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Layered Li(Ni0.5Mn0.5)1-xMxO2 (M=Ti, Al; x=0, 0.02) cathode materials for lithium-ion batteries were synthesized by one step solid-state method using Ni(OH)2, MnCO3, Li2CO3, TiO2 and Al(OH)3 as starting materials. The effect of Ti and Al doping on the structure and electrochemical performance of Li(Ni0.5Mn0.5)1-xMxO2 (M=Ti, Al; x=0, 0.02) has been investigated. LiNi0.5Mn0.5O2, Li(Ni0.5Mn0.5)0.98Ti0.02O2 and Li(Ni0.5Mn0.5)0.98Al0.02O2 delivered 149 mAh·g-1, 160 mAh·g-1, 164 mAh·g-1, respectively, at a current of 20 mA·g-1 between 2.5 V and 4.3 V at room temperature, and remained 86%, 91%, 91% of the initial discharge capacity respectively after 30 cycles. AC impedance studies show that Ti and Al doping in Li(Ni0.5Mn0.5)1-xMxO2 (M=Ti, Al; x=0, 0.02) decreased the resistance of charge transfer Rct of cathode materials.
The cathode materials for lithium-ion batteries were synthesized by one step solid-state method using Ni (OH) 2, MnCO3, NiCO3, Li2CO3, TiO2 and Al (OH) 3 as starting materials. The effect of Ti and Al doping on the structure and electrochemical performance of Li (Ni0.5Mn0.5) 1-xMxO2 (M = Ti, Al; ) LiNi0.5Mn0.5O2, Li (Ni0.5Mn0.5) 0.98Ti0.02O2 and Li (Ni0.5Mn0.5) 0.98Al0.02O2 delivered 149 mAh · g-1, 160 mAh · g-1 , 164 mAh · g-1, respectively, at a current of 20 mA · g-1 between 2.5 V and 4.3 V at room temperature, and remained 86%, 91%, 91% of the initial discharge capacity respectively after 30 cycles. AC impedance studies show that Ti and Al doping in Li (Ni0.5Mn0.5) 1-xMxO2 (M = Ti, Al; x = 0, 0.02) decreased the resistance of charge transfer Rct of cathode materials.