Sample Dependence of Magnetism in the Next-Generation Cathode Material LiNi0.8Mn0.1Co0.1O2
| Autor: | Siân E. Dutton, Ronald I. Smith, David A. Keen, Chao Xu, Joseph A. M. Paddison, Andrew Wildes, Clare P. Grey, Paromita Mukherjee, Zachary Ruff |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter - Materials Science
Strongly Correlated Electrons (cond-mat.str-el) Chemistry Magnetometer Magnetism Neutron diffraction Analytical chemistry Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Neutron scattering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Ion Inorganic Chemistry Condensed Matter - Strongly Correlated Electrons law Elemental analysis Crystallite Physical and Theoretical Chemistry 0210 nano-technology Chemical composition |
| Zdroj: | Inorganic Chemistry. 60:263-271 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.0c02899 |
| Popis: | We present a structural and magnetic study on two batches of polycrystalline LiNi$_{0.8}$Mn$_{0.1}$Co$_{0.1}$O$_2$ (commonly known as Li NMC 811), a Ni-rich Li ion battery cathode material, using elemental analysis, X-ray and neutron diffraction, magnetometry, and polarised neutron scattering measurements. We find that the samples, labelled S1 and S2, have the composition Li$_{1-x}$Ni$_{0.9+x-y}$Mn$_y$Co$_{0.1}$O$_2$, with $x = 0.025(2)$, $y = 0.120(2)$ for S1 and $x = 0.002(2)$, $y = 0.094(2)$ for S2, corresponding to different concentrations of magnetic ions and excess Ni$^{2+}$ in the Li$^+$layers. Both samples show a peak in the zero-field cooled (ZFC) dc susceptibility at 8.0(2) K but the temperature at which the ZFC and FC (field-cooled) curves deviate is substantially different: 64(2) K for S1 and 122(2) K for S2. Ac susceptibility measurements show that the transition for S1 shifts with frequency whereas no such shift is observed for S2 within the resolution of our measurements. Our results demonstrate the sample dependence of magnetic properties in Li NMC 811, consistent with previous reports on the parent material LiNiO$_2$. We further establish that a combination of experimental techniques are necessary to accurately determine the chemical composition of next generation battery materials with multiple cations. Revised manuscript, 27 pages main text, 6 figures, 5 pages supplementary material. Accepted for publication in Inorganic Chemistry |
| Databáze: | OpenAIRE |
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