Lithium lanthanum titanate perovskite as an anode for lithium ion batteries

Lu Zhang, Xiaohua Zhang, Guiying Tian, Qinghua Zhang, Michael Knapp, Helmut Ehrenberg, Gang Chen, Zexiang Shen, Guochun Yang (), Lin Gu () and Fei Du ()
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Lu Zhang: Jilin University
Xiaohua Zhang: Northeast Normal University
Guiying Tian: Tianjin University of Science & Technology
Qinghua Zhang: Chinese Academy of Science
Michael Knapp: Karlsruhe Institute of Technology (KIT)
Helmut Ehrenberg: Karlsruhe Institute of Technology (KIT)
Gang Chen: Jilin University
Zexiang Shen: Jilin University
Guochun Yang: Northeast Normal University
Lin Gu: Chinese Academy of Science
Fei Du: Jilin University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Conventional lithium-ion batteries embrace graphite anodes which operate at potential as low as metallic lithium, subjected to poor rate capability and safety issues. Among possible alternatives, oxides based on titanium redox couple, such as spinel Li4Ti5O12, have received renewed attention. Here we further expand the horizon to include a perovskite structured titanate La0.5Li0.5TiO3 into this promising family of anode materials. With average potential of around 1.0 V vs. Li+/Li, this anode exhibits high specific capacity of 225 mA h g−1 and sustains 3000 cycles involving a reversible phase transition. Without decrease the particle size from micro to nano scale, its rate performance has exceeded the nanostructured Li4Ti5O12. Further characterizations and calculations reveal that pseudocapacitance dictates the lithium storage process and the favorable ion and electronic transport is responsible for the rate enhancement. Our findings provide fresh impetus to the identification and development of titanium-based anode materials with desired electrochemical properties.

Date: 2020
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DOI: 10.1038/s41467-020-17233-1

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