Abstract
AbstractThe local structure and electronic states of Co3+ substituted lithium manganate spinels of the composition Li(Mn2‐xCox)O4 (0 ≤ x ≤ 0.4) have been probed by X‐ray absorption near‐edge structure (XANES) and extended X‐ray absorption fine structure (EXAFS) spectroscopies at the Mn and Co edges. The substitution of Co3+ into the Mn sites causes an oxidation of Mn3+ to Mn4+, decreasing the localized Jahn‐Teller distortion of the lattice. This in turn leads to a shortening of the Mn‐O(M) bond length and a reduction in local structural disorder of the Mn(Co)O6 octahedra. The data show that the replacement of d4 Mn3+ by d6 Co3+ in the octahedral sites of the spinel structure eliminates the local disorder in the lattice around the Mn3+O6 octahedra which are distorted by Jahn‐Teller stabilization of the electronic state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.