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 0.78 Ni 0.31 Mn 0.67 Nb 0.02 O 2 (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…

• NS
  Natural Science Foundation of Shanghai

  Award: 21ZR1424200
• CL
  Canadian Light Source
• UO
  University of Saskatchewan
• NN
  National Natural Science Foundation of China

  Awards: 51774251, 51774253, B2017203313, 22179077, A201802001
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 20511104003
• CI
  Canadian Institutes of Health Research
• NS
  Natural Sciences and Engineering Research Council of Canada