Zero-strain Na4Fe7(PO4)6 as a novel cathode material for sodium–ion batteries

Zero-strain Na4Fe7(PO4)6 as a novel cathode material for sodium–ion batteries

We report for the first time a zero-strain cathode, Na4Fe7(PO4)6, for sodium–ion batteries (SIBs). This new iron-based polyanionic cathode delivers a reversible capacity of 66.5 mA h g−1 at 5 mA g−1 with almost 100% capacity retention over 1000 cycles under 200 mA g−1, and the outstanding performanc...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2019, Vol.55 (61), p.9043-9046
Hauptverfasser: Pu, Xiangjun, Chao, Rong, Tang, Shenglong, Wang, Huiming, Cao, Shunan, Ding, Yan, Cao, Yuliang, Chen, Zhongxue
Format: Artikel
Sprache:eng
Schlagworte:
Batteries
Cathodes
Differential thermal analysis
Electrode materials
Phase transitions
Sodium-ion batteries
X ray photoelectron spectroscopy
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Zusammenfassung:We report for the first time a zero-strain cathode, Na4Fe7(PO4)6, for sodium–ion batteries (SIBs). This new iron-based polyanionic cathode delivers a reversible capacity of 66.5 mA h g−1 at 5 mA g−1 with almost 100% capacity retention over 1000 cycles under 200 mA g−1, and the outstanding performance benefits from single-phase-transition processes with a tiny volume change of only ∼0.24%.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc04136b