Ni-coated multi-walled carbon nanotubes are widely used in various advanced applications due to their unique properties. In electronics, they serve as conductive fillers in composites, enhancing electrical conductivity in materials like polymers and coatings. They are also employed in energy storage devices, such as supercapacitors and lithium-ion batteries, where they improve electrode performance by increasing surface area and charge transfer efficiency. Additionally, these nanotubes are utilized in catalysis, particularly in hydrogenation and fuel cell reactions, where the nickel coating acts as an active catalytic site. In sensors, they enhance sensitivity and selectivity for detecting gases and biomolecules.

Their mechanical strength and thermal conductivity make them suitable for reinforcing materials in aerospace and automotive industries, improving durability and heat dissipation.

In biomedical applications, Ni-coated multi-walled carbon nanotubes are studied for drug delivery and as carriers for chemicals in the body, owing to their high surface area and ease of functionalization for targeted uses. They are also researched for medical sensors responsive to chemical and biological changes.

In energy sectors beyond storage, they are used in fuel cells and solar panels to enhance energy conversion efficiency. In environmental applications, they aid in water and air filtration by adsorbing toxins and heavy metals, playing a key role in pollution management and environmental protection.