Highly Ambient-Stable 1T-MoS₂ and 1T-WS₂ by Hydrothermal Synthesis under High Magnetic Fields

The phase-controlled synthesis of metallic and ambient-stable 2D MX₂ (M is Mo or W; X is S) with 1T octahedral coordination will endow these materials with superior performance compared with their semiconducting 2H coordination counterparts. We report a clean and facile route to prepare 1T-MoS₂ and 1T-WS₂ through hydrothermal processing under high magnetic fields. We reveal that the as-synthesized 1T-MoS₂ and 1T-WS₂ are ambient-stable for more than 1 year. Electrochemical measurements show that 1T-MoS₂ performs much better than 2H-MoS₂ as the anode for sodium ion batteries. These results can provide a clean and facile method to prepare ambient-stable 1T-phase MX₂.