Impact of Mg and Ti doping in O3 type NaNi1/2Mn1/2O2 on reversibility and phase transition during electrochemical Na intercalation

O3 type NaNi_1/2Mn_1/2O₂ materials with Mg and Ti co-substitution demonstrate better capacity capability with an initial discharge capacity of 200 mA h g⁻¹ in non-aqueous Na cells without any capacity loss due to substitution.