MgFePO4F as a feasible cathode material for magnesium batteries

Abstract

A stoichiometric MgFePO₄F (MFPF) is synthesised by using a solid-state carbothermal method. Its monoclinic framework, possessing an entire cationic mixing of Mg²⁺ and Fe²⁺, is validated via both crystal structure analysis and simulation. Interestingly, MFPF exhibits a relatively high potential (∼2.6 V vs. Mg/Mg²⁺) and good cyclic stability with an encouraging capacity (∼53 mA h g⁻¹), bringing MFPF to the fore as a promising cathode material for magnesium batteries.