Enhanced Li+ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder
molybdenum sulfide, silicon, anode material, lithium batteries, spray pyrolysis
A few-layered MoS2–C composite material is studied as a supporting material for silicon nanopowder. Microspheres of the few-layered MoS2–C composite embedded with 30 wt.% Si nanopowder are prepared by one-pot spray pyrolysis. The Si nanopowder particles with high capacity are completely surrounded by the few-layered MoS2–C composite matrix. The discharge capacities of the MoS2–C composite microspheres with and without 30 wt.% Si nanopowder after 100 cycles are 1,020 and 718 mAh·g–1 at a current density of 1,000 mA·g–1, respectively. The spherical morphology of the MoS2–C composite microspheres embedded with Si nanopowder is preserved even after 100 cycles because of their high structural stability during cycling. The MoS2–C composite layer prevents the formation of unstable solid–electrolyte interface (SEI) layers on the Si nanopowder. Furthermore, as the MoS2–C composite matrix exhibits high capacity and excellent cycling performance, these characteristics are also reflected in the MoS2–C composite microspheres embedded with 30 wt.% Si nanopowder.
Tsinghua University Press
Seung Ho Choi,Yun Chan Kang, Enhanced Li+ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder. NanoRes.2015, 8(8): 2492–2502