Facile synthesis of FeSi4P4 and its Sodium Ion Storage Performance. (1st September 2017) - Liu, Qing
Graphical abstract: FeSi4 P4 can deliver a reversible capacity of 180 mAh g −1 at 100 mA g −1 with a capacity retention of 99% after 100 cycles. The sodium storage in FeSi4 P4 is realized via the unusual insertion/extraction reaction. Highlights: Pure FeSi4 P4 is synthesized via a facile ball milling method. FeSi4 P4 anode shows excellent cycling stability and rate ability for SIBs. Insertion/extraction reaction is revealed for FeSi4 P4 electrode. Abstract: FeSi4 P4 has been synthesized by a facile ball-milling method and evaluated as anode in sodium ion battery for the first time. The FeSi4 P4 electrode can deliver a reversible capacity of 180 mAh g −1 at 100 mA g −1 with a capacity retention of 99% after 100 cycles. Experimental data and DFT calculation reveal that the sodium storage in FeSi4 P4 is realized via the unusual insertion/extraction reaction. Our results demonstrate that transition metal phosphosilicides could be potential anode materials for sodium ion batteries.