Strongly correlated perovskite lithium ion shuttles
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 13, 2018
- Source ID
- 10.1073/pnas.1805029115
Entities
People
- Adrian Hunt
- Azusa N. Hattori
- Badri Narayanan
- Bilge Yıldız
- Cheng-jun Sun
- Dawgen Lim
- Hidekazu Tanaka
- Hua Zhou
- Iradwikanari Waluyo
- Karin M. Rabe
- Mathew J Cherukara
- Michele Kotiuga
- Qiyang Lu
- R. A. Adams
- Ronghui Kou
- Sampath Gamage
- Shriram Ramanathan
- Subramanian K R S Sankaranarayanan
- Yifei Sun
- Yohannes Abate
- Yongqi Dong
- Zhen Zhang
Organizations
- Air Force Office of Scientific Research
- Argonne National Laboratory
- Army Research Office
- Brookhaven National Laboratory
- Japan Society for the Promotion of Science
- Massachusetts Institute of Technology
- National Science Foundation
- Office of Naval Research
- Osaka University
- Purdue University
- Rutgers University
- United States Department of Energy
- University of Georgia