Polyaniline‐Coated Mesoporous Carbon Nanosheets with Fast Capacitive Energy Storage in Symmetric Supercapacitors (Adv. Sci. 21/2023)

Mesoporous Nanosheets for Symmetric Supercapacitors Efficient energy storage in supercapacitors requires high conductivity and well‐defined porosity. In article number 2301923 by Jungchul Noh, Suk Jekal, and Chang‐Min Yoon, a fast symmetric supercapacitor is demonstrated using mesoporous polyaniline‐coated carbon nanosheets. Mesoporous nanosheets are designed by calcination and etching of assembled nanocrystals to obtain ordered porous channels with high surface area. Controlled polyaniline coating, using the vapor deposition polymerization method, improves the conductivity with the retention of mesopores, facilitating the transport of polymer gel electrolytes. The cover image illustrates that the nanosheets exhibit fast capacitive energy storage in the symmetric supercapacitor owing to their high conductivity and porosity.