Pursuing active, low-cost, and stable electrode materials with superior rate capability and long-life cycling performances for lithium-ion batteries remains a big challenge. In this study, a carbon-coated shuttle-like FeO/Fe S heterostructure is synthesized by simply annealing Fe-based metal-organic frameworks (MIL-88(Fe)) as precursors and sublimed sulfur. Carbon-coated FeO/Fe S displays a unique structure with ultrafine FeO/Fe S nanoparticles distributed in the hollow and porous carbon matrix, which offers a large specific surface area and fast charge transfer ability, and alleviates the volume change upon cycling. When evaluated as an anode material for lithium-ion batteries, it exhibits an ultra-high specific capacity of 1200 mA h g at 0.1 A g, and superior high rate capability with a capacity of 345 mA h g at a very high current density of 5.0 A g owing to its high electrical conductivity and enhanced pseudocapacitive contribution from surface effects. The current strategy is promising to synthesize the carbon-coated porous structure from metal-organic frameworks for next-generation energy-storage applications.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417708 | PMC |
| http://dx.doi.org/10.1039/d0na00372g | DOI Listing |
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