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나노입자 연구단
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Synergistic multi-doping effects on the Li7La3Zr2O12 solid electrolyte for fast lithium ion conduction

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Title
Synergistic multi-doping effects on the Li7La3Zr2O12 solid electrolyte for fast lithium ion conduction
Author(s)
Shin, DO; Oh, K; Kim, KM; Kyu-Young Park; Byungju Lee; Lee, YG; Kisuk Kang
Publication Date
2015-12
Journal
SCIENTIFIC REPORTS, v.5, no., pp.18053 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Here, we investigate the doping effects on the lithium ion transport behavior in garnet Li7La3Zr2O12 (LLZO) from the combined experimental and theoretical approach. The concentration of Li ion vacancy generated by the inclusion of aliovalent dopants such as Al-3+ plays a key role in stabilizing the cubic LLZO. However, it is found that the site preference of Al in 24d position hinders the three dimensionally connected Li ion movement when heavily doped according to the structural refinement and the DFT calculations. In this report, we demonstrate that the multi-doping using additional Ta dopants into the Al-doped LLZO shifts the most energetically favorable sites of Al in the crystal structure from 24d to 96 h Li site, thereby providing more open space for Li ion transport. As a result of these synergistic effects, the multi-doped LLZO shows about three times higher ionic conductivity of 6.14 x 10(-4) S cm(-1) than that of the singly-doped LLZO with a much less efforts in stabilizing cubic phases in the synthetic condition
URI
http://pr.ibs.re.kr/handle/8788114/2380
DOI
10.1038/srep18053
ISSN
2045-2322
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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