Na2Li2Ti6O14 nanowires as ultra-long cycling performance anode material for lithium ion storage

Abstract

Na2Li2Ti6O14 nanowires prepared through electrospinning and subsequent calcination method are reported as an anode material for lithium ion storage. During the initial cycle, as-synthesized Na2Li2Ti6O14 nanowires deliver a quite flat charge platform at 1.32 V with the charge capacity of 94.0 mAh g-1 at 100 mA g-1. Specifically, after a long cycle of 2500 times, Na2Li2Ti6O14 nanowires still hold a reversible charge capacity of 88.8 mAh g-1 with a remarkable capacity retention of 94.47%, which also show a high Coulombic efficiency of 99.83%. The favorable electrochemical performance may stem from its unique nanostructures, which not only preserve structural integrity during repeated cycles but also reduce the distance of lithium ion transport.