Electrochemical performance of aluminum niobium oxide as anode for lithium-ion batteries

AlNbO4,as lithium-ion batteries（LIBs） anode,has a high theoretical capacity of 291.5 m Ah g-1.Here,AlNbO4 anode materials were synthesized through a simple solid-state method.The structure,morphology and electrochemical performances of AlNbO4 anode were systematically investigated.The results show that AlNbO4 is monoclinic with C2/m space group.The scanning electron microscopy（SEM） and transmission electron microscopy（TEM） characterizations reveal the AlNbO4 particles with the size of 100 nm–2 lm.As a lithium-ion batteries anode,AlNbO4 delivers a high reversible capacity and good rate capability.The discharge capacity is as high as 151.0 m Ah g-1after 50 charge and discharge cycles at 0.1 C corresponding to capacity retention of 90.7 %.When the current density increases to 5.0C,AlNbO4 anode displays reversible discharge capacity of 73.6 m Ah g-1at the50 th cycle.