Lithium–oxygen batteries (LOBs), despite high-energy densities, generally suffer from poor cycling performances, which put severe constraints on their commercialization. Herein, we demonstrate a cathode catalyst featuring a hollow structure with high-density, low-coordinated Ru active sites. The high-density low-coordinated Ru active sites could efficiently activate oxygen via bridge-adsorption configuration, and the hollow architecture could optimize the access of oxygen to the active sites and accommodate more Li₂O₂. These structural features could direct the Li₂O₂ to grow along the (010) faces into a unique highly dispersed fluff-like morphology, which could be readily decomposed in charge process, thereby conferring a long battery stability under high-rate current, the LOB capable of running stably for >700 cycles under the high-rate current density of 1 A·g^–1.

中文翻译：

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通过锂氧电池的高密度低配位 Ru 位点对氧进行有序吸附


锂氧电池 （LOB） 尽管能量密度高，但通常循环性能不佳，这严重限制了其商业化。在此，我们展示了一种具有中空结构的阴极催化剂，具有高密度、低配位的 Ru 活性位点。高密度低配位 Ru 活性位点可以通过桥吸附构型高效活化氧，空构结构可以优化氧对活性位点的获取并容纳更多的 Li₂O₂。这些结构特征可以引导 Li₂O₂ 沿着 （010） 面生长成独特的高度分散的绒毛状形态，在充电过程中很容易分解，从而赋予电池在高倍率电流下的长期稳定性，LOB 能够在 1 A·g^–1 的高倍率电流密度下稳定运行 >700 次循环。