Carbon-coated BiOBr composite prepared by molten salt method and mechanical ball milling as anode material for lithium-ion batteries

Abstract

In this paper, carbon-coated BiOBr composite (BiOBr@C) is obtained through simple molten salt method using Bi(NO3)3∙5H2O and KBr in fused LiNO3-KNO3 eutectic salt combined with ball milling. The as-prepared samples were characterized by X-ray diffraction, Scanning electron microscope and Transmission electron microscope. Compared with pure BiOBr, electrochemical tests showed that the BiOBr@C composite electrode has been significantly enhanced by composite with ketjen black. It delivers a reversible capacity of 422 mAh g−1 after 100 cycles at 100 mA g−1. Similarly, the BiOBr@C composite also exhibits excellent rate performance with the reversible capacity of 380 mAh g−1 at a current density of 400 mA g−1.