Mg Ion Pre-Insertion Boosting Reaction Kinetics and Structural Stability of Ammonium Vanadates for High-Performance Aqueous Zinc-Ion Batteries.

Aqueous zinc-ion batteries (AZIBs) attract much attention owing to their high safety, environmentally friendliness and low cost. However, the unsatisfactory performance of cathode materials is one of the unsolved important factors for their widespread application. Herein, we report NH V O nanorods with Mg ion preinsertion (Mg-NHVO) as a high-performance cathode material for AZIBs.

Homogenization of electric field distribution facilitating the Zn anode reversibility.

The surface morphology of the zinc-metal electrode was modulated using different levels of physical polishing treatment. Modulating the surface scratches homogenized the deposition electric field and reduced the local current density. A reasonable surface treatment could limit the "tip effect" and bring homogeneous plating and stripping of the Zn electrode.

Water-Lubricated Aluminum Vanadate for Enhanced Rechargeable Magnesium Ion Storage.

Magnesium ion batteries (MIBs) have attracted much attention due to their low cost and high safety properties. However, the intense charge repulsion effect and sluggish diffusion dynamics of Mg ions result in unsatisfactory electrochemical performance of conventional cathode materials in MIBs. This work reports water-lubricated aluminum vanadate (HAlVO) as high-performance cathode material for Mg ions storage and investigates the capacity fade mechanism of water-free aluminum vanadate (AlVO).