Polypyrrole encapsulation on flower-like porous NiO for advanced high-performance supercapacitors

Polypyrrole (PPy) encapsulated 3D flower-like NiO was prepared to investigate the role of PPy coating for high-performance electrodes. NiO@PPy showed a better electrochemical performance than pure NiO, and a trade-off effect between electrical conductivity and ion diffusion resistance was observed with different PPy coating thickness.