Easy hydrothermal synthesis of multi-shelled La_2O_3 hollow spheres for lithium-ion batteries

摘要

AbstractHerein, uniform triple-shelled La2O3hollow spheres were synthesized for the first time by a facile one-pot hydrothermal method capable of controlling the number of internal thin-shells, which can be achieved by controlling the calcination temperature. Used as anodes for Li-ion batteries, the triple-shelled La2O3hollow spheres show excellent cycling performance, good rate capacity, and high specific capacity. A superior capacity, up to 108 mAh g−1with minimal irreversible capacity after 100 cycles is achieved at a current rate of 100 mA g−1. After the high-rate charge–discharge cycling, a specific discharge capacity as high as 190.1 mAh g−1can be restored when the current density is reduced to 50 mA g−1(theoretical specific capacity = 246.8 mAh g−1).