Effects of Carbon Content on the Lithium‐Storage Properties of MoSe2‐C Nanocomposites

Abstract

AbstractMoSe2 has the genuine potential as anode material for lithium‐ion batteries, benefiting from its layered structure, large interlayer space and high specific capacity. In this work, we achieve the controllable and in‐situ synthesis of MoSe2‐C nanocomposites and investigating the dimensional effects (grain size, interlayer distance, and slabs of stacking in number) of carbon content on the MoSe2‐C hybrid material. The optimized anode MoSe2‐15.0%C delivers prominent cycling performance (a high reversible capacity of 1165 mAh g−1 after 150 cycles at 0.2 A g−1 and 860 mAh g−1 after 150 cycles at 1 A g−1) and compelling rate behavior (734 mAh g−1 even at a current density of as high as 10 A g−1). The above elucidates that the modest carbon layer not only guarantee the integrity of the electrode by avoiding the structure collapse, but also elevate the electric conductivity to supply quick discharging and charging. The outstanding electrochemical performance is attributed to the synergistic effect between MoSe2 and the carbon. Hence, MoSe2‐C nanocomposites could be deemed as promising anode materials in lithium‐ion batteries.