The average greyscale analysis, whilst useful, does not provide us with a particle-byparticle view of the whole electrode, and thus we now define a damage factor for each particle to accurately assess the particles' condition, and how it's condition changes with electrochemical state. Whilst looking at individual particles, a damage factor is required as the mean grey level is highly affected by particle size; damage factor looks to remove this size dependency. For specifics on damage factor calculation see glossary in SI.