Energy materials are substances that store, convert, or transmit energy. They play a crucial role in various applications, including batteries, fuel cells, and solar panels. Common examples include lithium for batteries, silicon for solar cells, and hydrogen for fuel cells. These materials are essential for developing efficient energy systems and reducing reliance on fossil fuels. Research in energy materials focuses on improving their performance, durability, and cost-effectiveness. Innovations in this field aim to enhance energy storage capacity and increase the efficiency of energy conversion processes. Advances in nanotechnology and materials science are driving the development of next-generation energy materials.