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- W2984294433 abstract "Abstract Sb-based anodes have shown great potential in sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) owing to their high theoretical capacities and applicable voltage platforms, but they usually suffer from severe volume change and sluggish ion diffusion kinetic. Herein, a novel N-doped three-dimension porous carbon network confined nanosized FeSb alloy composite (3D FeSb@NC) with a strong Fe-N-C bond is elaborately designed and fabricated, this unique structure sufficiently relieves the volume change of Sb during cycling, reduces the diffusion length for both ion/electrons, enhances the electronic conductivity, and provides abundant active sites for Na+/K+ storage. Moreover, the strong Fe-N-C bond can strengthen the interface adhesion between carbon matrix and alloy particle for sustaining structure integrity. The 3D FeSb@NC anodes delivers outstanding electrochemical performances in both SIBs and PIBs, in terms of ultralong cycling life (capacity retention of 85% after 750 cycles for SIBs and 80% after 1000 cycles for PIBs) and excellent rate capability (231 mAh g−1 at 5 A g−1 for SIBs and 119.7 mAh g−1 at 2 A g−1 for PIBs). The kinetic analysis of Na+/K+ storage reveal that the extrinsic pseudo-capacitive contribution accounts for the high rate performance. This work provides an effective strategy to develop nanocomposite anode with superior structural stability and durability for SIBs/PIBs." @default.
- W2984294433 created "2019-11-22" @default.
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- W2984294433 date "2020-03-01" @default.
- W2984294433 modified "2023-10-14" @default.
- W2984294433 title "Constructing N-Doped porous carbon confined FeSb alloy nanocomposite with Fe-N-C coordination as a universal anode for advanced Na/K-ion batteries" @default.
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- W2984294433 doi "https://doi.org/10.1016/j.cej.2019.123327" @default.
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