Hexagonal Molybdenum Trioxide (h-MoO3) as an Electrode Material for Rechargeable Aqueous Aluminum-Ion Batteries

摘要

Aqueous aluminum-ion batteries are at an early development stage and there is a need to discover new electrode materials for the fabrication of high energy density devices. To address this issue, we investigate MoO3 nanowires as a possible electrode material for use in rechargeable Al-ion batteries that can operate in aqueous conditions. We present a hexagonal structure of MoO3 microrods as an Al-ion intercalation host material and show its first-time use as a potential electrode for an aqueous Al-ion battery system. This yields a discharge capacity of approximately 300 mAh g(-1) for 150 cycles and around 90 % retention after 400 cycles at a current density of 3 A g(-1). The utilization of this type of material and aqueous electrolytes guarantees both safety during operation and simple recycling of spent batteries.