Popcorn-derived porous carbon flakes have been successfully fabricated from the biomass
of maize. Utilizing the “puffing effect”, the nubby maize grain turned into materials with an
interconnected honeycomb-like porous structure composed of carbon flakes. The following
chemical activation method enabled the as-prepared products to possess optimized porous
structures for electrochemical energy-storage devices, such as multilayer flake-like
structures, ultrahigh specific surface area (S BET: 3301 m2 g–1), and a high content of …