Analysis of the cause of the falling off of the active material after the coin cell battery cycle charge and discharge test

The battery tester for coin cell battery after the cycle charge and discharge test, the active material falls off the Aluminum Foil and sticks to the diaphragm, what is the reason for this?

Generally speaking, from the following points:

First: It may be related to the process, and the drying temperature and time are not enough.

Second: the bonding strength between the coating and the current collector is related, check whether the amount of bonding agent is too small.

Does the adhesive fail.

Third: confirm the density after rolling after coating，adjust the pressure of the battery roller press

Fourth: The tension caused by the expansion and contraction of the macroscopic volume caused by the lattice stretching vibration during the charging and discharging process exceeds the elasticity of the binder; for high-nickel materials, it may also be due to the impact of gas production.