Quote:
Originally Posted by S Keith
Deterioration accelerates. A linear extrapolation is too optimistic.
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From what I've read it depends on what's causing the deterioration. On page 18 of this pdf, the authors differentiate between mechanical deterioration, which like you said accelerates capacity deterioration at some point, and chemical deterioration, where capacity deterioration tends to decelerate over time/cycles.
https://www.nrel.gov/docs/fy14osti/62813.pdf