Exploring porous electrode materials with designed micro/nano-structures is an effecitve way to realize high-performance supercapacitors (SCs). Metal-organic framework (MOF) is a porous crystalline material with periodic structure formed by coordination...

Two-dimensional (2D) metal-organic frameworks (MOFs) with large surface area, ordered pores and ultrathin thickness have recently emerged as ideal electrode materials for supercapacitors (SCs). However, their straightforward applications are restricted...

Transition metal sulfides (TMSs) are the mostly used electrode materials for supercapacitors (SCs). However, they still suffer from unsatisfactory electrochemical properties. Designing hollow mixed TMS nanostructure with well-defined chemical composition...

Layered double hydroxide (LDH) is widely explored in supercapacitors on account of its high capacity, adjustable composition and easy synthesis process. Unfortunately, solitary LDH still has great limitations as an electrode material due to its shortcomings, such as poor conductivity and easy agglomeration. Herein, nanoflakes assembled NiCo-LDH hollow nanocages derived from a metal-organic framework (MOF) precursor are strung by CuO nanorods formed from etching and oxidation of copper foam (CF), forming hierarchical CuO@NiCo-LDH heterostructures. The as-synthesized CuO@NiCo-LDH/CF shows a large capacitance (5607 mF cm À 2 at 1 mA cm À 2 ), superior rate performance (88.3 % retention at 10 mA cm À 2 ) and impressive cycling durability (93.