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Electrode characteristics of Li2Ti3O7-ramsdellite processed by mechanical grinding

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Abstract

The effect of mechanical grinding on the electrochemical properties of Li2Ti3O7 regarding lithium insertion is studied. X-ray diffraction experiments of milling compounds showed a progressively amorphization of the crystalline material due to both crystalline size decreasing and internal strain increasing. These structural modifications are reflected in the electrochemical behavior of Li2Ti3O7, when it is used as the positive electrode in lithium cells. As a function of milling time a higher specific capacity is obtained during the first discharge of the cell, but when charging an increasing in the irreversible capacity is observed. The most promising Li2Ti3O7 based electrode has been achieved, under our experimental conditions, for 13 hours milling that produces a compound with crystallite size of approximately 20 nm.

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Authors and Affiliations

  1. Departamento de Química Inorgánica, Fac. Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain

    M. E. Arroyo Y De Dompablo

  2. Departamento de Materiales, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911, Leganés, Spain

    J. GarcíA & A. Várez

  3. Departamento de Química Inorgánica y Materiales, Facultad de Ciencias Experimentales y Técnicas, Universidad San Pablo CEU, Urbanización Montepríncipe, 28668, Madrid, spain

    F. GARCía-Alvarado

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  1. M. E. Arroyo Y De Dompablo
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  3. A. Várez
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  4. F. GARCía-Alvarado
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Dompablo, M.E.A.Y.D., GarcíA, J., Várez, A. et al. Electrode characteristics of Li2Ti3O7-ramsdellite processed by mechanical grinding. Journal of Materials Science 37, 3981–3986 (2002). https://doi.org/10.1023/A:1019688413180

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