Premium
Structural environment of chloride ion‐conducting solids based on lanthanum oxychloride
Author(s) -
Nunotani Naoyoshi,
Misran Muhammad Radzi Iqbal Bin,
Inada Miki,
Uchiyama Tomoki,
Uchimoto Yoshiharu,
Imanaka Nobuhito
Publication year - 2020
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.16727
Subject(s) - conductivity , lanthanum , ion , chloride , chemistry , dopant , inorganic chemistry , electrolyte , vacancy defect , fast ion conductor , electrical resistivity and conductivity , ionic conductivity , materials science , crystallography , doping , organic chemistry , optoelectronics , electrode , electrical engineering , engineering
The effect of the structural environment on the Cl − ion conductivity was demonstrated in LaOCl‐based solid electrolytes. By replacing the La 3+ site with lower‐valent Mg 2+ or Ca 2+ ions, the conductivity was enhanced owing to the formation of a Cl − ion vacancy. Despite the same dopant content, the conductivity of La 0.8 Ca 0.2 OCl 0.8 was considerably greater than La 0.8 Mg 0.2 OCl 0.8 . This enhancement of the conductivity was influenced by the high ionicity of the Cl − ions, which facilitated the weakening of the La‐Cl bond cleavage to conduct inside the lattice. The elongation of the La‐La distance, associated with the Cl − ion conduction, could also cause an increase of the conductivity.