微型多孔材料
双功能
阳极
分离器(采油)
阴极
电池(电)
材料科学
锂(药物)
碳纤维
内阻
硫黄
锂硫电池
充电周期
化学工程
纳米技术
化学
复合材料
电极
有机化学
冶金
催化作用
物理化学
功率(物理)
内分泌学
工程类
物理
复合数
热力学
医学
量子力学
涓流充电
作者
Yu‐Sheng Su,Arumugam Manthiram
摘要
The limitations in the cathode capacity compared with that of the anode have been an impediment to advance the lithium-ion battery technology. The lithium-sulphur system is appealing in this regard, as sulphur exhibits an order of magnitude higher capacity than the currently used cathodes. However, low active material utilization and poor cycle life hinder the practicality of lithium-sulphur batteries. Here we report a simple adjustment to the traditional lithium-sulphur battery configuration to achieve high capacity with a long cycle life and rapid charge rate. With a bifunctional microporous carbon paper between the cathode and separator, we observe a significant improvement not only in the active material utilization but also in capacity retention, without involving complex synthesis or surface modification. The insertion of a microporous carbon interlayer decreases the internal charge transfer resistance and localizes the soluble polysulphide species, facilitating a commercially feasible means of fabricating the lithium-sulphur batteries.
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