Issue 21, 2018

A single ion conducting separator and dual mediator-based electrolyte for high-performance lithium–oxygen batteries with non-carbon cathodes

Abstract

The application of non-carbon cathodes for mitigating side reactions in lithium–oxygen batteries faces the critical disadvantages of significantly reduced discharge capacity and unsatisfactory charge potential. Here, we break through these bottlenecks by introducing two synergistic redox mediators (RMs) into an electrolyte for lithium peroxide formation and reversible oxidation, and more importantly, by developing a single ion conducting Li+-Nafion separator to prohibit RM crossover towards the Li metal anode. The self-discharge and shuttle problems are avoided. The discharge capacity of the commercial ruthenium oxide-based non-carbon cathode can be greatly enhanced from 800 mA h g−1 to 3800 mA h g−1. The charge potential can be significantly reduced to 3.2 V, which is among the best levels reported. During the long-term cycling, the battery maintains a low charge overpotential of 0.24 V, indicating high stability. This first synergistic concept of designing RMs and a Li+-Nafion separator for advanced non-carbon lithium–oxygen batteries shows great potential for developing practical batteries with high capacity, energy efficiency and rechargeability.

Graphical abstract: A single ion conducting separator and dual mediator-based electrolyte for high-performance lithium–oxygen batteries with non-carbon cathodes

Supplementary files

Article information

Article type
Communication
Submitted
20 ማርች 2018
Accepted
30 ኤፕሪ 2018
First published
03 ሜይ 2018

J. Mater. Chem. A, 2018,6, 9816-9822

Author version available

A single ion conducting separator and dual mediator-based electrolyte for high-performance lithium–oxygen batteries with non-carbon cathodes

S. Wu, Y. Qiao, H. Deng and H. Zhou, J. Mater. Chem. A, 2018, 6, 9816 DOI: 10.1039/C8TA02567C

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