Fig. 4: Application of j0(Facet) toward designing high-rate NMC811 positive electrode via minimizing the presence of solid-liquid interface created by the kinetically slowest (003) facet.
From: Quantifying the electrochemical kinetics of battery positive-electrode crystal facets
a Schematic diagrams of two kinds of electrodes using agglomerates with isotropic structure and anisotropic core-shell structure. b, c SEM images of NMC811 particles with isotropic structure and anisotropic core-shell structure. d, e SEM and HRTEM images of isotropic NMC811 agglomerates and anisotropic core-shell NMC811 agglomerates. f Long-term cycle performance of anisotropic core-shell NMC811 electrode and isotropic NMC811 electrode (slow charge at 0.5 C/fast discharge at 10 C and 1 C = 180 mA·g−1). g Rate performance of the cell assembled by NMC811 agglomerates with isotropic structure and anisotropic core-shell structure. h The charging and discharging curves of the cell assembled by NMC811 agglomerates with isotropic structure and anisotropic core-shell structure at 10 C. i Comparison with the rate-performance and capacity retention of other interface-modified NMC811 reported in the literature (the source of the literature data shown in this figure can be found in Supplementary Table 4).
