Spontaneous reaction between an uncharged lithium iron silicate cathode and a LiPF6-based electrolyte.

Chemical communications (Cambridge, England)

PubMedID: 26511008

Arthur Z, Chiu HC, Lu X, Chen N, Emond V, Zaghib K, Jiang DT, Demopoulos GP. Spontaneous reaction between an uncharged lithium iron silicate cathode and a LiPF6-based electrolyte. Chem Commun (Camb). 2015;.
The reaction between an uncharged Li2FeSiO4 (LFS) cathode and a LiPF6-EC/DMC electrolyte is revealed by in situ XANES in coin cells. This study shows clear evidence of delithiation and iron oxidation in LFS prior to cycling. Subsequent cycling appears to partially restore the original lithiation level, an observation that needs to be taken into consideration in future LFS development work.