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Lithium lanthanum titanate perovskite as an anode for lithium ion batteries

Zhang, L.; Zhang, X.; Tian, G.; Zhang, Q.; Knapp, M.; Ehrenberg, H.; Chen, G.; Shen, Z.; Yang, G.; Gu, L.; Du, F.

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 Li$_{4}$Ti$_{5}$O$_{12}$, have received renewed attention. Here we further expand the horizon to include a perovskite structured titanate La$_{0.5}$Li$_{0.5}$TiO$_{3}$ 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 Li$_{4}$Ti$_{5}$O$_{12}$. 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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000122783
Veröffentlicht am 11.09.2020
DOI: 10.1038/s41467-020-17233-1
Zitationen: 14
Web of Science
Zitationen: 13
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 13.07.2020
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000122783
HGF-Programm 37.01.02 (POF III, LK 01) Components and Cells
Erschienen in Nature Communications
Verlag Nature Research
Band 11
Heft 1
Seiten Art. Nr.: 3490
Nachgewiesen in Web of Science
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