Niobium-doped layered cathode material for high-power and low-temperature sodium-ion batteries.

ABSTRACT: The application of sodium-based batteries in grid-scale energy storage requires electrode materials that facilitate fast and stable charge storage at various temperatures. However, this goal is not entirely achievable in the case of P2-type layered transition-metal oxides because of the sluggish kinetics and unfavorable electrode|electrolyte interphase formation. To circumvent these issues, we propose a P2-type Na_0.78Ni_0.31Mn_0.67Nb_0.02O₂ (P2-NaMNNb) cathode active material where the niobium doping enables reduction in the electronic band gap and ionic diffusion energy barrier while favoring the Na-ion mobility. Via physicochemical characterizations and theoretical calculations, we demonstrate that the niobium induces atomic scale surfa

SUBMITTER: Shi Q 

PROVIDER: S-EPMC9184510 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature