Issue 23, 2016

On the electrochemical encounter between sodium and mesoporous anatase TiO2 as a Na-ion electrode

Abstract

Mesoporous anatase titanium dioxide (TiO2) is prepared by an easily up-scalable synthesis protocol, using relatively inexpensive precursors. We demonstrate here that submicronic anatase TiO2 crystals show unexpected performances as electrodes of Na-ion batteries (NaBs). They exhibit highly stable reversible specific capacities of up to 200 mA h g−1 and excellent cyclability at moderate current rates at an average potential of 1.0 V vs. Na+/Na. While pseudocapacitance may appear to be the main process driving the reactions between the sodium ions and TiO2 during the first discharge above 1 V vs. Na+/Na, operando Raman and X-ray diffraction studies show that the TiO2 anatase structure is nearly entirely lost below 0.25 V vs. Na+/Na. The subsequent cycling is based on amorphous sodium titanate materials.

Graphical abstract: On the electrochemical encounter between sodium and mesoporous anatase TiO2 as a Na-ion electrode

Supplementary files

Article information

Article type
Paper
Submitted
31 des 2015
Accepted
13 apr 2016
First published
03 mai 2016

CrystEngComm, 2016,18, 4431-4437

On the electrochemical encounter between sodium and mesoporous anatase TiO2 as a Na-ion electrode

N. Louvain, A. Henry, L. Daenens, B. Boury, L. Stievano and L. Monconduit, CrystEngComm, 2016, 18, 4431 DOI: 10.1039/C5CE02598B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements