Epitaxial growth of an atom-thin layer on a LiNi_0.5Mn_1.5O₄ cathode for stable Li-ion battery cycling.

ABSTRACT: Transition metal dissolution in cathode active material for Li-based batteries is a critical aspect that limits the cycle life of these devices. Although several approaches have been proposed to tackle this issue, this detrimental process is not yet overcome. Here, benefitting from the knowledge developed in the semiconductor research field, we apply an epitaxial method to construct an atomic wetting layer of LaTMO₃ (TM = Ni, Mn) on a LiNi_0.5Mn_1.5O₄ cathode material. Experimental measurements and theoretical analyses confirm a Stranski-Krastanov growth, where the strained wetting layer forms under thermodynamic equilibrium, and it is self-limited to monoatomic thickness due to the competition between the surface energy and the elastic energy. Bei

SUBMITTER: Zhu X 

PROVIDER: S-EPMC8943144 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature