The diffusion process in a host structure was studied at constant current using various electrochemical cells. The effects of grain-size distribution and temperature were investigated and the diffusivity of Li in RuO2 (table 162) indicated an activation energy of 0.52eV.
A Galvanostatic Study of Lithium Intercalation in RuO2. P.Dalard, D.Deroo, D.Foscallo, C.Mouliom: Solid State Ionics, 1985, 15[2], 91-4
Table 162
Diffusivity of Li in RuO2
Temperature (C) | D (cm2/s) |
80 | 2 x 10-11 |
70 | 9 x 10-12 |
60 | 8 x 10-12 |
50 | 4 x 10-12 |
40 | 3 x 10-12 |
25 | 9 x 10-13 |