A Review of Electrode for Rechargeable Magnesium Ion Batteries

Rechargeable magnesium ion batteries with their intrinsic advantages, such as high capacity, low reduction potential and low cost, have been a major candidate for next generation batteries beyond lithium ion batteries. Although some researches have been done in this area, it is still at its early stage hindered by sluggish kinetics and development of electrodes. This review is aimed at exhibiting the key advancement of the cathodes and anodes. Currently used cathodes, Chevel phase, V₂O₅, MnO₂ and MoS₂ are detailed introduced. Currently used anodes have also been summarized, in particular, we highlight Mg-ion insertion-type anode materials (e.g., Bi, Sn) of MIB, which provides a new way of thinking. Furthermore, the mechanism for Mg insertion/deinsertion and several methods to improve the electrochemical properties for these electrode materials, mainly including reducing the particle size and changing the morphology, have been showed.