An Exploratory Study of MoS2 as Anode Material for Potassium Batteries

Potassium-based batteries represent one of the emerging classes of post-lithium electrochemical energy storage systems in the international scene, due to both the abundance of raw materials and achievable cell potentials not far from those of lithium batteries. In this context, it is important to define electrodes and electrolytes that give reproducible performance and that can be used by different research groups as an internal standard when developing new materials. We propose molybdenum disulfide (MoS2) as a valid anode choice, being a commercial and easily processable material, the 2D layered structure of which is promising for large potassium ions reversible storage. It has been proven to work for hundreds of cycles, keeping a constant specific capacity around 100 mAh g(-1) while also preserving its electrochemical interphase and morphology.

Automated summary

Potassium-based batteries are a promising type of energy storage system with abundant raw materials and comparable cell potentials to lithium batteries. Molybdenum disulfide has been proposed as a reliable anode material, capable of reversible storage of large potassium ions while maintaining constant specific capacity and electrochemical performance over multiple cycles.