Microwave-assisted synthesis of a manganese metal–organic framework and its transformation to porous MnO/carbon nanocomposite utilized as a shuttle suppressing layer in lithium–sulfur batteries

Skoda, David;Kazda, Tomas;Munster, Lukas;Hanulikova, Barbora;Kuritka, Ivo;et.al.
(2019) Journal of Materials Science — Vol. 54, n° 22, p. 14102-14122 (2019)

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Authors
  • Skoda, Davidorcid-logo
    Author
  • Kazda, Tomasorcid-logo
    Author
  • Munster, Lukasorcid-logo
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  • Hanulikova, Barboraorcid-logo
    Author
  • Styskalik, Alesorcid-logoUCLouvain
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  • Eloy, Pierreorcid-logoUCLouvain
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  • Debecker, Damienorcid-logoUCLouvain
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  • Kuritka, Ivoorcid-logo
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Abstract
In this work, the microwave-assisted synthesis of manganese metal–organic framework (MOF) material is presented. Synthesis procedure is based on a microwave-assisted solvothermal reaction of manganese(III) acetylacetonate with biphenyl-4,4′-dicarboxylic acid (Bpdc) in N,N′-dimethylformamide at the temperature of 160 °C. The obtained Mn-based metal–organic framework, labeled as Mn-Bpdc, was used as a precursor for the preparation of a porous MnO/carbon nanocomposite, which was obtained via thermal transformation in a nitrogen atmosphere at 700 °C. It was found that this approach provides an effective and simple preparation pathway for porous carbon decorated with homogeneously embedded manganese(II) oxide nanoparticles. Both Mn-Bpdc and MnO/C nanocomposite materials were characterized by a variety of physicochemical methods. The prepared MnO/C nanocomposite material was deposited on a cathode surface of lithium-sulfur batteries and utilized as a shuttle suppressing layer. This electrode structure immobilizes polysulfides inside the cathode and improves the stability during cycling. The electrode with MnO/C nanocomposite shuttle suppressing layer maintains high stability during cycling in comparison with a standard electrode. The electrode with MnO/C composite layer exhibits 84.8% capacity retention after 50 cycles at different C-rates compared to 76.2% obtained for the standard electrode.
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Skoda, D., Kazda, T., Munster, L., Hanulikova, B., Styskalik, A., Eloy, P., Debecker, D., Vyroubal, P., Simonikova, L., & Kuritka, I. (2019). Microwave-assisted synthesis of a manganese metal–organic framework and its transformation to porous MnO/carbon nanocomposite utilized as a shuttle suppressing layer in lithium–sulfur batteries. Journal of Materials Science, 54(22), 14102-14122. https://doi.org/10.1007/s10853-019-03871-4 (Original work published 2019)