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BiFeO 3 Coupled Polysulfide Trapping in C/S Composite Cathode Material for Li-S Batteries as Large Efficiency and High Rate Performance

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  • Balram Tripathi

    (Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA
    Department of Physics, S. S. Jain Subodh P.G. (Autonomous) College, Jaipur 302004, India)

  • Rajesh K. Katiyar

    (Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA)

  • Gerardo Morell

    (Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA)

  • Ambesh Dixit

    (Department of Physics, Indian Institute of Technology, Jodhpur 342037, India)

  • Ram S. Katiyar

    (Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA)

Abstract

We demonstrated the efficient coupling of BiFeO 3 (BFO) ferroelectric material within the carbon–sulfur (C-S) composite cathode, where polysulfides are trapped in BFO mesh, reducing the polysulfide shuttle impact, and thus resulting in an improved cyclic performance and an increase in capacity in Li-S batteries. Here, the built-in internal field due to BFO enhances polysulfide trapping. The observation of a difference in the diffusion behavior of polysulfides in BFO-coupled composites suggests more efficient trapping in BFO-modified C-S electrodes compared to pristine C-S composite cathodes. The X-ray diffraction results of BFO–C-S composite cathodes show an orthorhombic structure, while Raman spectra substantiate efficient coupling of BFO in C-S composites, in agreement with SEM images, showing the interconnected network of submicron-size sulfur composites. Two plateaus were observed at 1.75 V and 2.1 V in the charge/discharge characteristics of BFO–C-S composite cathodes. The observed capacity of ~1600 mAh g −1 in a 1.5–2.5 V operating window for BFO 30 -C 10 -S 60 composite cathodes, and the high cyclic stability substantiate the superior performance of the designed cathode materials due to the efficient reduction in the polysulfide shuttle effect in these composite cathodes.

Suggested Citation

  • Balram Tripathi & Rajesh K. Katiyar & Gerardo Morell & Ambesh Dixit & Ram S. Katiyar, 2021. "BiFeO 3 Coupled Polysulfide Trapping in C/S Composite Cathode Material for Li-S Batteries as Large Efficiency and High Rate Performance," Energies, MDPI, vol. 14(24), pages 1-9, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8362-:d:700332
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    References listed on IDEAS

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    1. Liumin Suo & Yong-Sheng Hu & Hong Li & Michel Armand & Liquan Chen, 2013. "A new class of Solvent-in-Salt electrolyte for high-energy rechargeable metallic lithium batteries," Nature Communications, Nature, vol. 4(1), pages 1-9, June.
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