handle full cells that starts with a discharge step

[jepegit]

We typically define the coulombic efficiency as charge/discharge. One exception is half-cells studying an anode material (where coulombic efficiency makes more sense if it is defined as discharge/charge). Therefore, cellpy's cycle_mode parameter was implemented to control how coulombic efficiency is calculated. It is also used (at least for default settings) in defining how charge and discharge curves are extracted and visualized.

A common pitfall is when testing commercial cells, where one might start with a discharge (cycle 1) and then continue with charge-discharge cycles (cycles 2, 3, 4, ...). It is likely that some files end up with an "erroneous" cycle counter (could be that the first cycle is discharge-charge-discharge, or that all cycles end up as discharge-charge).

Is there a method in cellpy to handle these cases? If not, could it be implemented (e.g. either as another alternative for the cycle_mode parameter, or some post-processing steps like `update_cycle_counter(...))?

[jepegit]

Most probable solutions: Solution 1, allow for more cycle modes and incorporate into cellpycore how to handle them. Solution 2, allow for more keyword arguments to celllpycore cycle summary creator for more granular control of how cycle summaries are created.

This issue is linked to work that has to be done in cellpycore