A method for obtaining hierarchically structured porous carbons, employing 3D printing to control the structure down to the lower µm scale, is presented. To successfully 3D print a polymer precursor and transfer it to a highly stable and structurally conformal carbon material, stereolithography 3D printing and photoinduced copolymerization of pentaerythritol tetraacrylate and divinylbenzene are employed. Mechanically stable structures result and a resolution of ≈15 µm is demonstrated. This approach can be combined with liquid porogen templating to control the amount and size (up to ≈100 nm) of transport pores in the final carbonaceous material. Additional CO2 activation enables high surface area materials (up to 2200 m2 g‐1) that show the 3D printing controlled µm structure and nm sized transport pores. This unique flexibility holds promise for the identification of optimal carbonaceous structures for energy application, catalysis, and adsorption.

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In article number 1901340, Bastian J. M. Etzold and co‐workers employ stereolithography 3D printing to enhance activated carbon to the 3D dimension. Enabling true co‐polymerization and porogen templating during the printing allows carbon structures to be obtained with controlled geometry from the µm to mm scale in combination with porosity down to the nm scale and surface areas of 5 tennis courts per 1 g.

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