Premium
Nonstoichiometry and Li‐ion transport in lithium zirconate: The role of oxygen vacancies
Author(s) -
Zhan Xiaowen,
Cheng YangTse,
Shirpour Mona
Publication year - 2018
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.15583
Subject(s) - materials science , lithium (medication) , doping , oxygen , conductivity , ion , vacancy defect , ceramic , dopant , electrical resistivity and conductivity , inorganic chemistry , chemistry , crystallography , composite material , optoelectronics , medicine , organic chemistry , engineering , electrical engineering , endocrinology
Abstract Understanding Li‐ion migration mechanisms and enhancing Li‐ion transport in Li 2 ZrO 3 ( LZO ) is important to its role as solid absorbent for reversible CO 2 capture at elevated temperatures, as ceramic breeder in nuclear reactors, and as electrode coating in high‐voltage lithium‐ion batteries ( LIB s). Although defect engineering is an effective way to tune the properties of ceramics, the defect structure of LZO is largely unknown. This study reports the defect structure and electrical properties of undoped LZO and a series of cation‐doped LZO s: (i) depending on their charge states, cation dopants can control the oxygen vacancy concentration in doped LZO s; (ii) the doped LZO s with higher oxygen vacancy concentrations exhibit better Li + conductivity, and consequently faster high‐temperature CO 2 absorption. In fact, the Fe ( II )‐doped LZO shows the highest Li‐ion conductivity reported for LZO s, reaching 3.3 mS /cm at ~300°C that is more than 1 order of magnitude higher than that of the undoped LZO .