|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Reversible Aluminum Intercalation in Transition Metal Sulfides
||Linxiao Geng, Juchen Guo
|On-Site Speaker (Planned)
One of the main challenges hindering the development of rechargeable aluminum batteries is the lacking of understanding of cathode materials. In this study, we investigated a number of transition metal sulfides as the intercalation-type cathode materials for rechargeable Al batteries. We demonstrate Chevrel phase molybdenum sulfide (Mo6S8) as the intercalation-type cathode material with aluminum chloride/1-butyl-3-methyimidazolium chloride ionic liquid electrolyte. The X-ray diffraction analysis further indicates the crystal structure change of Mo6S8 after Al intercalation. In addition, we confirmed the aluminum intercalation in the layered TiS2 and cubic Ti2S4 crystal structure using combined electrochemical analysis and ex-situ XRD. Furthermore, our study suggests the low Al ion diffusivity in the titanium sulfide framework induced by strong coulombic intercalation is the key obstacle for fast discharge-charge. This finding could provide guideline for design and synthesis of future titanium sulfides electrode materials.