Carbon nanotube bundled multi-walled structures are widely utilized in advanced materials due to their exceptional mechanical, electrical, and thermal properties. In electronics, they serve as conductive additives in composites, enhancing the performance of batteries, supercapacitors, and flexible displays. Their high strength and lightweight nature make them ideal for reinforcing polymers in aerospace and automotive industries, improving durability and reducing weight. In energy storage, they are used as electrodes in lithium-ion batteries, offering increased conductivity and capacity. Additionally, their thermal conductivity is leveraged in heat management systems for electronic devices. In biomedical applications, they are explored for drug delivery systems and biosensors due to their unique structural and functional characteristics.