Zhang Han, Zhang Mengtian, Liu Ruiyi, He Tengfeng, Xiang Luoxing, Wu Xinru, Piao Zhihong, Jia Yeyang, Zhang Chongyin, Li Hong, Xu Fugui, Zhou Guangmin, Mai Yiyong
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Nat Commun. 2024 Jun 27;15(1):5451. doi: 10.1038/s41467-024-49826-5.
Shuttling of lithium polysulfides and slow redox kinetics seriously limit the rate and cycling performance of lithium-sulfur batteries. In this study, FeO-dopped carbon cubosomes with a plumber's nightmare structure (SP-FeO-C) are prepared as sulfur hosts to construct cathodes with high rate capability and long cycling life for Li-S batteries. Their three-dimensional continuous mesochannels and carbon frameworks, along with the uniformly distributed FeO particles, enable smooth mass/electron transport, strong polysulfides capture capability, and fast catalytic conversion of the sulfur species. Impressively, the SP-FeO-C cathode exhibits top-level comprehensive performance, with high specific capacity (1303.4 mAh g at 0.2 C), high rate capability (691.8 mAh gFeO at 5 C), and long cycling life (over 1200 cycles). This study demonstrates a unique structure for high-performance Li-S batteries and opens a distinctive avenue for developing multifunctional electrode materials for next-generation energy storage devices.
多硫化锂的穿梭效应和缓慢的氧化还原动力学严重限制了锂硫电池的速率和循环性能。在本研究中，制备了具有管道工噩梦结构的FeO掺杂碳立方八面体（SP-FeO-C）作为硫宿主，以构建具有高倍率性能和长循环寿命的锂硫电池正极。它们的三维连续介孔通道和碳骨架，以及均匀分布的FeO颗粒，实现了顺畅的质量/电子传输、强大的多硫化物捕获能力以及硫物种的快速催化转化。令人印象深刻的是，SP-FeO-C正极表现出顶级的综合性能，具有高比容量（0.2C时为1303.4 mAh g）、高倍率性能（5C时为691.8 mAh gFeO）和长循环寿命（超过1200次循环）。本研究展示了一种用于高性能锂硫电池的独特结构，并为开发下一代储能装置的多功能电极材料开辟了一条独特的途径。
