Fig. 6.

a Cycling performance of the rechargeable ZAB using Ni_0.2Co_0.8Se at 10 mA cm⁻², where each cycle lasted 5 min. b Charge–discharge polarization curves of the rechargeable ZABs using Ni_0.2Co_0.8Se and Pt/C + RuO₂. c Polarization and power density curves of the ZABs using the Ni_0.2Co_0.8Se and Pt/C + RuO₂ catalysts. d Schematic of the self-made all-solid-state ZAB. e Cycling performance of the all-solid-state ZAB using Ni_0.2Co_0.8Se at 2 mA cm⁻², where each cycle lasted 2 min. f Charge–discharge polarization curves of the all-solid-state ZAB using Ni_0.2Co_0.8Se. g Polarization and power density curves of the all-solid-state ZAB using Ni_0.2Co_0.8Se. h Open-circuit voltage of an all-solid-state ZAB and i an LED circuit board powered by three all-solid-state ZABs