Experimental and Theoretical Characteristic of Single Atom Co-N-C Catalyst for Li-O2 Batteries
Gaoyang Li, Congcong Dang, Yue Hou, Feng Dang, Yuqi Fan and Zhanhu Guo
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, 17923 Jingshi Road, Jinan, 250061, China
- School of Chemical Engineering, Graduate School of Biomedical Engineering and Australian Centre for Nano Medicine, University of New South Wales, Sydney, New South Wales, 2052, Australia
- Institute of Environment and Ecology, Shandong Normal University, Jinan, 250014, China
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
#These authors contributed to this work equally.
Abstract
Single atom Co-N-C can be used as low-cost cathode catalyst for Li-O2 batteries (LOBs) with abundant highly active sites and high efficient atom utilization. In the present work, hierarchical porous single atom Co-N-C catalyst was prepared through acid etching from a Co/Co-N-C intermediate, featuring efficient slack of volume expansion, easy mass transmission via interconnected carbon-framework, and sufficient surface area to accommodate discharge products. The single atom Co-N-C catalyst exhibited a superior catalytic capacity for LOBs with a large specific capacity of 14075 mAh g-1 anda long cycle life of 340 cycles. The oxygen reduction reaction (ORR) /oxygen evolution reaction (OER) mechanisms of discharge products of the single atom Co-N-C catalyst were identified by using density functional theory (DFT) calculations, showing avenues for improving the future design of single atom catalysts.
Publication details
Received: 21 Apr 2020
Revised: 07 May 2020
Accepted: 08 May 2020
Published online: 08 May 2020
Article type:
Research Paper
DOI:
10.30919/es8d1005
Volume:
10
Page:
85-94
Citation:
Engineered Science, 2020, 10, 85-94
Permissions:
Copyright
Number of downloads:
6447
Citation Information:
12
Description:
We characterized the single atom Co-N-C catalyst for Li-O2 batteries by experiment and theory and sh....
We characterized the single atom Co-N-C catalyst for Li-O2 batteries by experiment and theory and showed the avenues for improving their future design.
Supplementary Information:
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