Search for new manganese-cobalt oxides as positive electrode materials for lithium batteries
| Autor: | Pierre Strobel, F. Thiery, Jean-Bruno Soupart, Jérémy Tillier, Alejandro Ibarra-Palos, Audrey Diaz |
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| Přispěvatelé: | Matériaux, Rayonnements, Structure (MRS), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), R & D Department, Erachem-Comilog, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Quenching
Renewable Energy Sustainability and the Environment 020209 energy Inorganic chemistry Intercalation (chemistry) Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.INOR]Chemical Sciences/Inorganic chemistry 021001 nanoscience & nanotechnology Electrochemistry 7. Clean energy Lithium battery chemistry.chemical_compound chemistry 0202 electrical engineering electronic engineering information engineering Lithium Lithium oxide Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Cobalt Cobalt oxide |
| Zdroj: | Journal of Power Sources Journal of Power Sources, Elsevier, 2007, 174 (2), pp.910-915. ⟨10.1016/j.jpowsour.2007.06.080⟩ |
| ISSN: | 0378-7753 1873-2755 |
| DOI: | 10.1016/j.jpowsour.2007.06.080⟩ |
| Popis: | Two new-mixed manganese–cobalt oxides for lithium battery positive electrode materials were obtained using original synthesis routes. Compound I, “LMCO” is a new form of LiMnCoO4 obtained by ion exchange from NaMnCoO4. Compound II, “MCO” is a nanometric material with formula Mn1−x CoxO≈2 obtained by quenching in specific conditions. We showed recently that the electrochemical properties of this materials were dramatically enhanced by cobalt doping [P. Strobel, F. Thiery, C. Darie, O. Proux, A. Ibarra-Palos, M. Bacia and J.B. Soupart, J. Mater. Chem. 15 (2005) 4799]. The effect of cobalt content on its electrochemical behaviour is reported in detail here. Compound I gives rise to two reversible single-phase intercalation reactions centered at 2.7 and 4.4 V on discharge, corresponding to Co3+/Co4+ and Mn3+/Mn4+ redox couples, respectively. The initial capacity is 160 mAh g−1 at low regime, but stabilizes at ca.100 mAh g−1 on extended cycling. Compound II gives a single plateau with a much higher capacity. An optimum ratio of Co:Mn = 0.20 was found and gives a capacity of 175 mAh g−1 after 60 cycles in the potential window 2.0–4.2 V. |
| Databáze: | OpenAIRE |
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