Strongly correlated perovskite lithium ion shuttles

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

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Solid-state ion shuttles are of broad interest in electrochemical devices, nonvolatile memory, neuromorphic computing, and bio-mimicry 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.

Original languageEnglish (US)
Pages (from-to)9672-9677
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number39
StatePublished - Sep 25 2018

All Science Journal Classification (ASJC) codes

  • General


  • Emergent phenomena
  • Ionic conductivity
  • Mott transition
  • Neuromorphic
  • Perovskite nickelate


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