Boosting the electrochemical performance of the cathode material for beyond lithium-ion batteries.

Grant Funding 2020-2022
Ministry of Education and Science of the Republic of Kazakhstan

The purpose of this research is to comprehensively study and analyze the promising cathode materials as Na−Mn−Me−O (Fe, Zr) with layered type structures and different polymorphs in terms of stability and electrochemical performance for rechargeable sodium-ion batteries.

The primary approach is to find an appropriate composite structure and build a new design of cathode materials for SIBs. The second approach is to use transition metal heteroatoms as a doping material. This approach improves the phase transitions during the charging-discharging cycles and augments the essential transfer features. The second approach can be possible using metal ions such as magnesium, titanium, iron, aluminum, zirconium, and some electrochemically inactive transition metals. The main aspect of metal ion action is to inhibit the collapse of layer structure by accommodating more Na+ and improving capacity retention with a little capacity loss

NaxFeO2 P2-type is considered a possible expectant as electrode materials with high capacitance and energy. However, Fe4+ cannot be stabilized in the oxide-ionic structure under ambient conditions. Thus, the manganese ions were partially replaced by iron to stabilize the P2-type phase.