Figure 1: Initial three cycles of discharge and charge. | Nature Communications

Figure 1: Initial three cycles of discharge and charge.

From: The water catalysis at oxygen cathodes of lithium–oxygen cells

Figure 1: Initial three cycles of discharge and charge.

(a) Discharge/charge profiles of the Li–O2 cells with a configuration of (Ru/MnO2/SP)/electrolyte/LiFePO4. The electrolyte is 0.5 M LiClO4 in DMSO with 120 p.p.m. H2O. (b,c) The corresponding dQ/dV curves and the contact angle of the electrolyte on the cathode. The discharge and charge cutoffs are 1,000 mAh g−1 (5,099 μC cm−2 based on the BET surface area of Ru/MnO2/SP) and 4.0 V, respectively. The potentials against Li+/Li are converted from LiFePO4. Rate: 500 mA g−1—based on the total weight of Ru, MnO2 and SP, corresponding to 0.71 μA cm−2; loading: ∼0.5 mg cm−2.

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