According to a statistic,approximately 6 trillion cigarettes are smoked each year all over the world,which produces approximately 1.2 million tons of discarded cigarette butts.The discarded cigarette filters are non-biodegradable,thus they produce a mass of waste disposal and cause environmental pollution is-sue.For the purpose of transforming waste into wealth and reducing environmental pollution,nitrogen and sulfur co-doped carbon nanofiber/carbon black(N,S-CNF/CB)composite derived from the discarded cigarette filters is employed to modify glass fiber(GF)separator for the first time in this study.N,S-CNF improves binding ability towards sodium polysulfides(SPSs)by chemisorption.Non-polar CB limits the dissolution of SPSs in the liquid electrolyte by physisorption.The experiment and density functional theory calculation results indicate that a RT-Na/S battery with a N,S-CNF/CB+GF separator exhibits good cycling stability and rate performance.After 100 cycles at a low current rate of 0.1 C,a RT-Na/S battery with a sulfur mass fraction of 71％delivers a discharge capacity of 703 mAh g-1.In addition,at a high current rate of 0.5 C,a discharge capacity of 527 mAh g-1 is still maintained after 900 cycles with a very low capacity fading rate of 0.035％per cycle.

Chunwei Dong;Hongyu Zhou;Hui Liu;Bo Jin;Zi Wen;Xingyou Lang;Jianchen Li;Jaekwang Kim;Qing Jiang

Key Laboratory of Automobile Materials,Ministry of Education,and School of Materials Science and Engineering,Jilin University,Changchun 130022,China;Department of Energy Convergence Engineering,Cheongju University,298 Daeseong-ro,Cheongwon-gu,Cheongju,Chungbuk,363-764,Korea

材料科学技术（英文版）

[1]Chunwei Dong;Hongyu Zhou;Hui Liu;Bo Jin;Zi Wen;Xingyou Lang;Jianchen Li;Jaekwang Kim;Qing Jiang-.Inhibited shuttle effect by functional separator for room-temperature sodium-sulfur batteries)[J].材料科学技术（英文版）,2022(18):207-216

butts,SPSs,CB+GF

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