1. Degradation mechanisms

Positive battery electrode: electrode which has the potential (noted E ₊ or $E_{\text{pos}}$ ).

Negative battery electrode: electrode which has the potential (noted E _– or $E_{\text{neg}}$ ).

Active material: in a lithium-ion battery, this is the material that reversibly inserts and de-inserts lithium. A positive electrode active material (de)inserts lithium ions in a potential range generally between 2 V and 4.3 V vs Li ^...