Lithia-based materials are promising cathodes based on an anionic (oxygen) redox reaction for lithium ion batteries due to their high capacity and stable cyclic performance. In this study, the properties of a lithia-based cathode activated by Li2RuO3 were characterized. Ru-based oxides are expected to act as good catalysts because they can play a role in stabilizing the anion redox reaction. Their high electronic conductivity is also attractive because it can compensate for the low conductivity of lithia. The lithia/Li2RuO3 nanocomposites show stable cyclic performance until a capacity limit of 500 mAh g-1 is reached, which is below the theoretical capacity (897 mAh g-1) but superior to other lithia-based cathodes. In the XPS analysis, while the Ru 3d peaks in the spectra barely changed, peroxo-like (O2)n- species reversibly formed and dissociated during cycling. This clearly confirms that the capacity of the lithia/Li2RuO3 nanocomposites can mostly be attributed to the anionic (oxygen) redox reaction.

中文翻译：

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Li2RuO3活化的基于氧化锂的纳米复合材料，用于在氧气氧化还原反应中生根的新型阴极材料。

基于锂的材料由于其高容量和稳定的循环性能而成为基于用于锂离子电池的阴离子（氧）氧化还原反应的有前途的阴极。在这项研究中，表征了Li2RuO3活化的基于锂的阴极的特性。钌基氧化物有望充当良好的催化剂，因为它们可以在稳定阴离子氧化还原反应中发挥作用。它们的高电子电导率也很有吸引力，因为它可以补偿锂电的低电导率。锂/ Li2RuO3纳米复合材料显示出稳定的循环性能，直到达到500 mAh g-1的容量极限，该极限低于理论容量（897 mAh g-1），但优于其他基于锂的阴极。在XPS分析中，光谱中的Ru 3d峰几乎没有变化，过氧化物样（O2）n-物种在循环过程中可逆地形成和解离。这清楚地证实了锂/ Li2RuO3纳米复合材料的容量主要归因于阴离子（氧）氧化还原反应。