Stabilization of Multicationic Redox Chemistry in Polyanionic Cathode by Increasing Entropy.

ABSTRACT: Polyanionic compounds have large compositional flexibility, which creates a growing interest in exploring the property limits of electrode materials of rechargeable batteries. The realization of multisodium storage in the polyanionic electrodes can significantly improve capacity of the materials, but it often causes irreversible capacity loss and crystal phase evolution, especially under high-voltage operation, which remain important challenges for their application. Herein, it is shown that the multisodium storage in the polyanionic cathode can be enhanced and stabilized by increasing the entropy of the polyanionic host structure. The obtained polyanionic Na_3.4 Fe_0.4 Mn_0.4 V_0.4 Cr_0.4 Ti_0.4 (PO₄ )₃ cath

SUBMITTER: Li H 

PROVIDER: S-EPMC9443449 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature