Carbon nanotube bundled multi-walled structures are widely utilized in advanced materials and electronics due to their exceptional mechanical, electrical, and thermal properties. In the field of electronics, they are employed as conductive additives in composites, enhancing the conductivity of materials used in batteries, supercapacitors, and flexible electronics. Their high surface area and strength make them ideal for reinforcing polymers, ceramics, and metals, resulting in lightweight yet durable materials for aerospace, automotive, and construction industries. Additionally, they are used in sensors and actuators due to their sensitivity to environmental changes, enabling precise detection of gases, pressure, and temperature. In energy storage, they improve the performance of electrodes in lithium-ion batteries and fuel cells by facilitating faster electron transfer and higher capacity. Their thermal conductivity also finds applications in heat dissipation systems for electronic devices, ensuring efficient thermal management.