@article{79658d4ce60e452ba60993225dfa8713,
title = "Operando resonant soft X-ray emission spectroscopy of the LiMn2O4 cathode using an aqueous electrolyte solution",
abstract = "The Mn 3d electronic-structure change of the LiMn2O4 cathode during Li-ion extraction/insertion in an aqueous electrolyte solution was studied by operando resonant soft X-ray emission spectroscopy (RXES). The Mn L3 RXES spectra for the charged state revealed the Mn4+ state with strong charge-transfer from the O 2p to Mn 3d orbitals dominates, while for the open-circuit-voltage and discharged states it is ascribed to the mixture of sites with Mn3+ and Mn4+ states. The degree of charge transfer is significantly different between the Mn3+ and Mn4+ states, indicating that the redox reaction takes place on the strongly-hybridized Mn 3d-O 2p orbital rather than the localized Mn 3d orbital.",
author = "Daisuke Asakura and Yusuke Nanba and Hideharu Niwa and Hisao Kiuchi and Jun Miyawaki and Masashi Okubo and Hirofumi Matsuda and Yoshihisa Harada and Eiji Hosono",
note = "Funding Information: The XAS and RXES measurements were performed by the joint research in SRRO and ISSP, the University of Tokyo (Proposal No. 2017A7531, 2018A7573, 2018B7584, 2019A7595 and 2020A7486). This work was partly supported by JSPS KAKENHI Grant Number JP19H05717 (Grant-in-Aid for Scientific Research on Innovative Area: Aquatic Functional Materials). Publisher Copyright: {\textcopyright} 2022 The Royal Society of Chemistry.",
year = "2022",
month = jun,
day = "8",
doi = "10.1039/d2cp01040b",
language = "English",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
}