Unlocking the passivation nature of the cathode-air interfacial reactions in lithium ion batteries.

ABSTRACT: It is classically well perceived that cathode-air interfacial reactions, often instantaneous and thermodynamic non-equilibrium, will lead to the formation of interfacial layers, which subsequently, often vitally, control the behaviour and performance of batteries. However, understanding of the nature of cathode-air interfacial reactions remain elusive. Here, using atomic-resolution, time-resolved in-situ environmental transmission electron microscopy and atomistic simulation, we reveal that the cathode-water interfacial reactions can lead to the surface passivation, where the resultant conformal LiOH layers present a critical thickness beyond which the otherwise sustained interfacial reactions are arrested. We rationalize that the passivation behavior is dictated by the Li⁺-wate

SUBMITTER: Zou L 

PROVIDER: S-EPMC7316795 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature