Advanced Anode Materials Based on Iron Oxides for Lithium-Ion Batteries

Abstract

Three main iron oxides, FeO, Fe2O3, and Fe3O4, have attracted much attention as anode materials for lithium-ion batteries (LIBs) for their high theoretical capacity, low cost, large-scale reserves, and environmental benignity. However, the poor cycling life and rate capability limit their commercial application on a large scale. Glaring strategies have been adopted to improve the performance of lithium storage. In this review, the electrochemical performances of FeO, Fe2O3, and Fe3O4 anode materials could be improved by the decrease in particle size, regulation and control of the nanomicrostructures, the improvement of electrical conductivity, and the design of composites. Their effects on the electrochemical performance of the anode materials are discussed in detail. Furthermore, the development prospect of iron oxide-basedanode material has been prospected.

Construction of heterostructured Fe2O3/Fe7S8 hollow fibers to boost the electrochemical kinetics of lithium storage

“…One approach focuses on constructing rational nanoarchitectures to shorten the electron/ion diffusion paths and accommodate the volume change upon cycling, including nanoparticles, nanofibers, nanowires, nanosheets, nanoboxes, and nanospheres. 9–15 In some cases, carbon-based materials are also involved in this strategy to further enhance the overall electrical conductivity of the active materials. 16–18 Another approach involves the sophisticated design of heterostructures consisting of different active materials to promote the charge transfer at their interface due to the generation of a built-in electric field, which is beneficial to electron/ion diffusion and reaction kinetics, thereby significantly contributing to an improved rate performance.…”