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Sintering behavior of garnet‐type Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 in Li 2 CO 3 atmosphere and its electrochemical property
Author(s) -
Huang Zeya,
Liu Kai,
Chen Linhui,
Lu Yirui,
Li Yutao,
Wang ChangAn
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12735
Subject(s) - materials science , sintering , ceramic , ionic conductivity , analytical chemistry (journal) , electrolyte , conductivity , fast ion conductor , phase (matter) , solid solution , ion , mineralogy , metallurgy , chemistry , electrode , physics , organic chemistry , chromatography , quantum mechanics
The garnet‐type solid Li‐ion conductor, Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , is viewed as a promising solid‐state electrolyte for the next‐generation high‐performance Li‐ion battery because of its high ionic conductivity and stability. The previous researches, in order to avoid Li volatilization loss during solid‐state reaction of sintering, mother powder with the same composition as green bodies was usually used to cover the samples, it would waste the expensive raw materials and increase the fabrication cost. In this study, a new method was proposed to prepare the Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 ceramic solid‐state electrolyte where the Li loss is compensated by the outside Li 2 CO 3 . Samples prepared by this method have pure garnet phase and compact micromorphology with few pores. These samples have a high Li‐ion conductivity of 2.9×10 −4 S/cm and a low activation energy of 0.37 eV at room temperature. The electronic conductivity is 1.08×10 −8 S/cm, which can be neglected for solid‐state electrolyte.