KIT | KIT-Bibliothek | Impressum | Datenschutz

Probing Capacity Trends in MLi2Ti6O14 Lithium-Ion Battery Anodes Using Calorimetric Studies

Jayanthi, K.; Chaupatnaik, Anshuman; Barpanda, Prabeer 1; Navrotsky, Alexandra
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract:

Due to higher packing density, lower working potential, and area specific impedance, the MLi2Ti6O14 (M = 2Na, Sr, Ba, and Pb) titanate family is a potential alternative to zero-strain Li4Ti5O12 anodes used commercially in Li-ion batteries. However, the exact lithiation mechanism in these compounds remains unclear. Despite its structural similarity, MLi2Ti6O14 behaves differently depending on charge and size of the metal ion, hosting 1.3, 2.7, 2.9, and 4.4 Li per formula unit, giving charge capacity values from 60 to 160 mAh/g in contrast to the theoretical capacity trend. However, high-temperature oxide melt solution calorimetry measurements confirm strong correlation between thermodynamic stability and the observed capacity. The main factors controlling energetics are strong acid–base interactions between basic oxides MO, Li2O and acidic TiO2, size of the cation, and compressive strain. Accordingly, the energetic stability diminishes in the order Na2Li2Ti6O14 > BaLi2Ti6O14 > SrLi2Ti6O14 > PbLi2Ti6O14. This sequence is similar to that in many other oxide systems. ... mehr

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2470-1343
KITopen-ID: 1000152916
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in ACS Omega
Verlag American Chemical Society (ACS)
Band 7
Heft 46
Seiten 42482–42488
Vorab online veröffentlicht am 08.11.2022
Schlagwörter Anions, Enthalpy, Lithium, Oxides, Stability
Nachgewiesen in Web of Science
Scopus
Dimensions
OpenAlex
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie

Verlagsausgabe §
DOI: 10.5445/IR/1000152916
Veröffentlicht am 21.11.2022
Originalveröffentlichung
DOI: 10.1021/acsomega.2c05701
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Seitenaufrufe: 63
seit 21.11.2022
Downloads: 44
seit 22.11.2022
Cover der Publikation
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page