F-doped NiCo2O4@CoMoO4 as an advanced electrode for aqueous Zn-ion batteries.

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Heterostructure engineering and element doping is a trustworthy route to attain outstanding aqueous Zn-ion battery electrode materials. Herein, we develop a new type of F-doped NiCo2O4@CoMoO4 hierarchical nanostructure with abundant oxygen vacancies for aqueous Zn-ion batteries. The NiCo2O4@F-CoMoO4 electrodes exhibit an excellent specific capacity of 402 mA h g-1 at 1 A g-1. The assembled NiCo2O4@F-CoMoO4//Zn battery has an excellent specific capacity of 328 mA h g-1 at 2 A g-1, and a high energy density of 544.6 W h kg-1 at a power density of 0.923 kW kg-1.