A Self-Constructed Mg²⁺/K⁺ Co-Doped Prussian Blue with Superior Cycling Stability Enabled by Enhanced Coulombic Attraction.

ABSTRACT: Prussian blue (PB) is regarded as a promising cathode for sodium-ion batteries because of its sustainable precursor elements (e.g., Mn, Fe), easy preparation, and unique framework structure. However, the unstable structure and inherent crystal H₂O restrain its practical application. For this purpose, a self-constructed trace Mg²⁺/K⁺ co-doped PB prepared via a sea-water-mediated method is proposed to address this problem. The Mg²⁺/K⁺ co-doping in the Na sites of PB is permitted by both thermodynamics and kinetics factors when synthesized in sea water. The results reveal that the introduced Mg²⁺ and K⁺ are immovable in the PB lattices and can form stronger K‒N and Mg‒N Coulombic attraction to relieve phase transitio

SUBMITTER: Xu Z 

PROVIDER: S-EPMC11558122 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature