Fig. 3: Electrochemical performance and energy densities of LFMP and LFP.
From: Sustainable upcycling of mixed spent cathodes to a high-voltage polyanionic cathode material
a Initial two charge and discharge curves of R-F5M5, R-F8M2, and C-LFP. b Comparison of the discharge capacities, middle voltages, and energy densities. c Middle voltage retention at 1 C rate after 200 cycles. d Cycling performance and e rate capabilities of R-F5M5, R-F8M2, and C-LFMP. f, g dQ/dV curves of R-F5M5 and C-LFMP cathodes. h Capacity retentions of R-F5M5 at 1, 2, and 5 C. i Charge and discharge curves and operando XRD contour map of R-F5M5 in the initial cycle. j Schematic of crystal structure changes during charge and discharge. LiFe0.5Mn0.5PO4, Li1–xFe0.5Mn0.5PO4 (1 ≥ x ≥ 0) and Fe0.5Mn0.5PO4 are denoted as LFMP, L1-xFMP and FMP, respectively. k Comparison of the performance of R-LFMP, R-LFCP, and commercial cathodes.
