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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 Li 2 RuO 3  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/Li 2 RuO 3  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 (O 2 ) n−  species reversibly formed and dissociated during cycling. This clearly confirms that the capacity of the lithia/Li 2 RuO 3  nanocomposites can mostly be attributed to the anionic (oxygen) redox reaction.

Lithia-Based Nanocomposites Activated by Li2RuO3 for New Cathode Materials Rooted in the Oxygen Redox Reaction