PreprintArticleVersion 1This version is not peer-reviewed
Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries.
Version 1
: Received: 8 August 2024 / Approved: 8 August 2024 / Online: 9 August 2024 (12:09:52 CEST)
How to cite:
Castillo, I.; Tripathi, B.; Barrionuevo, D.; Mishra, K. K.; Morell, G.; S. Katiyar, R. Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries.. Preprints2024, 2024080648. https://doi.org/10.20944/preprints202408.0648.v1
Castillo, I.; Tripathi, B.; Barrionuevo, D.; Mishra, K. K.; Morell, G.; S. Katiyar, R. Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries.. Preprints 2024, 2024080648. https://doi.org/10.20944/preprints202408.0648.v1
Castillo, I.; Tripathi, B.; Barrionuevo, D.; Mishra, K. K.; Morell, G.; S. Katiyar, R. Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries.. Preprints2024, 2024080648. https://doi.org/10.20944/preprints202408.0648.v1
APA Style
Castillo, I., Tripathi, B., Barrionuevo, D., Mishra, K. K., Morell, G., & S. Katiyar, R. (2024). Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries.. Preprints. https://doi.org/10.20944/preprints202408.0648.v1
Chicago/Turabian Style
Castillo, I., Gerardo Morell and Ram S. Katiyar. 2024 "Enhancing Polysulfide Redox Kinetics Through Synergistic Polarization of Ferroelectric (Ba0.9Sr0.1TiO3) Nanoparticles for High-Capacity Li-S Batteries." Preprints. https://doi.org/10.20944/preprints202408.0648.v1
Abstract
We report on the role of synergistic polarization of Ba0.9Sr0.1TiO3 (BST) nanoparticles in sulfur cathodes to enhance the redox kinetics of polysulfides for high-capacity Li-S batteries. Ferroelectric nanoparticles are known to significantly improve the electrochemical performance of Li-S batteries due to their inherent self-polarization and high adsorption capacity towards polysulfides. X-ray diffraction spectra confirmed the tetragonal symmetry (c/a=1.0073), while Raman spectroscopic analysis validated the presence of tetragonal orientation Raman modes in BST-modified composites. Scanning electron microscope (SEM) images showed a homogeneous distribution of BST in the sulfur cathode system, with grain sizes ranging from 1 to 1.5 μm. Notably, the BST-coupled S50BST30CB10PVDF10 composite cathode achieved a capacity of approximately 820 mAh/g at 100 mA/g, maintaining stability over 100 cycles, demonstrating improved electrochemical performance. Two distinct plateaus between 2.3 V to 2.0 V and 2.0 V to 1.5 V further underscore the superior performance of BST ferroelectric nanoparticles in enhancing the redox kinetics of Li-S batteries. By leveraging the favourable affinity of polar substances towards polysulfides, we aimed to create a more stable reactive environment within the cathodic site, effectively trapping polysulfide intermediates through the synergistic polarization of BST nanoparticles. The synergistic polarization induced by the asymmetric crystal structure of ferroelectrics is anticipated to generate internal electric fields, enhancing chemisorption with heteropolar reactive. The observed high cyclic stability further validates the efficacy of these composite cathodes in mitigating the polysulfide shuttle effect, offering promising prospects for advancing Li-S battery technology.
Keywords
Li-S battery; C/S composite; BST coupling; polysulfide trapping; ferroelectric material
Subject
Chemistry and Materials Science, Physical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
