A3V2(PO4)3 (AÂ =Â Na or Li) probed by in situ X-ray absorption spectroscopy

► In situ V XANES study in Li3V2(PO4)3 and Na3V2(PO4)3. ► In situ V EXAFS study in Li3V2(PO4)3 and Na3V2(PO4)3. ► Local environment of V atoms in NASICON structure during alkali metal deinsertion/insertion.