Issue 6, 2022

Co3O4 nanoparticle-dotted hierarchical-assembled carbon nanosheet framework catalysts with the formation/decomposition mechanisms of Li2O2 for smart lithium–oxygen batteries

Abstract

Li-O2 batteries (LOBs) have been regarded as promising candidates for the next generation of electric vehicles owing to their excellent energy density. Nevertheless, the practical application of LOBs with a sensible cathode material has largely been blocked due to their low-activity catalysts and inefficient product evolution. Combining carbon and metal oxide is one of the most effective strategies to realize the high capacity and lower overpotential for boosting the Li-O2 battery performance. Herein, cobalt oxide (Co3O4) nanoparticle-dotted hierarchical-assembled carbon nanosheet frameworks (Co3O4-HCNFs) were fabricated using a facile two-step carbonization-calcined route and applied as high-efficiency electrochemical catalysts for Li-O2 batteries. Co3O4 has been proved to be effective for the full composition/decomposition of generated Li2O2 thin films during the oxygen reduction reaction process (ORR) and the oxygen evolution reaction process (OER). Furthermore, the cobalt oxide nanoparticle-dotted hierarchical-assembled carbon nanosheet frameworks satisfy the relevant requirements including controlled morphology and efficient volume change accommodation, which delivered a high-performance with a large specific capacity of 14 949 mA h g−1 and superior cycling stability with 180 cycles. This study designs a smart strategy with high-performance Co3O4 cathodes for Li-O2 batteries and the composition/decomposition mechanisms of Li2O2 films, showing a favorable method for recomposing the future design of Co3O4-based advanced energy materials.

Graphical abstract: Co3O4 nanoparticle-dotted hierarchical-assembled carbon nanosheet framework catalysts with the formation/decomposition mechanisms of Li2O2 for smart lithium–oxygen batteries

Supplementary files

Article information

Article type
Research Article
Submitted
06 okt 2021
Accepted
28 jan 2022
First published
28 jan 2022

Inorg. Chem. Front., 2022,9, 1115-1124

Co3O4 nanoparticle-dotted hierarchical-assembled carbon nanosheet framework catalysts with the formation/decomposition mechanisms of Li2O2 for smart lithium–oxygen batteries

Y. Zhai, W. Yang, X. Xie, X. Sun, J. Wang, X. Yang, N. Naik, H. Kimura, W. Du, Z. Guo and C. Hou, Inorg. Chem. Front., 2022, 9, 1115 DOI: 10.1039/D1QI01260F

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