Yolk-shelled MoS/C@Void@C@MoS nanospheres as a stable and high-rate anode in sodium/potassium ion batteries.

We report a yolk-shelled anode material with an MoS/C core, large inner void and C@MoS shell (MoS/C@Void@C@MoS). This design could accelerate Na/K reaction kinetics and endure volume changes. Based on the kinetics analysis and calculations based on density functional theory, this structure could effectively enhance the high-rate sodium/potassium storage capability.