Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities
- Authors
- Choi, Seung Ho; Kang, Yun Chan
- Issue Date
- 11-11월-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- metal sulfide; nanostructure; anode material; sodium batteries; spray pyrolysis
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.7, no.44, pp.24694 - 24702
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 7
- Number
- 44
- Start Page
- 24694
- End Page
- 24702
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/91915
- DOI
- 10.1021/acsami.5b07093
- ISSN
- 1944-8244
- 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.
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