Issue 14, 2017

Capacity retention of lithium sulfur batteries enhanced with nano-sized TiO2-embedded polyethylene oxide

Abstract

The shuttle effect of polysulfides in Li/S batteries causes the loss of active materials and capacity decay. This phenomenon has retarded the practical application of Li/S batteries. Herein, we demonstrate that the undesired shuttle mechanism owing to dissolved lithium polysulfides can be effectively suppressed by the incorporation of TiO2 nanoparticles (NPs) within a solid nanocomposite polymer electrolyte of polyethylene oxide (PEO). The approach shows enhanced capacity retention, whereby a cell with a hybrid solid electrolyte of TiO2 NPs embedded in PEO has delivered more than 1450 mA h gāˆ’1 (first cycle discharge capacity) with āˆ¼87% capacity retention after 100 cycles, compared to only 38% capacity retention in the absence of TiO2. Density Functional Theory (DFT) computational results based on bonding interactions and Raman characterization of the different components reveal that the undesired diffusion shuttle mechanism causing Li anode passivation can be effectively reduced by the use of nano-sized TiO2 and polyethylene oxide.

Graphical abstract: Capacity retention of lithium sulfur batteries enhanced with nano-sized TiO2-embedded polyethylene oxide

Supplementary files

Article information

Article type
Paper
Submitted
14 Dec 2016
Accepted
15 Mar 2017
First published
15 Mar 2017

J. Mater. Chem. A, 2017,5, 6708-6715

Capacity retention of lithium sulfur batteries enhanced with nano-sized TiO2-embedded polyethylene oxide

F. Lee, M. Tsai, M. Lin, Y. L. Ni'mah, S. Hy, C. Kuo, J. Cheng, J. Rick, W. Su and B. Hwang, J. Mater. Chem. A, 2017, 5, 6708 DOI: 10.1039/C6TA10755A

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