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LiNi0.1Mn0.1Co0.8O2 electrode material: Structural changes upon lithium electrochemical extraction |
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| Authors: | Ismael Saadoune Mohamed Labrini Mustapha Yahya Abdelmajid Almaggoussi |
| Affiliation: | a ECME, FST Marrakech, University Cadi Ayyad, BP549, Av. A. Khattabi, Marrakech, Morocco b EEMO, FST Marrakech, University Cadi Ayyad, BP549, Av. A. Khattabi, Marrakech, Morocco c IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, Germany |
| Abstract: | We reported here on the synthesis, the crystal structure and the study of the structural changes during the electrochemical cycling of layered LiNi0.1Mn0.1Co0.8O2 positive electrode material. Rietveld refinement analysis shows that this material exhibits almost an ideal α-NaFeO2 structure with practically no lithium-nickel disorder. The SQUID measurements confirm this structural result and evidenced that this material consists of Ni2+, Mn4+ and Co3+ ions.Unlike LiNiO2 and LiCoO2 conventional electrode materials, there was no structural modification upon lithium removal in the whole 0.42 ≤ x ≤1.0 studied composition range. The peaks revealed in the incremental capacity curve were attributed to the successive oxidation of Ni2+ and Co3+ while Mn4+ remains electrochemically inactive. |
| Keywords: | Layered oxides Electrode material Lithium extraction LiNi0 1Mn0 1Co0 8O2 Lithium-ion battery |
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