Lithium ion chemical diffusion coefficients in 6LiMn2O4 thin sputtered films (about

2μm) were determined by the depth profiles of 7Li concentration after adopting the

potential step in 7LiClO4/propylene carbonate solution by using secondary-ion

mass spectrometry. Lithium chemical diffusion coefficient via bulk (Dbulk) and

grain boundary diffusion coefficient normalized with width (dDgb) were determined

as 1.23 x 10−15m2/s and 6.55 x 10−20m3/s, respectively.

Determination of Lithium Ion Diffusion in Lithium–Manganese-Oxide-Spinel Thin

Films by Secondary-Ion Mass Spectrometry. T.Okumura, T.Fukutsuka, Y.Uchimoto, N.Sakai, K.Yamaji, H.Yokokawa: Journal of Power Sources, 2009,

189[1], 643-5