Fig. 5: XPS analysis.
From: High-performance Na3V2(PO4)3/C cathode for efficient low-temperature lithium-ion batteries

a Survey XPS spectra and deconvoluted XPS spectra of (b) C 1 s, (c) O 1 s, (d) P 2p, (e) F 1 s and (f) V 2p of fresh and cycled NVP/C.