A quantitative and qualitative study of gas generation observed in LiFePO4–TiNb2O7 cells

Since 20 years, titanium oxide materials and in particular, lithium titanate spinel Li 4 Ti 5 O 12 (LTO) were considered as promising negative electrode materials for lithium-ion cells. In the case of the TiNb 2 O 7 compound (TNO), which has a larger theoretical lithiation capacity of 388 mAh g −1 ,...

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Bibliographic Details
Published inJournal of applied electrochemistry Vol. 54; no. 4; pp. 731 - 738
Main Authors Mercier-Guyon, Benjamin, Colin, Jean-François, Profatilova, Irina, Martinet, Sébastien
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.04.2024
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Electric cells
Electrochemistry
Electrode materials
Industrial Chemistry/Chemical Engineering
Lithium-ion batteries
Outgassing
Physical Chemistry
Research Article
Titanium oxides
Gassing
analysis
TiNb
O
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Summary:Since 20 years, titanium oxide materials and in particular, lithium titanate spinel Li 4 Ti 5 O 12 (LTO) were considered as promising negative electrode materials for lithium-ion cells. In the case of the TiNb 2 O 7 compound (TNO), which has a larger theoretical lithiation capacity of 388 mAh g −1 , few studies have focused on the outgassing of the material. In this work, we quantified the volume produced as a function of different cycling parameters and then characterized the produced species and show a prevalence of H 2 gas. The use of carbon coating as a mitigation strategy and its limitation is also discussed. Graphical abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-023-02007-6