A Hierarchically Porous ZIF@LDH Core‐Shell Structure for High‐Performance Supercapacitors

Abstract Designing nanocomposites with good electrochemical properties is one of the challenges in constructing supercapacitors. Adjustable metal‐organic frameworks (MOFs) have potential research value in improving charge storage and transfer due to their multi‐porosity. Moreover, MOFs can serve as a precursor to various derivatives. Herein, a series of core‐shell structures with macro‐microporous ZIF‐67 (M‐ZIF‐67) as the core and layered double hydroxide (LDH) as the shell were synthesized based on polystyrene spheres (PSs) template via a simple ion etching method. As a result, the sample of M‐ZIF‐67@LDH4 shows a specific capacitance of 597.6 F g −1 at 0.5 A g −1 and a high rate retention of 92% at 3 A g −1 .