Carbon Nanoarrays Embedded with Metal Compounds for High‐Performance Flexible Supercapacitors

Abstract Metal‐organic frameworks (MOFs)‐derived nanoarrays have been widely used as electrode materials in energy storage applications with the unique morphology and large specific surface area. Herein, we report a series of N‐doped carbon arrays embedded with different metal compounds (noted as NC@Co 3 O 4 , NC@CoSe 2 and NC@CoS 2 ), which have been derived from a Co‐based MOF through simple fabrication processes. The resulted structures have high surface‐to‐volume ratio and short charge‐transfer paths in electrochemical reactions, which greatly benefit the energy storage performance. An asymmetric supercapacitor of NC@CoS 2 //Co‐NC@Fe 2 O 3 is also demonstrated, which has a power density up to 23.5 kW/kg and illustrates good cycling stability after long‐time rapid charging and discharging. This work demonstrates a promising way to develop MOF‐derived nanoarrays for flexible energy storage devices.