Fig. 4: Determination of reaction mechanism and in-situ Ni substitution.
From: Alkaline-based aqueous sodium-ion batteries for large-scale energy storage
a Schematic for Ni/C coating for mitigating structural instability because of Mn dissolution in NMF cathode. Charge/discharge curves for NMF//NTP cells in (b) Neutral electrolyte (c) Alkaline electrolyte and (d) Alkaline electrolyte with Ni/C coating. e Operando Raman spectra for Ni/C coated NMF cathode cycled in alkaline electrolyte. f STEM-EDS spectra taken from NMF electrodes following cycling in neutral, alkaline electrolyte and alkaline electrolyte with Ni/C coating. g STEM line scan for cycled NMF cathodes with Ni/C coating. Inset shows Ni mapping for NMF.
