Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 169, Issue 12, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/acadb3
Keywords
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Funding
- National Natural Science Foundation of China [11975238, 12275362, 22005302, 11575192]
- International Partnership Program [211211KYSB20170060, 211211KYSB20180020]
- Scientific Instrument Developing Project [ZDKYYQ20180001]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB28000000]
- Natural Science Foundation of Beijing [2182082]
- Fundamental Research Funds for the Central Universities
- China Postdoctoral Science Foundation [2020M680648]
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The high ionic conductivity of LATP can be achieved by doping B3+ and Y3+ ions in a solid-state synthesis, which broadens the ion migration path, reduces the Li+ migration energy barrier, and weakens the electrostatic attraction between Li-O bonds.
Li1+xAlxTi2-x(PO4)(3) (LATP) is a promising solid electrolyte owing to its high stability and ionic conductivity. But the ionic conductivity of LATP prepared by a conventional solid-phase method is usually one order of magnitude lower than the one prepared by the liquid-phase method. Herein, we achieve a high ionic conductivity of 1.2 mS center dot cm(-1) by doping B3+ and Y3+ ions in LATP in a solid-state synthesis, and the roles of the dopants are revealed. The incorporation of B3+ and Y3+ in the lattice broadens the ion migration path and mitigates the Li+ migration energy barrier. On the other hand, the strong electrostatic interaction between B-O and Y-O bond weakens the electrostatic attraction between the Li-O bond, which makes the Li-O bond easier to break, and greatly improves the ion conductivity of LATP. This study sheds light on the facile solid-state synthesis of LATP with a high ion conductivity and accelerates the incoming practical application in the solid-state battery. (c) 2023 The Electrochemical Society (ECS). Published on behalf of ECS by IOP Publishing Limited.
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