Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities

Seung Ho Choi; Yun Chan Kang

doi:10.1021/acsami.5b07093

Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS₂ Nanocrystals for Improved Na-Ion Storage Capabilities

Seung Ho Choi, Yun Chan Kang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

98 Citations (Scopus)

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
Pages (from-to)	24694-24702
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	44
DOIs	https://doi.org/10.1021/acsami.5b07093
Publication status	Published - 2015 Nov 11

Keywords

anode material
metal sulfide
nanostructure
sodium batteries
spray pyrolysis

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1021/acsami.5b07093

Cite this

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title = "Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities",

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.",

keywords = "anode material, metal sulfide, nanostructure, sodium batteries, spray pyrolysis",

author = "Choi, {Seung Ho} and Kang, {Yun Chan}",

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AU - Choi, Seung Ho

AU - Kang, Yun Chan

PY - 2015/11/11

Y1 - 2015/11/11

N2 - 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.

AB - 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.

KW - anode material

KW - metal sulfide

KW - nanostructure

KW - sodium batteries

KW - spray pyrolysis

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