Abstract
Capacity and voltage retentions upon subsequent cycles for Li2RuO3 and Li2Mn0.4Ru0.6O3 (LMR) under various cut-off voltages have been investigated. The change in average and local structures upon electrochemical cycling were examined by ex-situ XRD and Ru L3-edge XANES measurements, and the relationship between the cyclic capabilities and the structural changes is discussed. The deteriorations of discharge capacity and average discharge voltage in the subsequent cycles of LMR with a charge cut-off voltage of 4.8 V vs. Li/Li+ are remarkably smaller than that with the voltage of 4.2 V. Moreover, LMR exhibits higher average discharge voltage than Li2RuO3 under a charge cut-off voltage of 4.8 V. The phase transition behavior of LMR was not similar to Li2RuO3 upon electrochemical cycling. Ru L3-edge XANES spectra measurements reveal that RuO6 octahedra in LMR charged at 4.2 V are much distorted. The local structure of RuO6 octahedra is associated with the cyclic capability of LMR and Li2RuO3.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
