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High lithium ionic conductivity in the garnet‐type oxide Li 7−2 x La 3 Zr 2− x Mo x O 12 ( x =0‐0.3) ceramics by sol‐gel method
Author(s) -
Liu Xiaoting,
Li Yuan,
Yang Tiantian,
Cao Zhenzhu,
He Weiyan,
Gao Yanfang,
Liu Jinrong,
Li Guorong,
Li Zhi
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14736
Subject(s) - ionic conductivity , materials science , analytical chemistry (journal) , microstructure , scanning electron microscope , conductivity , lithium (medication) , molybdenum , sintering , ceramic , doping , electrical resistivity and conductivity , sol gel , phase (matter) , x ray crystallography , mineralogy , diffraction , metallurgy , chemistry , nanotechnology , composite material , optics , medicine , optoelectronics , engineering , electrode , chromatography , organic chemistry , electrical engineering , electrolyte , endocrinology , physics
Lithium garnet‐type oxides Li 7−2 x La 3 Zr 2− x M o x O 12 ( x =0, 0.1, 0.2, 0.3) ceramics were prepared by a sol‐gel method. The influence of molybdenum on the structure, microstructure and conductivity of Li 7 La 3 Zr 2 O 12 were investigated by X‐ray diffraction, scanning electron microscopy, and impedance spectroscopy. The cubic phase Li 7 La 3 Zr 2 O 12 has been stabilized by partial substitution of Mo for Zr at low temperature. The introduction of Mo ( x ≥0.1) can accelerate densification. Li 6.6 La 3 Zr 1.8 Mo 0.2 O 12 sintered at lower temperature 1100°C for 3 hours exhibits highest total ionic conductivity of 5.09 × 10 −4 S/cm. Results indicate that the Mo doping LLZO synthesized by sol‐gel method effectively lowers its sintering temperature and improves the ionic conductivity.