I do not believe that the passage of time is the main cause of lithium ion battery degradation. The source that you linked, http://www.sciencedirect.com/science

I do not believe that the passage of time is the main cause of lithium ion battery degradation. The source that you linked, http://www.sciencedirect.com/science/article/pii/S0378775316316998 http://www.sciencedirect.com/science/article/pii/S0378775316..., does not seem to support that idea either. Figure 3 from the paper, "Cause and effect of degradation mechanisms and associated degradation modes," shows time as just one of 8 degradation mechanisms affecting lithium ion batteries. Other figures/tables from the paper do not emphasize time as the primary degradation mechanism, nor does the body text. Nor is there any explicit passage-of-time term in the final diagnostic model that the authors develop.