Journal Article Biological Products Macromolecular Substances Research Support, Non-U.S. Gov't Review ampere‐level CO2 electroreduction atom‐scale cascade catalysis biomaterials biomimetics grid‐like multilocular spheres macromolecular assembly multi‐active site collaboration redox electrolyte self-assembly single atom alloys supercapacitors triazine‐based porous organic polymers ultra‐high capacitance