In Situ Synthesis of MoO by Surface Oxidation of MoC (MXene) for Stable Near-Surface Reactions in Aqueous Aluminum-Ion Battery.

Molybdenum trioxide (MoO) is a promising positive electrode material for aqueous aluminum-ion batteries (AAIBs) due to its high theoretical capacity. However, MoO faces several challenges in an aqueous electrolyte, such as easy dissolution of reaction products, volume expansion, and low conductivity, which severely limit its application in aqueous batteries. In this work, we effectively increased the overall conductivity of the electrode by in situ growing MoO on the MoC MXene layer.