Valence evaluation of LiMnO2 and related battery materials by x-ray absorption spectroscopy
| Autor: | WADATI, H, HAWTHORN, DG, REGIER, TZ, CHEN, G, Hitosugi, Taro, MIZOKAWA, T, TANAKA, A, SAWATZKY, GA |
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| Rok vydání: | 2010 |
| Předmět: |
Condensed Matter - Materials Science
X-ray absorption spectroscopy Materials science Valence (chemistry) Strongly Correlated Electrons (cond-mat.str-el) Physics and Astronomy (miscellaneous) Analytical chemistry Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Cathode 3. Good health law.invention Condensed Matter - Strongly Correlated Electrons law 0103 physical sciences 010306 general physics 0210 nano-technology Charge exchange |
| Zdroj: | Applied Physics Letters. 97:022106 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.3463468 |
| Popis: | We present an x-ray absorption study of the oxidation states of transition-metal-ions of LiMnO2 and its related materials, widely used as cathodes in Li-ion batteries. The comparison between the obtained spectrum and the configuration-interaction cluster-model calculations showed that the Mn3+ in LiMnO2 is a mixture of the high-spin and low-spin states. We found that Li deficiencies occur in the case of Cr substitution, whereas there are no Li deficiencies in the case of Ni substitution. We conclude that the substitution of charge-transfer-type Ni or Cu is effective for LiMnO2 battery materials. 3 pages, 3 figures |
| Databáze: | OpenAIRE |
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