Stable immobilization of lithium polysulfides using three-dimensional ordered mesoporous Mn_(2)O_(3) as the host material in lithium-sulfur batteries
作者机构：Department of Energy ScienceSungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea Department of Energy EngineeringKonkuk UniversitySeoulRepublic of Korea Advanced Batteries Research CenterKorea Electronic Technology InstituteSeongnamRepublic of Korea Department of Future Energy EngineeringSungkyunkwan UniversitySuwonRepublic of Korea Department of Energy Systems EngineeringChung-Ang UniversitySeoulRepublic of Korea SKKU Advanced Institute of NanotechnologySungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST)Sungkyunkwan UniversitySuwonRepublic of Korea School of Advanced Materials Science and EngineeringSungkyunkwan UniversitySuwonRepublic of Korea
出 版 物：《Carbon Energy》 (碳能源（英文）)
年 卷 期：2024年第6卷第6期
页 面：99-112页
核心收录：
基 金：Ministry of Trade,Industry and Energy,Grant/Award Number:20010095 Korea Evaluation Institute of Industrial Technology,Grant/Award Number:20012341
主 题：host material lithium-sulfur battery ordered mesoporous structure shuttle effect transition-metal oxides
摘 要：Lithium-sulfur batteries(LSBs)have drawn significant attention owing to their high theoretical discharge capacity and energy ***,the dissolution of long-chain polysulfides into the electrolyte during the charge and discharge process(“shuttle effect)results in fast capacity fading and inferior electrochemical *** this study,Mn_(2)O_(3)with an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cathode host for LSBs via KIT-6 hard templating,to effectively inhibit the polysulfide shuttle ***-Mn_(2)O_(3)offers numerous pores to confine sulfur and tightly anchor the dissolved polysulfides through the combined effects of strong polar-polar interactions,polysulfides,and sulfur chain *** OM-Mn_(2)O_(3)/S composite electrode delivered a discharge capacity of 561 mAh g^(-1) after 250 cycles at 0.5 C owing to the excellent performance of OM-Mn_(2)O_(3).Furthermore,it retained a discharge capacity of 628mA h g^(-1) even at a rate of 2 C,which was significantly higher than that of a pristine sulfur electrode(206mA h g^(-1)).These findings provide a prospective strategy for designing cathode materials for high-performance LSBs.
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