|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
|Nanoscale Effects on Intercalation-induced Phase Transitions in 2D Materials
|Mengjing Wang, Joshua V Pondick, Shiyu Xu, Judy J Cha
|On-Site Speaker (Planned)
Phase transitions in transition metal dichalcogenides (TMDCs) by lithium intercalation have enabled access to phases with novel properties attractive for energy storage, functional devices, and catalysis. Despite the extensive intercalation studies in MoS2, the effects of lithium intercalation in other 2D group VI TMDCs and heterostructures, as well as nanoscale effects on the thermodynamics of the phase transitions, are rarely reported. Moreover, nucleation pathways of the phase transitions remain underexplored experimentally, prohibiting effective engineering control of these phase transitions.
We developed in situ multi-modal probes to monitor the real-time structure-property relationships of 2D TMDCs during intercalation. In this talk, I will highlight several examples that showcase the nanoscale effects and novel phases that emerge in lithium intercalated TMDCs, such as a semiconducting phase in lithiated WTe2, heterogeneous interface effects to delay the phase transition of MoS2 in MoS2/graphene heterostructures, and the thermodynamics of phase transitions in MoTe2.
|Phase Transformations, Characterization,