Effectively Modulating Oxygen Vacancies in Flower-Like δ-MnO₂ Nanostructures for Large Capacity and High-Rate Zinc-Ion Storage.

ABSTRACT: In recent years, manganese-based oxides as an advanced class of cathode materials for zinc-ion batteries (ZIBs) have attracted a great deal of attentions from numerous researchers. However, their slow reaction kinetics, limited active sites and poor electrical conductivity inevitably give rise to the severe performance degradation. To solve these problems, herein, we introduce abundant oxygen vacancies into the flower-like δ-MnO₂ nanostructure and effectively modulate the vacancy defects to reach the optimal level (δ-MnO_2-x-2.0). The smart design intrinsically tunes the electronic structure, guarantees ion chemisorption-desorption equilibrium and increases the electroactive sites, which not only effectively accelerates charge transfer rate during reaction processes, b

SUBMITTER: Wang Y 

PROVIDER: S-EPMC10560176 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature