Issue 22, 2013

SBA-15 confined synthesis of TiNb2O7 nanoparticles for lithium-ion batteries

Abstract

Unlike most conventional anode materials, the newly developed TiNb2O7 (TNO) does not form a solid electrolyte interface (SEI) layer, which makes it safe for high power requiring lithium-ion batteries. In this paper, we demonstrated an SBA-15 confined synthetic approach to prepare TNO nanoparticles (S-TNO) with a small particle size around 10 nm and a large BET surface area of 79.5 m2 g−1. It is worth mentioning that this is the smallest size reported so far for TNO. In contrast, the TNO (L-TNO) synthesized without SBA-15 has a particle size above 100 nm and a BET surface area of only 4.3 m2 g−1. The S-TNO shows better lithium-ion storage properties than L-TNO. The excellent electrochemical performance of S-TNO is attributed to its small crystalline size, which not only provides a larger effective area for better contact between the electrode material and the electrolyte, but also reduces the rate-limiting Li diffusion path. Moreover, S-TNO shows a high Coulombic efficiency (above 98% over 300 cycles) and negligible increase of impedance after cycling, which confirms no SEI layer formation in the operational voltage (1–3 V) of TNO.

Graphical abstract: SBA-15 confined synthesis of TiNb2O7 nanoparticles for lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
12 Jul 2013
Accepted
04 Sep 2013
First published
06 Sep 2013

Nanoscale, 2013,5, 11102-11107

SBA-15 confined synthesis of TiNb2O7 nanoparticles for lithium-ion batteries

L. Fei, Y. Xu, X. Wu, Y. Li, P. Xie, S. Deng, S. Smirnov and H. Luo, Nanoscale, 2013, 5, 11102 DOI: 10.1039/C3NR03594H

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