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

Journal Article


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. This journal is

Publication Date


  • 2021

Citation


  • Liu, H., Lai, W. H., Liang, Y., Liang, X., Yan, Z. C., Yang, H. L., . . . Wang, Y. X. (2021). Sustainable S cathodes with synergic electrocatalysis for room-temperature Na-S batteries. Journal of Materials Chemistry A, 9(1), 566-574. doi:10.1039/d0ta08748c

Scopus Eid


  • 2-s2.0-85099130163

Start Page


  • 566

End Page


  • 574

Volume


  • 9

Issue


  • 1

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. This journal is

Publication Date


  • 2021

Citation


  • Liu, H., Lai, W. H., Liang, Y., Liang, X., Yan, Z. C., Yang, H. L., . . . Wang, Y. X. (2021). Sustainable S cathodes with synergic electrocatalysis for room-temperature Na-S batteries. Journal of Materials Chemistry A, 9(1), 566-574. doi:10.1039/d0ta08748c

Scopus Eid


  • 2-s2.0-85099130163

Start Page


  • 566

End Page


  • 574

Volume


  • 9

Issue


  • 1