Future Perspectives and Emerging Trends in Nanomaterials for Energy Storage

Nanomaterials have revolutionized the field of energy storage by offering significantly improved ionic transport and electronic conductivity compared to traditional battery and supercapacitor materials. Their ability to occupy all intercalation sites within the particle volume results in high specific capacities and rapid ion diffusion. These characteristics enable nanomaterial-based electrodes to handle high currents, presenting a promising solution for both high-energy and high-power energy storage applications. Despite these advantages, the commercial use of nanomaterials in energy storage devices remains limited, with notable exceptions like multiwall carbon nanotube additives and carbon coatings on silicon particles in lithium-ion battery electrodes. Over decades of research and development, a diverse array of nanomaterials has been created, featuring a wide range of chemical compositions and shapes, from oxides, chalcogenides, and carbides to carbon and elements forming alloys with lithium. This extensive library includes various particle morphologies, such as zero-dimensional (0D) nanoparticles and quantum dots; one-dimensional (1D) nanowires, nanotubes, and nanobelts; two-dimensional (2D) nanoflakes and nanosheets; and three-dimensional (3D) porous nanonetworks. These nanoscale building blocks, when combined with lithium and beyond-lithium ions, are paving the way for advanced energy storage solutions, including wearable and structural energy storage technologies that are unattainable with conventional materials.