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| 1 | 高性能锂硫电池用钴/碳复合材料硫宿主显示文摘锂硫电池由于具有较高的能量密度而被认为是极具发展前景的储能设备之一。然而,硫正极遭遇迟缓的反应动力学、缓慢的电荷转移、大的体积膨胀、严重的多硫化锂穿梭效应,这些问题不可避免地导致锂硫电池表现出低的可逆容量、差的倍率性能、短的循环寿命,限制了锂硫电池的实际应用。本文总结了钴/碳复合材料(包括钴纳米颗粒和钴单原子)作为硫宿主的研究进展。总的来说,钴扮演着电催化剂的角色,能够抑制多硫化锂的穿梭效应,加快电化学反应动力学,促进离子/电子转移以及缓解体积膨胀。同时,我们展望了钴/碳复合材料作为锂硫电池硫宿主的发展前景。本工作可为钴/碳复合材料作为锂硫电池硫宿主提供完整的蓝图和建设性的建议,同时这些策略也可用于其他金属-硫电池。 | 杨云锐 董欢欢 郝志强 何祥喜 杨卓 李林 侴术雷 | 2023 | 电化学2023，29，4： | 0 |
| 2 | Cobalt-embedded 3D conductive honeycomb architecture to enable high-sulphur-loading Li-S batteries under lean electrolyte conditions显示文摘High sulphur loading and lean electrolyte conditions are important to achieve the high theoretical energy density of lithiumsulphur(Li-S)batteries.However,serious problems such as low sulphur utilization and fast capacity fade are typically experienced under low electrolyte/sulphur(E/S)ratios and high sulphur loading conditions.To address these issues,a cobaltcontaining three-dimensional conductive honeycomb(Co@N-HPC)is proposed in this work as a material for sulphur cathodes.The good electrical conductivity and high density of catalytic sites of(Co@N-HPC)allow fast redox kinetics of lithium polysulfide(LiPS)in high-sulphur-loading electrodes.In addition,the hierarchical structure and good wettability by the electrolyte of Co@NHPC facilitates electrolyte penetration and LiPS conversion,leading to a high utilization of sulphur under lean electrolyte conditions.Therefore,at a current density of 0.2 C,a volumetric capacity of 1,410 mAh·cm^(−3)was attained with a sulphur loading of 5.1 mg·cm^(−2)and an E/S ratio of 5μL·mg^(−1).This work provides ideas for the development of lean electrolyte Li-S batteries with a high sulphur loading. | Hui Pan Zhibin Cheng Jan Fransaer Jiangshui Luo Michael Wübbenhorst | 2022 | Nano Research2022，15，9： | 0 |
| 3 | Carbon-Nitride-Based Materials for Advanced Lithium-Sulfur Batteries显示文摘Lithium-sulfur(Li-S)batteries are promising candidates for next-generation energy storage systems owing to their high energy density and low cost.However,critical challenges including severe shuttling of lithium polysulfides(LiPSs)and sluggish redox kinetics limit the practical application of Li-S batteries.Carbon nitrides(C_(x)N_(y)),represented by graphitic carbon nitride(g-C_(3)N_(4)),provide new opportunities for overcoming these challenges.With a graphene-like structure and high pyridinic-N content,g-C_(3)N_(4) can effectively immobilize LiPSs and enhance the redox kinetics of S species.In addition,its structure and properties including electronic conductivity and catalytic activity can be regulated by simple methods that facilitate its application in Li-S batteries.Here,the recent progress of applying C_(x)N_(y)-based materials including the optimized g-C_(3)N_(4),g-C_(3)N_(4)-based composites,and other novel C_(x)N_(y) materials is systematically reviewed in Li-S batteries,with a focus on the structure-activity relationship.The limitations of existing C_(x)N_(y)-based materials are identified,and the perspectives on the rational design of advanced C_(x)N_(y)-based materials are provided for high-performance Li-S batteries. | Wenhao Sun Zihao Song Zhenxing Feng Yaqin Huang Zhichuan J.Xu Yi-Chun Lu Qingli Zou | 2022 | Nano-Micro Letters2022，14，12： | 0 |
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