Surface-Charge-Mediated Formation of H-TiO₂ @Ni(OH)₂ Heterostructures for High-Performance Supercapacitors

An electrochemically favorable Ni(OH)₂ with porously hierarchical structure and ultrathin nanosheets in a core-shell structure H-TiO₂ @Ni(OH)₂ is achieved through modulating the surface chemical activity of TiO₂ by hydrogenation, which creates a defect-rich surface of TiO₂ , thereby facilitating the subsequent nucleation and growth of Ni(OH)₂ . These configuration-tailored H-TiO₂ @Ni(OH)₂ core-shell nanowires exhibit a superior electrochemical performance and good flexibility.