Fig. 4: Evaluation of the stability and charge/discharge energy-storage performance of high-entropy sample.

a Energy density and efficiency as a function of a temperature, b frequency, and c cycle number under 60 kV mm−1. d Discharge energy density curves for an overdamped system (R = 51 Ω) and e for an underdamped system (R = 51 Ω). f WD versus t0.9 and g CD versus PD as a function of E. h Comprehensive comparison of the energy-storage characteristics.