JAPC  >> Vol. 6 No. 2 (May 2017)

    Supercritical CO2 Deposition of Cathode Materials for Lithium-Sulfur Battery

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赵俊俊,朱 允,孔丽萍,王呈呈,叶向荣:浙江师范大学物理化学研究所,先进催化材料教育部重点实验室,浙江 金华;
巩飞龙:郑州轻工业学院,材料与化学工程学院,河南 郑州

超临界二氧化碳活性炭正极材料锂硫电池Supercritical CO2 Sulfur Activated Carbon Cathode Material Li-S Batteries



On account of its surpassing theoretical specific capacity (1675mAh/g) and energy density (2600wh/Kg), lithium-sulfur (Li-S) battery has attracted extensive attention nowadays. However, its practical application is hindered by the electric insulativity of sulfur and Li2S as well as the well-known shuttle effect. In this work, a novel method, supercritical CO2(SCCO2) assisted precipitation, is reported to load sulfur onto commercial activated carbon (QR1500) as cathode material of Li-S battery, which exhibits improved cycling performance. SCCO2 provides low viscosity, low surface tension and high diffusivity like gas as well as appreciable density and solvation power like liquid, enabling uniform dispersion of sulfur into porous QR1500 and intimate contact of sulfur with carbon. As cathode materials of Li-S battery, the resultant composite gives rise to an initial discharge capacity of 810mAh/g at 0.5˚C, which is higher than that of 139mAh/g for its counterpart prepared by traditional melting infiltration. Furthermore, 55% of capacity was preserved after 150 cycles.

赵俊俊, 朱允, 孔丽萍, 王呈呈, 巩飞龙, 叶向荣. 活性炭载硫材料的超临界二氧化碳制备及在锂硫电池中的应用[J]. 物理化学进展, 2017, 6(2): 52-59. https://doi.org/10.12677/JAPC.2017.62007


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