Citation

Kiai, Maryam Sadat and Aslfattahi, Navid and Karatas, Deniz and Baydogan, Nilgun and Samylingam, Lingenthiran and Kadirgama, Kumaran and Kok, Chee Kuang (2025) The Development and Experimental Analysis of Freestanding Single‐Walled Carbon Nanotube/Sulfur Composite Cathode for the Next Generation of Sulfur‐Based Batteries. Energy Technology. ISSN 2194-4288

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Abstract

This work uses a solution‐based and scalable method to provide a freestanding single‐walled carbon nanotube (SWCNT)/S cathode in both LiS and NaS batteries. SWCNTs with high conductivity and surface area can enhance the cathode flexibility. The incorporation of oxygen and sulfur bonds can enhance active redox sites for chemical adsorption. Sulfur and oxygen effectively hinder the shuttle effect by improving chemical interactions between the polysulfides and the nonpolar carbon framework, leading to improved cyclability of NaS and LiS cells. The cycling stability plots of NaS and LiS batteries with freestanding SWCNT/S as a cathode are investigated for 150 cycles at a high current density of 1000 mA g⁻¹. Both cells display a stable capacity behavior during cycling. The discharge capacity of the LiS cell with the SWCNT/S cathode is retained at 978.2 mAh g⁻¹ while the NaS cell only shows the capacity retention of 769.4 mAh g⁻¹ after 150 cycles. Coulombic efficiencies of ≈94% and 90% are observed for LiS and NaS cells respectively. Therefore, the SWCNT/S cathode in both LiS and NaS batteries hinders the polysulfide shuttle, providing high electrolyte diffusion, resulting in improved active material reutilization and minimized capacity fading. Freestanding SWCNT/S cathode can enhance cycling stability over long‐term cycling and is proved to be a promising cathode in both LiS and NaS batteries.

Item Type:	Article
Uncontrolled Keywords:	Carbon nanotube/ sulfur
Subjects:	Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry T Technology > TN Mining engineering. Metallurgy > TN263-271 Mineral deposits. Metallic ore deposits. Prospecting
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	10 Apr 2025 03:27
Last Modified:	10 Apr 2025 03:27
URII:	http://shdl.mmu.edu.my/id/eprint/13681

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