Electrophoretic Deposition of Binder‐Free MOF‐Derived Carbon Films for High‐Performance Microsupercapacitors

Recently, miniaturized power supplies have become essential components of micro‐electromechanical systems (MEMS) and portable microdevices due to their high‐power density, moderate specific energy, and superior long‐term cyclability. In this study, microsupercapacitors with ZIF‐8‐derived carbons as active materials were successfully fabricate by electrophoretic deposition method. The carbon materials on microsupercapacitors, which are directly deposited or obtained by pyrolyzing predeposited ZIF‐8 particles, play a crucial role in achieving outstanding electrochemical performances. The microsupercapacitor of 16 interdigital finger electrodes, prepared by electrophoretic deposition of ZIF‐8 particles and subsequent pyrolysis, shows maximum specific power 687.6 mW cm−3, specific energy 2.87 mWh cm−3, and 97.8 % capacitance retention rate after 10 000 cycles. The simple and facile process of electrophoretic deposition and subsequent pyrolysis of ZIF‐8 particles generates a film of densely populated microporous carbon particles on microsupercapacitor, leading to superior capacitive performances. Microsupercapacitors (MSCs) with carbon as active materials have been fabricated by way of a simple and facile electrophoresis. The carbon materials are derived from the carbonization of ZIF‐8 powders. The electrophoresis method can be easily controlled and allows to obtain deposition layers with good quality. These prepared carbon materials play a crucial role in achieving outstanding electrochemical performances of MSCs.