Electrochemical Storage Behavior of a High-Capacity Mg-Doped P2-Type Na_2/3Fe_1-yMn_yO₂ Cathode Material Synthesized by a Sol-Gel Method.

ABSTRACT: Grid-scale energy storage applications can benefit from rechargeable sodium-ion batteries. As a potential material for making non-cobalt, nickel-free, cost-effective cathodes, earth-abundant Na_2/3Fe_1/2Mn_1/2O₂ is of particular interest. However, Mn³⁺ ions are particularly susceptible to the Jahn-Teller effect, which can lead to an unstable structure and continuous capacity degradation. Modifying the crystal structure by aliovalent doping is considered an effective strategy to alleviate the Jahn-Teller effect. Using a sol-gel synthesis route followed by heat treatment, we succeeded in preparing an Mg-doped Na_2/3Fe_1-yMn_yO₂ cathode. Its electrochemical properties and charge compensation mechanism

SUBMITTER: Islam M 

PROVIDER: S-EPMC10815866 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature