Hollow-sphere iron oxides exhibiting enhanced cycling performance as lithium-ion battery anodes

Abstract

Hollow-sphere Fe₂O₃ is synthesized as a lithium-ion battery anode. Current densities for the initial material activation are important, related to electrode stability during cycling. The as-prepared anodes are able to retain 92% capacity after 1000 cycles at 1 A g⁻¹. The full-cells assembled with Fe₂O₃ anodes and LiFePO₄ cathodes exhibit good electrochemical properties.