Abstract Discharge by a surface route at the cathode of an aprotic metal-O2 battery typically results in surface passivation by the non-conducting oxide product. This leads to low capacity and early cell death. Here we investigate the cathode discharge reaction in the potassium-O2 battery and demonstrate that discharge by a surface route is not limited to growth of thin ( 1 μm product layer, far in excess of that possible in the related lithium-O2 battery. These results demonstrate a high-capacity surface route in a metal-O2 battery for the first time and the insights revealed here have significant implications for the design of the K-O2 battery.

中文翻译：

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钾-O 2 电极处的高容量表面路径放电

摘要 在非质子金属-O2 电池的阴极通过表面路径放电通常会导致非导电氧化物产物的表面钝化。这导致低容量和早期细胞死亡。在这里，我们研究了钾氧电池中的阴极放电反应，并证明通过表面途径放电不仅限于薄（1 μm 产品层，远远超过相关锂氧电池中可能的）的生长。这些结果首次展示了金属-O2 电池中的高容量表面路线，这里揭示的见解对 K-O2 电池的设计具有重要意义。