Abstract
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. [Figure not available: see fulltext.]
Original language | English |
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Pages (from-to) | 2492-2502 |
Number of pages | 11 |
Journal | Nano Research |
Volume | 8 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2015 Aug 17 |
Keywords
- anode material
- lithium batteries
- molybdenum sulfide
- silicon
- spray pyrolysis
ASJC Scopus subject areas
- Materials Science(all)
- Electrical and Electronic Engineering