A Mg²⁺-Regulated Hydrated Vanadium Oxide Positive Electrode for Aqueous Mg-Ion Batteries.

ABSTRACT: Aqueous Mg-ion batteries (AMIBs) have emerged as promising candidates for grid-level energy storage systems, thanks to their exceptional safety characteristics, cost-effectiveness, and abundant Mg resources. However, AMIBs confront great challenges, such as the shortage of high-performance electrodes and the sluggish Mg²⁺ diffusion in the electrodes. In this work, a Mg²⁺-regulated bilayered vanadium oxide (MgVOnH) positive electrode, holding a large interplanar spacing of ∼13.4 Å, was investigated in 0.8 m Mg(TFSI)₂-85% poly(ethylene glycol) (PEG)-15% H₂O and 0.8 m Mg(TFSI)₂-65% PEG-20% dimethyl sulfoxide (DMSO)-15% H₂O (20% DMSO-containing) electrolytes. MgVOnH delivers a first discharge capacity of 268 mAh g^-1 a

SUBMITTER: Fu Q 

PROVIDER: S-EPMC12862750 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature