Observation of an intermediate state during lithium intercalation of twisted bilayer MoS2
Yecun Wu,Jiangyan Wang,Yanbin Li,Jia-Heng Zhou,Bai Yang Wang,Ankun Yang,Liang Wang,Harold Y. Hwang,Yi Cui +8 more
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TLDR
In this article , the stabilization of the intermediate state across the whole flake of twisted bilayer MoS2 was investigated, and it was shown that the intermediate states are stabilized by lithium-induced symmetry breaking of the H phase MoS 2 without a phase transition.Abstract:
Lithium intercalation of MoS2 is generally believed to introduce a phase transition from H phase (semiconducting) to T phase (metallic). However, during the intercalation process, a spatially sharp boundary is usually formed between the fully intercalated T phase MoS2 and non-intercalated H phase MoS2. The intermediate state, i.e., lightly intercalated H phase MoS2 without a phase transition, is difficult to investigate by optical-microscope-based spectroscopy due to the narrow size. Here, we report the stabilization of the intermediate state across the whole flake of twisted bilayer MoS2. The twisted bilayer system allows the lithium to intercalate from the top surface and enables fast Li-ion diffusion by the reduced interlayer interaction. The E2g Raman mode of the intermediate state shows a peak splitting behavior. Our simulation results indicate that the intermediate state is stabilized by lithium-induced symmetry breaking of the H phase MoS2. Our results provide an insight into the non-uniform intercalation during battery charging and discharging, and also open a new opportunity to modulate the properties of twisted 2D systems with guest species doping in the Moiré structures. read more
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Electrostatic gating and intercalation in 2D materials
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A comprehensive review of synthesis, structure, properties, and functionalization of MoS2; emphasis on drug delivery, photothermal therapy, and tissue engineering applications
Mehrab Pourmadadi,Alireza Tajiki,Seyede Mahtab Hosseini,Amir Samadi,Majid Abdouss,Shirin Daneshnia,Fatemeh Yazdian +6 more
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Activation of MoS2 monolayer electrocatalysts via reduction and phase control in molten sodium for selective hydrogenation of nitrogen to ammonia
TL;DR: In this article , the activation of MoS2 in molten sodium is described, leading to simultaneous formation of a sulfur vacancy-rich heterostructured 1T 2H-MoSx monolayer via reduction and phase transformation.
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TiO2 nanorods based self-supported electrode of 1T/2H MoS2 nanosheets decorated by Ag nano-particles for efficient hydrogen evolution reaction
Chang-yan Lin,Yunping Liu,Yaxing Sun,Zhenyu Wang,Haojie Xu,Mingtao Li,Jian Mei Feng,Bo Hou,Wei-Mon Yan +8 more
TL;DR: In this paper , a silver nanoparticles (Ag NPs)-decorated 1T/2H phase layered MoS2 electrocatalyst grown on titanium dioxide nanorod arrays was prepared through acid-tunable ammonium ion intercalation.
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