Journal
ACS NANO
Volume 6, Issue 6, Pages 4713-4721Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn2045714
Keywords
soft-template; 2D nanostructures; metal sulfides; iron; lithium ion battery
Categories
Funding
- AcRF Tier 1 of MOE (Singapore) [RG 31/08]
- Singapore Ministry of Education [M0E2010-12-1-017]
- A*STAR SERC [1021700144]
- Singapore [MPA 23/04.15.03 RDP 009/10/102, MPA 23/04.15.03 RDP 020/10/113]
- [NRF2009EWT-CERP001-026]
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We report a facile approach to prepare carbon-coated troilite FeS (C@FeS) nanosheets via surfactant-assisted solution-based synthesis. 1-Dodecanethiol is used as both the sulfur source and the surfactant, which may form different-shaped micelles to direct the growth of nanostructures. Under appropriate growth conditions, the iron and sulfur atoms react to form thin layers of FeS while the hydrocarbon tails of 1-dodecanethiol separate the thin FeS layers, which turn to carbon after annealing in Ar. Such an approach can be extended to grow C@FeS nanospheres and nanoplates by modifying the synthesis parameters. The C@FeS nanosheets display excellent Li storage properties with high specific capacities and stable charge/discharge cyclability, especially at fast charge/discharge rates.
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