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Article Abstract
Lithium ruthenium oxide (LiRuO) is an archetypal lithium rich cathode material (LRCM) with both cation and anion redox reactions (ARRs). Commonly, the instability of oxygen redox activities has been regarded as the root cause of its performance degradation in long-term operation. However, we find that not triggering ARRs does not improve and even worsens its cyclability due to the detrimental strain accumulation induced by Ru redox activities. To solve this problem, we demonstrate that F-doping in LiRuO can alter its preferential orientation and buffer interlayer repulsion upon Ru redox, both of which can mitigate the strain accumulation along the -axis and improve its structural stability. This work highlights the importance of optimizing cation redox reactions in LRCMs and provides a new perspective for their rational design.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11129289 | PMC |
| http://dx.doi.org/10.1021/acs.jpclett.4c00748 | DOI Listing |
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