Metallic 1T MoS2 nanosheet arrays vertically grown on activated carbon fiber cloth for enhanced Li-ion storage performance

Abstract

We have developed a controllable solvothermal method to grow intrinsically conductive MoS₂ nanosheet arrays in a metastable 1T phase on carbon fiber cloth (CFC) as binder-free, high-activity Li-ion battery (LIB) anodes. By introducing surface hydroxyl groups on the CFC and tuning the DMF content in the mixed solvent, MoS₂ nanosheet arrays were perpendicularly grown to the surface of the carbon fibers with a high coverage. Electrochemical measurements reveal that the 1T phase nanosheet arrays have excellent Li-ion storage performances, including high specific capacity, high rate capability and good cycling stability, outperforming 2H phase arrays. Because of the metallic 1T phase and the highly oriented array architecture, after subtracting the total capacity of CFC, the 1T arrays also deliver a high reversible specific capacity of 1789 mA h g⁻¹ at 0.1 A g⁻¹ and a retained capacity of 853 mA h g⁻¹ after 140 cycles at 1 A g⁻¹.