Fig. 3
From: Reversible flowering of CuO nanoclusters via conversion reaction for dual-ion Li metal batteries
a Resistivity of the as-prepared multi-yolk–shell (MYS)-CuO cathodes with non-cyclized PAN (P-MYS; CuO: KB: PAN: PTFE = 6:2:1:1), with PAN cyclized at 200, 250, and 280 °C (P-200-MYS, P-250-MYS, and P-280-MYS, respectively; CuO: KB: PAN: PTFE = 6:2:1:1), and without PAN (MYS, CuO: KB: PTFE = 6:2:2). b Nyquist plots of the symmetric cells featuring different cathodes after resting for 1 week. c High-frequency region of the Nyquist plots in b