Propagation topography of redox phase transformations in heterogeneous layered oxide cathode materials

• DOI: 10.1038/s41467-018-05172-x
• Publication Date: 2018-07-12T15:01:34Z
• Authors: Linqin Mu; Qingxi Yuan; Chixia Tian; Chenxi Wei; Kai Zhang; Jin Liu; Piero Pianetta; Marca M. Doeff; Yijin Liu; Feng Lin
• Keywords: Engineering; Science; Chemical Sciences; Q; Materials Engineering; 540; 530; Physical Chemistry; 01 natural sciences; Article; 0104 chemical sciences

Redox phase transformations are relevant to a number of metrics pertaining the electrochemical performance batteries. These deviate from and more complicated than conventional theory nucleation propagation, owing simultaneous changes cationic anionic valence states as well polycrystalline nature battery materials. Herein, we propose an integrative approach mapping constructing chemical topographies investigate redox transformation in layered oxide cathode materials under thermal abuse conditions. We discover that, addition three-dimensional heterogeneous transformation, there is mesoscale evolution local curvatures state topographies. The relative probability negative positive alternates during layered-to-spinel/rocksalt transformation. implementation our method can potentially provide universal study behaviors beyond.