto copper before conducting the drying and compaction procedures. Electrochemical testing measured capacitance, resistance, dielectric constant, and phase shift at diverse alternating potential (AC) frequencies from 20 kHz to 100 kHz. Electrical tests revealed improved performance metrics in the anode through enhanced capacitance readings and lower resistances while achieving frequency spectrum dielectric constant stability. The combination of nano-carbon elements or carbon nanotubes within the anode structure produced superior electrochemical properties, which led to extended battery usage times.