Delamination

Example

Use in Lemonergy

Separate mechanisms, observations and fitted models.

This is a reference concept. No executable Lemonergy block has been verified for this term.

Connected concepts

Related concepts from the knowledge graph. Connections show context, not cause and effect. Hover or focus a linked term for its definition.

Binder degradation

Loss of the binder’s ability to hold particles to each other and to the foil, from swelling in electrolyte, repeated strain or heat. Particles that lose contact stop storing lithium, and the coating can delaminate from the foil.

Coating

Applying slurry to the moving foil at a controlled wet thickness, usually with a slot die, often on both sides. Coating weight per area must be held within about one percent across the web, because every downstream property depends on it.

Electrode peel test

Pulling an adhesive tape stuck to a coated electrode away at 90° or 180° while recording the force per unit width, in N/m, to measure how firmly the coating holds to the foil and to itself. It checks binder content, drying and calendering, since weak adhesion leads to flaking during winding and to delamination in service.

Loss of active material

The degradation mode in which electrode material becomes unable to store lithium: particles crack and lose electronic contact, structures collapse, or transition metals dissolve. It is tracked separately for each electrode.

Swelling

Growth in a cell’s thickness, reversibly as the electrodes expand on charge and irreversibly as gas and SEI accumulate. Packs allow for it with compression pads, and a sudden swell in service is a warning sign.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. Lithium ion battery degradation: what you need to know

   Physical Chemistry Chemical Physics · 2021

   Topic background · Degradation mechanisms, modes, operational effects and their interactions.