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Strongly correlated perovskite lithium ion shuttles

by Lim, Dawgen , Narayanan, Badri , Waluyo, Iradwikanari , Yildiz, Bilge , Sankaranarayanan, Subramanian K. R. S. , Sun, Cheng-Jun , Dong, Yongqi , Sun, Yifei , Ramanathan, Shriram , Zhang, Zhen , Hunt, Adrian , Gamage, Sampath , Abate, Yohannes , Tanaka, Hidekazu , Kotiuga, Michele , Cherukara, Mathew , Zhou, Hua , Kou, Ronghui , Pol, Vilas G. , Rabe, Karin M. , Lu, Qiyang , Hattori, Azusa N.

in Applied Physical Sciences / Biomimetics / Cations / Computer memory / Conduction / Conductivity / Conductors / Dopants / Doping / Electrochemistry / Electron transport / emergent phenomena / Ion currents / ionic conductivity / Ions / Lithium / Lithium ions / MATERIALS SCIENCE / Memory devices / Mott transition / neuromorphic / Perovskite / perovskite nickelate / Perovskites / Physical Sciences / Rare earth elements / Unit cell

2018

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2018

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2018

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Journal Article

Strongly correlated perovskite lithium ion shuttles

Lim, Dawgen,

Narayanan, Badri,

Waluyo, Iradwikanari,

Yildiz, Bilge,

Sankaranarayanan, Subramanian K. R. S.,

Sun, Cheng-Jun,

Dong, Yongqi,

Sun, Yifei,

Ramanathan, Shriram,

Zhang, Zhen,

Hunt, Adrian,

Gamage, Sampath,

Abate, Yohannes,

Tanaka, Hidekazu,

Kotiuga, Michele,

Cherukara, Mathew,

Zhou, Hua,

Kou, Ronghui,

Pol, Vilas G.,

Rabe, Karin M.,

Lu, Qiyang,

Hattori, Azusa N.

2018

Overview

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 SmNiO₃ (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.

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Publisher

National Academy of Sciences,Proceedings of the National Academy of Sciences

Subject

Applied Physical Sciences

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