Issue 14, 2025

Compositional study of Ti–Nb oxide (TiNb2O7, Ti2Nb10O29, Ti2Nb14O39, and TiNb24O62) anodes for high power Li ion batteries

Abstract

Titanium niobium oxides (TNOs) are attractive anode materials for high power density Li-ion batteries. However, the details of capacity storage in TNOs are not fully understood today as it depends on the Ti and Nb composition and their changes in the oxidation state. This is further complicated by a wide variation in gravimetric capacities reported in the literature for TNO anodes. Therefore, in this work, we systematically synthesise TiNb2O7, Ti2Nb10O29, Ti2Nb14O39, and TiNb24O62 particles using the same solid state reaction approach and report their electrochemical properties via galvanostatic cycling, cyclic voltammetry, and the galvanostatic intermittent titration technique (GITT). Furthermore, we use operando X-ray absorption spectroscopy (XAS) to investigate the redox reactions taking place in each of these compositions, which provides new insights into their charge storage mechanisms. We found that of the materials tested, TiNb2O7 anodes show the best cycling and rate performance, which could be related to the higher utilization of Nb redox revealed via operando XAS analysis.

Graphical abstract: Compositional study of Ti–Nb oxide (TiNb2O7, Ti2Nb10O29, Ti2Nb14O39, and TiNb24O62) anodes for high power Li ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
15 Nov 2024
Accepted
06 Feb 2025
First published
19 Feb 2025
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2025,13, 9878-9885

Compositional study of Ti–Nb oxide (TiNb2O7, Ti2Nb10O29, Ti2Nb14O39, and TiNb24O62) anodes for high power Li ion batteries

Y. Son, H. Jang, B. Wen, C. Jo, A. S. Groombridge, A. Boies, M. G. Kim and M. De Volder, J. Mater. Chem. A, 2025, 13, 9878 DOI: 10.1039/D4TA08141B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements