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[Display omitted] A low crystalline 1T-MoS 2 @S-doped carbon (MoS 2 @SC) composite was successfully synthesized via a facile hydrothermal process. The composite is comprised by few-layer 1T-MoS 2 nanosheets covered by an amorphous carbon layer with an expanded interlayer d-spacing of 1.01 nm. This structure is conducive to the fast transport of lithium-ions and volume accommodation during the charge–discharge process when the composite is applied as an anode material for LIBs. Additionally, the high conductivity and layered structure of 1T-MoS 2 also facilitate fast of ion/electron transport, contributing to the improvement of the electrochemical properties. Therefore, this material demonstrated a high rate performance and excellent cycling stability, with the capacities of 847 and 622 mA h g−1 achieved at the current densities of 0.2 A g−1 and 2 A g−1, respectively. Even at a larger current density of 2 A g−1, MoS 2 @SC delivered a high reversible capacity of 659 mA h g−1 with an average capacity loss of 0.006% per cycle after 500 cycles. [ABSTRACT FROM AUTHOR]

[Display omitted] • An organic molybdenum complex is firstly used to synthesize MoO 2 /NC nanocomposite. • The synthetic route is easy, green, and economical with a yeild of nearly 100% • The nanoparticles with ultra-small size facilitates the conversion reaction. • N -doped carbon increase the structural integrity and electrical conductivity. • MoO 2 /NC exhibits an excellent electrochemical performance for Li-ion storage. MoO 2 is a promising anode material for lithium-ion batteries, however, the lithiation of bulk MoO 2 is usually limited to addition-type reaction at room temperature, and the conversion reaction is hindered because of the sluggish kinetics. Herein, a nanocomposite of MoO 2 embedded in nitrogen-doped carbon (MoO 2 /NC) is synthesized through the in situ thermolysis of an organic molybdenum complex MoO 2 (acac)(phen) (acac = acetylacetone, phen = 1,10-Phenanthroline). Owing to the fact that [MoO 2 ]2+ can be strongly chelated by phen, the molybdenum source in the MoO 2 (acac)(phen) precursor is highly dispersed, leading to the formation of ultra-small MoO 2 nanoparticles in the nanocomposite, which can facilitate the conversion reaction. Moreover, the NC matrix can guarantee a high electrical conductivity and effectively accommodate the volume changes triggered by the conversion reaction. Consequently, the MoO 2 /NC nanocomposite exhibits outstanding electrochemical properties, including large reversible capacity of 950 mA h g−1 at 0.1 A g−1, high-rate capability of 605 mA h g−1 at 2 A g−1, and excellent cycling stability over 500 cycles as an anode material for lithium-ion batteries. [ABSTRACT FROM AUTHOR]