Abstract
Mixed metal sulfide composite microspheres with a yolk-shell structure for sodium-ion batteries are studied. Tin-molybdenum oxide yolk-shell microspheres prepared by a one-pot spray pyrolysis process transform into yolk-shell SnS-MoS2 composite microspheres. The discharge capacities of the yolk-shell and dense-structured SnS-MoS2 composite microspheres for the 100th cycle are 396 and 207 mA h g-1, and their capacity retentions measured from the second cycle are 89 and 47%, respectively. The yolk-shell SnS-MoS2 composite microspheres with high structural stability during repeated sodium insertion and desertion processes have low charge-transfer resistance even after long-term cycling. The synergetic effect of the yolk-shell structure and uniform mixing of the SnS and MoS2 nanocrystals result in the excellent sodium-ion storage properties of the yolk-shell SnS-MoS2 composite microspheres by improving their structural stability during cycling.
Original language | English |
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Pages (from-to) | 24694-24702 |
Number of pages | 9 |
Journal | ACS Applied Materials and Interfaces |
Volume | 7 |
Issue number | 44 |
DOIs | |
Publication status | Published - 2015 Nov 11 |
Keywords
- anode material
- metal sulfide
- nanostructure
- sodium batteries
- spray pyrolysis
ASJC Scopus subject areas
- General Materials Science