High-Entropy Layered Oxide Cathode Enabling High-Rate for Solid-State Sodium-Ion Batteries.

ABSTRACT: Na-ion O3-type layered oxides are prospective cathodes for Na-ion batteries due to high energy density and low-cost. Nevertheless, such cathodes usually suffer from phase transitions, sluggish kinetics and air instability, making it difficult to achieve high performance solid-state sodium-ion batteries. Herein, the high-entropy design and Li doping strategy alleviate lattice stress and enhance ionic conductivity, achieving high-rate performance, air stability and electrochemically thermal stability for Na_0.95Li_0.06Ni_0.25Cu_0.05Fe_0.15Mn_0.49O₂. This cathode delivers a high reversible capacity (141 mAh g^-1 at 0.2C), excellent rate capability (111 mAh g^-1 at 8C, 85 mAh g^-1 even at 20C),

SUBMITTER: Cai T 

PROVIDER: S-EPMC10635981 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature