Issue 37, 2024

Co-deposition of conductive additives and lithium peroxide during discharge to boost the performance of lithium–oxygen batteries

Abstract

Lithium–oxygen batteries (LOBs) have been regarded as a promising energy storage system for applications in electric vehicles and aviation. However, the development of high-performance LOBs has been hindered by the challenges associated with insulating discharge products, such as low energy efficiency and poor rate performance. Here, we report that insulating lithium peroxide (Li2O2) can deposit with a carbon nanotube (CNT) additive during the discharge process and eventually be woven into a conductive network. The constructed network enhances the conductivity of Li2O2 and accelerates the kinetics of electrode reactions. As a result, the battery containing 1.0 mg mL−1 CNTs in the electrolyte exhibits a high areal capacity of 5.7 mA h cm−2 and superior rate performance at 1.41 A gCNT−1. Furthermore, the introduction of ruthenium nanoparticles to the CNTs results in stable cycling for 550 hours. This research opens up a new avenue for addressing the issues caused by insulating discharge products in LOBs.

Graphical abstract: Co-deposition of conductive additives and lithium peroxide during discharge to boost the performance of lithium–oxygen batteries

Supplementary files

Article information

Article type
Paper
Submitted
12 jun 2024
Accepted
29 jul 2024
First published
07 aug 2024

J. Mater. Chem. A, 2024,12, 24977-24982

Co-deposition of conductive additives and lithium peroxide during discharge to boost the performance of lithium–oxygen batteries

Y. Liang, Y. Yu, Z. Li, J. Wang, J. Yan, G. Huang and X. Zhang, J. Mater. Chem. A, 2024, 12, 24977 DOI: 10.1039/D4TA04077E

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