LAUSR

MoO2 is a promising anode material for lithium-ion batteries, however, the lithiation of bulk MoO2 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 MoO2 embedded in nitrogen-doped carbon (MoO2/NC) is synthesized through the in situ thermolysis of an organic molybdenum complex MoO2(acac)(phen) (acac = acetylacetone, phen = 1,10-Phenanthroline). Owing to the fact that [MoO2]2+ can be strongly chelated by phen, the molybdenum source in the MoO2(acac)(phen) precursor is highly dispersed, leading to the formation of ultra-small MoO2 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 MoO2/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.