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Na$_{0.5}$Bi$_{0.5}$TiO$_3$ perovskite anode for lithium-ion batteries

Chintha, Sridivya; Atif, Shahan; Chaupatnaik, Anshuman; Golubnichiy, Alexander; Abakumov, Artem M.; Barpanda, Prabeer 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract:

Lithium-ion battery technology, currently the most popular form of mobile energy storage, primarily uses graphite as the anode. However, the graphite anode, owing to its low working voltage at high current density, is susceptible to lithium plating and related safety risks. In this direction, perovskite oxides like CaSnO$_3$, more recently PbTiO$_3$, have been explored as alternate anode materials due to their higher operational voltage. Extending this family of perovskites, we introduce a widely used lead-free piezoelectric ceramic Na$_{0.5}$Bi$_{0.5}$TiO$_3$ (NBT) as a potential anode for lithium-ion batteries. NBT has an average voltage of 0.7 V and a high capacity of 220 mA h g(-1). Ex situ diffraction and spectroscopy tools were used to understand the charge storage mechanism. The oxide undergoes an irreversible conversion reaction in the first discharge, followed by reversible (de)alloying of Bi with Li in the subsequent cycles. This material is airstable, with a capacity retention of 82% up to 50 cycles at a high current of 100 mA g(-1) without any optimization. Furthermore, limiting the voltage window increases the cycle life to 200 cycles. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000175828
Veröffentlicht am 04.11.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 22.10.2024
Sprache Englisch
Identifikator ISSN: 2398-4902
KITopen-ID: 1000175828
Erschienen in Sustainable Energy & Fuels
Verlag Royal Society of Chemistry (RSC)
Band 8
Heft 21
Seiten 5058–5064
Vorab online veröffentlicht am 30.09.2024
Nachgewiesen in Scopus
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