Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 4, Pages 1429-1433Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201405512
Keywords
energy conversion; energy storage materials; nanostructures; spray drying; synthesis design
Categories
Funding
- National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A2A2A02046367]
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Yolk-shell-structured Zn-Fe-S multicomponent sulfide materials with a 1:2 Zn/Fe molar ratio were prepared applying a sulfidation process to ZnFe2O4 yolk-shell powders. The Zn-Fe-S powders had mixed sphalerite (Zn,Fe)S and hexagonal FeS crystal structures. The discharge capacities of the Zn-Fe-S powders sulfidated at 350 degrees C at a constant current density of 500 mA g(-1) for the first, second, and fiftieth cycles were 1098, 912, and 913 mA h g(-1), respectively. The powders exhibited a high discharge capacity of 602 mA h g(-1) even at the high current density of 10 A g(-1). The synergistic effect of yolk-shell structure and multicomponent composition improved the electrochemical properties of Zn-Fe-S powders.
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