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The Ionic Conductivity of Solid Electrolytes for Li 4+x M x Si 1–x O 4 ‐yLi 2 O (M=Al, B) Systems
Author(s) -
Chen RuFen,
Song XiuQin
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200002
Subject(s) - chemistry , ionic conductivity , sintering , conductivity , analytical chemistry (journal) , fast ion conductor , lithium (medication) , phase (matter) , electrolyte , oxide , pellets , electrical resistivity and conductivity , alkali metal , mineralogy , inorganic chemistry , materials science , composite material , medicine , organic chemistry , electrode , chromatography , endocrinology , engineering , electrical engineering
Abstract The Li 4+x M x Si 4+x O 4 ‐yLi 2 O (M=Al, B; x = 0 to 0.6, y = 0 to 0.5) ion conductors were prepared by the Sol‐Gel method and examined in detail. The powder and sintered samples were characterized by DTA‐TG, XRD, SEM, and AC impedance techniques. The experimental results show that the conductivity and sinterability in creased with the amount of excess lithium oxide in the silicate. The Li 2 O phase acts as a flux to accelerate the sintering process and to obtain high conductivity of grain boundaries. The particle size of the sintered pellets is about 0.25 μm. The maximum conductivity at 200 °C is 5.40 × 10 −3 s cm −1 for Li 4.4 Al 0.4 Si 0.6 O 4 ‐0.3Li 2 O.