Ni coated multi-walled carbon nanotubes are widely used in various advanced applications due to their unique properties. They serve as efficient catalysts in chemical reactions, particularly in hydrogenation and dehydrogenation processes, owing to the nickel coating that enhances catalytic activity. In the field of energy storage, these nanotubes are incorporated into electrodes for supercapacitors and lithium-ion batteries, improving conductivity and energy density. They are also utilized in electromagnetic interference shielding, where the nickel coating provides excellent absorption of electromagnetic waves, making them suitable for use in electronic devices and aerospace components. Additionally, their mechanical strength and electrical conductivity make them ideal for reinforcing composite materials, enhancing the performance of polymers and ceramics in industrial, structural, and automotive applications. In biomedical fields, they are employed in biosensors and drug delivery systems to improve detection accuracy and controlled release mechanisms.