Hi,
I am running a degradation sim with the O’Kane model with the following models:
sei_growth=“solvent-diffusion limited”,
lithium_plating=“partially reversible”,
loss_active_material=stress-driven",
porosity_change=SEI porosity change,
In the summary file, the ‘Formation capacity loss [A.h]’ increases on a cyclic basis and is much larger than ‘Loss of capacity to negative SEI [A.h]’. Can someone please explain the following:
Why does the formation capacity increase?
Why is it much larger than Loss of capacity to negative SEI?
I assume its just definitions which carry different meanings . Clarification of this would be greatly appreciated.
These are the possible LLI columns but they dont add up to zero (nothing on the positive side):
CYCL = ‘Cyclable lithium capacity [A.h]’
PLATE = ‘Loss of capacity to negative lithium plating [A.h]’
NE_SEI = ‘Loss of capacity to negative SEI [A.h]’
CRACK_SEI = ‘Loss of capacity to negative SEI on cracks [A.h]’
FORM = ‘Formation capacity loss [A.h]’
TIA