Layered Na-Ion Cathodes with Outstanding Performance Resulting from the Synergetic Effect of Mixed P- and O-Type Phases.

ABSTRACT: Herein, the synthesis of new quaternary layered Na-based oxides of the type Na _x Mn _y Ni _z Fe_0.1Mg_0.1O₂ (0.67≤ x ≤ 1.0; 0.5≤ y ≤ 0.7; 0.1≤ z ≤ 0.3) is described. The synthesis can be tuned to obtain P2- and O3-type as well as mixed P-/O-type phases as demonstrated by structural, morphological, and electrochemical properties characterization. Although all materials show good electrochemical performance, the simultaneous presence of the P- and O-type phases is found to have a synergetic effect resulting in outstanding performance of the mixed phase material as a sodium-ion cathode. The mixed P3/P2/O3-type material, having an average elemental composition of Na_0.76Mn_0.5<

SUBMITTER: Keller M 

PROVIDER: S-EPMC4845635 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature