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

Abstract

Zn²⁺-doped barium hexaferrite (BaFe₁₂O₁₉) nanoplates with ca. 0.4–1.5 μm 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.