Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 27, Issue 41, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201703390
Keywords
anode materials; chemical vapor deposition; electrochemical performance; FeS@Fe3C@ graphitic carbon networks; sodium-ion batteries
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Funding
- National Natural Science Foundation of China [21473081]
- Natural Science Foundation of Jiangsu Province [BK20160213]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Australian Research Council (ARC) [FT150100109]
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Iron sulfides have been attracting great attention as anode materials for high-performance rechargeable sodium-ion batteries due to their high theoretical capacity and low cost. In practice, however, they deliver unsatisfactory performance because of their intrinsically low conductivity and volume expansion during charge-discharge processes. Here, a facile in situ synthesis of a 3D interconnected FeS@Fe3C@graphitic carbon (FeS@Fe3C@GC) composite via chemical vapor deposition (CVD) followed by a sulfuration strategy is developed. The construction of the double-layered Fe3C/GC shell and the integral 3D GC network benefits from the catalytic effect of iron (or iron oxides) during the CVD process. The unique nanostructure offers fast electron/Na ion transport pathways and exhibits outstanding structural stability, ensuring fast kinetics and long cycle life of the FeS@Fe3C@ GC electrodes for sodium storage. A similar process can be applied for the fabrication of various metal oxide/carbon and metal sulfide/carbon electrode materials for high-performance lithium/sodium-ion batteries.
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