biostudies-literatureHeo JMinistry of Trade, Industry and EnergyKorea Electrotechnology Research InstituteNational Research Foundation of Korea, Korea GovernmentNational Research Council of Science & Technology, Korea governmente2406536https://www.ebi.ac.uk/biostudies/studies/S-EPMC11775554biostudies-literatureUnknown12(4)Lithium-sulfur (Li-S) batteries represent a promising solution for achieving high energy densities exceeding 500 Wh kg^-1, leveraging cathode materials with theoretical energy densities up to 2600 Wh kg^-1. These batteries are also cost-effective, abundant, and environment-friendly. In this study, an innovative approach is proposed utilizing highly oxidized single-walled carbon nanotubes (Ox-SWCNTs) as a conductive fibrous scaffold and functional interlayer in sulfur cathodes and separators, respectively, to demonstrate large-area and ultra-flexible Li-S batteries with enhanced energy density. The free-standing sulfur cathodes in the Li-S cells exhibit high energy density maintaining 806 mAh g^-1 even after 100 charge-discharge cycles. Additionally, oxygen-conAdvanced science (Weinheim, Baden-Wurttemberg, Germany)A Promising Approach to Ultra-Flexible 1 Ah Lithium-Sulfur Batteries Using Oxygen-Functionalized Single-Walled Carbon Nanotubes.PMC117755542001458124A010052021R1I1A3060334202154101000302020R1A4A1019463GTL24011-000Kim DHKim DBaeg KJSung JHong JWKang SLee YJHan JTPark JWChoi HYHeo JKim JHGu HWfalseA Promising Approach to Ultra-Flexible 1 Ah Lithium-Sulfur Batteries Using Oxygen-Functionalized Single-Walled Carbon Nanotubes.Lithium-sulfur (Li-S) batteries represent a promising solution for achieving high energy densities exceeding 500 Wh kg^-1, leveraging cathode materials with theoretical energy densities up to 2600 Wh kg^-1. These batteries are also cost-effective, abundant, and environment-friendly. In this study, an innovative approach is proposed utilizing highly oxidized single-walled carbon nanotubes (Ox-SWCNTs) as a conductive fibrous scaffold and functional interlayer in sulfur cathodes and separators, respectively, to demonstrate large-area and ultra-flexible Li-S batteries with enhanced energy density. The free-standing sulfur cathodes in the Li-S cells exhibit high energy density maintaining 806 mAh g^-1 even after 100 charge-discharge cycles. Additionally, oxygen-con2025-01-01T00:00:00Z2025 Jan2025-04-25T18:48:59.788Z2025-04-06T07:46:19.688ZS-EPMC117755543962989910.1002/advs.202406536