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  • Structure and electrochemical performance of ▫$Li_2MnSiO_4$▫ and ▫$Li_2FeSiO_4$▫ as potential Li-battery cathode materials
    Dominko, Robert ...
    Recently, preparation and preliminary testing of Li2FeSiO4, a representative of a new class of Li storage materials, has been reported šA. Nyten, A. Abouimrane, M. Armand, T. Gustaffson, J.O. Thomas, ... Electrochem. Commun. 7 (2005) 156đ. In the present paper, we report preparation of another material from this classČ Li2MnSiO4. To the best of our knowledge, the existence of this compound has not been reported so far. Similarly as in the case of the LiMPO4 materials family (M = Fe, Mn), the Mn analogue shows considerably poorer electrochemical performance. Quite unexpectedly, however, the Mn analogue shows a better stability, especially under harsh conditions. This property appears to be crucial for determination of detailed structural features of this class of materials. The obtained structure reveals partial occupation of alternate tetrahedral sites by Li and Mn, thus implying a high ionic conductivity of these materials. The poor electrochemical performance ismost likely due to poor electron wiring.
    Vir: Electrochemistry communications. - ISSN 1388-2481 (Vol. 8, no. 2, 2006, str. 217-222)
    Vrsta gradiva - članek, sestavni del
    Leto - 2006
    Jezik - angleški
    COBISS.SI-ID - 3427610