Issue 3, 2024

The Nb–Ti–W–O system as safe high-power anodes for Li-ion batteries

Abstract

New materials are currently needed to serve as anodes in Li-ion batteries for applications that require extreme safety, long lifetimes, high power and improved energy density. High-power anodes based on niobium oxides are currently under investigation with Nb–Ti–O and Nb–W–O pseudobinaries having received much attention. To date, no material in the Nb–Ti–W–O system has been explored. Herein, 137 compositions are synthesized with numerous single-phase materials having been successfully made within the ternary. Many of these single-phase compositions demonstrate high performances, with the materials containing all of Ti, Nb and W outperforming the binary compositions. The highest room temperature discharge capacity of 315 mA h g−1, and capacity retentions of 97% after several weeks of cycling represent a significant advancement over the performance previously seen in the binary mixtures. Importantly, performances at 37 °C are outstanding with retentions as high as 98.9%, showing high promise for implantable devices given their good performance at body temperatures.

Graphical abstract: The Nb–Ti–W–O system as safe high-power anodes for Li-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
12 Oct 2023
Accepted
19 Dec 2023
First published
20 Dec 2023

J. Mater. Chem. A, 2024,12, 1429-1437

The Nb–Ti–W–O system as safe high-power anodes for Li-ion batteries

J. M. Sieffert, C. J. Lang, S. Bazylevych, S. Jia and E. McCalla, J. Mater. Chem. A, 2024, 12, 1429 DOI: 10.1039/D3TA06224D

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