Issue 1, 2021

Sustainable S cathodes with synergic electrocatalysis for room-temperature Na–S batteries

Abstract

A novel sulfiphilic host is reported with single Co atoms (Co1) and ZnS quantum dots (ZnS-QDs) (∼10 nm) grown in N-doped carbon microparticles. The introduction of Co cations into the precursor is crucial, because it leads to the dispersion of single-atom Co on the carbon matrix, decreasing the size and improving the dispersion of the resultant ZnS-QDs as well. Benefitting from the resilient and stable carbon framework, the single-atom Co and small ZnS-QDs synergically electro-catalyze the S redox process, which can greatly enhance sodium polysulfide conversion and reduction of non-conductive Na2S. The refined S cathode achieves remarkable cycling capability (640 mA h g−1 after 500 cycles at 0.1 A g−1), enhanced capacity retention, and outstanding energy density (541 W h kg−1), giving it great promise for scientific research and practical applications.

Graphical abstract: Sustainable S cathodes with synergic electrocatalysis for room-temperature Na–S batteries

Supplementary files

Article information

Article type
Paper
Submitted
05 септ. 2020
Accepted
19 ноем. 2020
First published
20 ноем. 2020

J. Mater. Chem. A, 2021,9, 566-574

Sustainable S cathodes with synergic electrocatalysis for room-temperature Na–S batteries

H. Liu, W. Lai, Y. Liang, X. Liang, Z. Yan, H. Yang, Y. Lei, P. Wei, S. Zhou, Q. Gu, S. Chou, H. K. Liu, S. X. Dou and Y. Wang, J. Mater. Chem. A, 2021, 9, 566 DOI: 10.1039/D0TA08748C

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