Sintering analysis of garnet-type ceramic as oxide solid electrolytes for rapid Li+ migration

被引：7
作者：
Zhao, Xiaojia [1 ,2 ]
Gao, Jian [1 ]
Khalid, Bilal [3 ]
Zijian, Zhao [1 ]
Wen, Xintao [1 ]
Geng, Chong [1 ]
Huang, Youfu [1 ]
Tian, Guiying [1 ]
机构：
[1] Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin Key Lab Brine Chem Engn & Resource Ecouti, TEDA, 13th Ave 29, Tianjin 300457, Peoples R China
[2] Hebei Normal Univ, Coll Chem & Mat Sci, Hebei Key Lab Inorgan Nanomat, South Second Ring East Rd 20, Shijiazhuang, Hebei, Peoples R China
[3] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2022年 / 42卷 / 15期
关键词：
Garnet-oxide solid electrolyte; Metallic doping; Sintering process; Pair diffraction function; DOPED LI7LA3ZR2O12; IONIC-CONDUCTIVITY; LITHIUM; AL; STABILITY; 1ST-PRINCIPLES; SEGREGATION; TRANSPORT;
D O I：
10.1016/j.jeurceramsoc.2022.08.053
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Metallic doping can stabilize cubic phase Li7La3Zr2O12 (LLZO) solid electrolyte for high conductivity, due to the enhanced vacancies and disordered Li-site. However, the understanding of metallic doping in the crystal lattice during the high-temperature sintering process is still not clear. In present study, a gradient series of Fe doped LLZO are formulated via solid-phase reaction, and then investigated through crystal analysis and morphological characterization. Pair distribution function essay implies that doped Fe3+ promotes random distribution of Li+ over the available sites in the located crystal. Additionally, the ceramic morphology confirms that the particles sizes in LLZO pellets suddenly grow above 1000 degrees C, and Fe doping can obviously suppress Li loss above 600 degrees C. As a result, the LLZF0.15 exhibits the relatively high ionic conductivity of 1.99 x 10(-5) S cm(-1) at 45 degrees C.
引用
收藏
页码：7063 / 7071
页数：9
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