Synergetic Anion-Cation Redox Ensures a Highly Stable Layered Cathode for Sodium-Ion Batteries.

ABSTRACT: Sodium-ion batteries are commonly regarded as a promising candidate in large-scale energy storage. Layered iron/manganese oxide cathodes receive extensive attentions due to the element abundance and large theoretical capacity. However, these materials usually undergo obvious degradation of electrochemical performance due to the tendency of Mn dissolution and Fe migration during continuous sodium release and uptake. Herein, a strategy of anion-cation synergetic redox is proposed to suppress the structural deterioration originated from overusing the electrochemical activity of transition-metal ions, and decreased lattice strain as well as superior electrochemical performance are realized simultaneously. Results show that the Na_0.8 Li_0.2 Fe_0.2 Mn_0.6

SUBMITTER: Li X 

PROVIDER: S-EPMC9165485 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature