Enhanced electrochemical performance of barium hexaferrite nanoplates by Zn2+ doping serving as anode materials

摘要

Zn2+-doped barium hexaferrite (BaFe12O19) nanoplates with ca. 0.4-1.5 mu m in diameter and a thickness of ca. 50 nm have been successfully fabricated through a facile hydrothermal approach, followed by an annealing process. The as-prepared Zn2+-doped BaFe12O19 nanoplates were first evaluated as anode materials for lithium-ion batteries (LIBs). Electrochemical tests demonstrated that the Zn2+-doped BaFe12O19 nanoplates with 2.7 mol% Zn2+ doping delivered a higher reversible capacity of 665.5 mA h g(-1) than that (441.5 mA h g(-1)) of BaFe12O19 nanoplates after 250 cycles at a current density of 100 mA g(-)1. The superior cycling performance witnessed in Zn2+-doped BaFe12O19 are attributed to the Zn2+ doping, which can efficiently enhance the electronic conductivity of BaFe12O19 as confirmed by the impedance measurements.