Book excerpt: Modern lifestyle demands consistent supply of energy for our daily need and comfort. To encounter global demands for energy and to permit for diminution of fossil fuels, there is an urgent need for efficient, sustainable and clean energy sources. Carbonaceous material such as graphene, carbon nanotubes, fullerenes, mesoporous carbon, carbon nanofibres and their composites are extensively studied material. They are playing important role to alternative clean energy sources. This book reviews the roadmap of various form of carbonaceous materials used in several energy devices and provides guideline of future perspective.