Unraveling the storage mechanism of Na${}_3$V${}_{2-x}$Ni${}_x$(PO${}_4$)${}_2$F${}_3$/C cathodes for sodium-ion batteries through electrochemical, {\it operando} X-ray diffraction and microscopy studies

Simranjot K. Sapra, Jeng-Kuei Chang, Rajendra S. Dhaka

The storage mechanism and diffusion kinetics of Na${}_3$V${}_{2-x}$Ni${}_x$(PO${}_4$)${}_2$F${}_3$/C ($x=$ 0--0.07) cathodes are investigated through electrochemical impedance spectr…