A phenomenological and quantitative view on the degradation of positive electrodes from spent lithium-ion batteries in humid atmosphere.

ABSTRACT: The present study deals with the phenomenological observation of the corrosion of the positive electrode foil of lithium-ion batteries containing LiNi_0.6Co_0.2Mn_0.2O₂ (NMC) as cathode material. Due to the presence of moisture, localized water accumulation is formed on the NMC surface. The water absorbed by the electrolyte reacts with the NMC under Li⁺/H⁺ exchange and the resulting pH increase leads to dissolution of the carrier foil and characteristic salt-like blooms on the NMC surface. With the increase in the relative area occupied by the holes in the aluminum foil per time, a sufficiently suitable parameter was found with which to quantitatively determine the extent of corrosion. The degree of degradation depends on time

SUBMITTER: Langner T 

PROVIDER: S-EPMC10079828 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature