S 89 Structural aspects of lithium transferin solid electrolytes Li2xZn2–3xTi1+xO4 (0.33 / I. A. Leonidov, O. N. Leonidova, R. F. Samigullina, M. V. Patrakeev // Journal of Structural Chemistry. - 2004. - Vol. 45, № 2. - P.262-268 : ил. - Bibliogr. : p. 268 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАСТВОРЫ ТВЕРДЫЕ -- ЭЛЕКТРОЛИТЫ ТВЕРДЫЕ -- ЛИТИЙ -- ПРОВОДИМОСТЬ -- ШПИНЕЛИ Аннотация: Solid solutions Li2xZn2–3xTi1+xO4, where x = 1/3, 1/2, 3/5, 2/3, were studied by powder X-ray diffractometry and differential thermal analysis. Conductivity measurements have been performed in the gas phase at different temperatures and oxygen pressures. Distribution of cations over the sites of the spinel structure has been determined. Conductivity increases substantially with lithium concentration. The high lithium conductivity of Li3Zn0.5Ti4O10 (x = 3/5) and Li4Ti5O12 (x = 2/3) is the result of two sequential phase transitions associated with different lithium distributions in high-temperature phases with defective NaCl type structures. Possible routes of lithium ion transport are discussed and rationalized based on the conductivity and crystal data Полный текст |