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Strongly correlated perovskite lithium ion shuttles

Authors :
Zhen Zhang
Ronghui Kou
Bilge Yildiz
Cheng-Jun Sun
Yongqi Dong
Michele Kotiuga
Adrian Hunt
Hidekazu Tanaka
Sampath Gamage
Shriram Ramanathan
Badri Narayanan
Vilas G. Pol
Yohannes Abate
Daw Gen Lim
Qiyang Lu
Mathew J. Cherukara
Iradwikanari Waluyo
Yifei Sun
Subramanian K. R. S. Sankaranarayanan
Azusa N. Hattori
Hua Zhou
Karin M. Rabe
Source :
Proceedings of the National Academy of Sciences. 115:9672-9677
Publication Year :
2018
Publisher :
Proceedings of the National Academy of Sciences, 2018.

Abstract

Solid-state ion shuttles are of broad interest in electrochemical devices, nonvolatile memory, neuromorphic computing, and biomimicry utilizing synthetic membranes. Traditional design approaches are primarily based on substitutional doping of dissimilar valent cations in a solid lattice, which has inherent limits on dopant concentration and thereby ionic conductivity. Here, we demonstrate perovskite nickelates as Li-ion shuttles with simultaneous suppression of electronic transport via Mott transition. Electrochemically lithiated SmNiO 3 (Li-SNO) contains a large amount of mobile Li + located in interstitial sites of the perovskite approaching one dopant ion per unit cell. A significant lattice expansion associated with interstitial doping allows for fast Li + conduction with reduced activation energy. We further present a generalization of this approach with results on other rare-earth perovskite nickelates as well as dopants such as Na + . The results highlight the potential of quantum materials and emergent physics in design of ion conductors.

Details

ISSN :
10916490 and 00278424
Volume :
115
Database :
OpenAIRE
Journal :
Proceedings of the National Academy of Sciences
Accession number :
edsair.doi.dedup.....c197c533399b68b664b5b7f6e9f73103
Full Text :
https://doi.org/10.1073/pnas.1805029115