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Soft X‐ray Absorption Near Edge Structure Analysis on Lithium Manganese Oxide Prepared by Microwave Heating
Author(s) -
Kobayashi Shota,
Usui Tatsuya,
Ikuta Hiromasa,
Uchimoto Yoshiharu,
Wakihara Masataka
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.01002.x
Subject(s) - manganese , x ray absorption spectroscopy , lithium (medication) , oxygen , microwave , inorganic chemistry , oxide , absorption spectroscopy , lithium oxide , materials science , absorption (acoustics) , chemistry , absorption edge , analytical chemistry (journal) , electrochemistry , electrode , lithium vanadium phosphate battery , metallurgy , optics , composite material , optoelectronics , endocrinology , medicine , physics , organic chemistry , quantum mechanics , chromatography , band gap
Microwave heating, which is recognized as a time‐saving and an energy‐efficient process, was used to synthesize manganese oxide from various starting materials. LiOH and MnO 2 (electrochemically prepared manganese dioxide, EMD) were used as starting materials; ε‐MnO 2 ‐type lithium manganese oxide that showed excellent cycle ability was the result of 3 min of microwave heating. A change in electronic structure was investigated using manganese L ‐edge and oxygen K ‐edge X‐ray absorption spectroscopy (XAS). The XAS results indicated that the oxidation‐reduction reaction took place in the manganese 3 d and in the oxygen 2 p orbitals during the charge‐discharge process and that Jahn‐Teller distortion occurred in the reduced samples.