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

摘要

AlNbO_4,as lithium-ion batteries(LIBs) anode,has a high theoretical capacity of 291.5 m Ah g^(-1).Here,AlNbO_4 anode materials were synthesized through a simple solid-state method.The structure,morphology and electrochemical performances of AlNbO_4 anode were systematically investigated.The results show that AlNbO_4 is monoclinic with C2/m space group.The scanning electron microscopy(SEM) and transmission electron microscopy(TEM) characterizations reveal the AlNbO_4 particles with the size of 100 nm^(–2) lm.As a lithium-ion batteries anode,AlNbO_4 delivers a high reversible capacity and good rate capability.The discharge capacity is as high as 151.0 m Ah g^(-1)after 50 charge and discharge cycles at 0.1 C corresponding to capacity retention of 90.7 %.When the current density increases to 5.0C,AlNbO_4 anode displays reversible discharge capacity of 73.6 m Ah g^(-1)at the50 th cycle.