Lee, Hae Ri Lee, Boeun Chung, Kyung Yoon Cho, Byung Won Lee, Kwan-Young Oh, Si Hyoung 2024-01-20T09:03:58Z 2024-01-20T09:03:58Z 2021-09-05 2014-08-01 0013-4686 https://pubs.kist.re.kr/handle/201004/126491 A scalable synthesis route for the preparation of fluorine-doped lithium manganese spinet was developed. The effect of 2.5% fluorine doping on the properties of aluminum-doped lithium manganese spinel was investigated by examining the electrochemical performance and structural changes. The electrochemical study indicates that the initial discharge capacity increases by about 5% while other properties, like the capacity retention and rate performance, remain almost unchanged. The structural studies indicate that no impurity phase was formed, along with only little morphological changes and a slight increase in the lattice parameter. The Mn K-edge absorption spectra clearly show that the average manganese oxidation state decreases as a result of fluorine doping and Mn L-II,L-III -edge spectra indicate that the electronic structure of the fluorine-doped spinel changes significantly, which may alleviate the intrinsic structural instability of this material. (C) 2014 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD X-RAY-ABSORPTION LI-ION OXYGEN DEFICIENCY CATHODE MATERIAL CAPACITY LOSSES PERFORMANCE TRANSITION SPECTROSCOPY DISSOLUTION INTERFACE Scalable synthesis and electrochemical investigations of fluorine-doped lithium manganese spinel oxide Article 10.1016/j.electacta.2014.05.106 1 ELECTROCHIMICA ACTA, v.136, pp.396 - 403 ELECTROCHIMICA ACTA 136 396 403 scie scopus 000340320800048 2-s2.0-84902437964 Electrochemistry Electrochemistry Article X-RAY-ABSORPTION LI-ION OXYGEN DEFICIENCY CATHODE MATERIAL CAPACITY LOSSES PERFORMANCE TRANSITION SPECTROSCOPY DISSOLUTION INTERFACE Lithium manganese spinel Fluorine doping Electrochemical properties X-ray absorption spectroscopy