High-power high-density lithium rechargeable batteries are necessary to meet the energy demand of electric vehicles and high-power stationary grids. Here, we present a straightforward method for obtaining carbon nanofibers (CNFs) as a polysulfide barrier in Li-S cells, resulting in a significant increase in cell performance. CNFs were coated both on the separator and on the cathode. The CNF-coated cathode showed a specific capacity of 1010 mA h g⁻¹ after 250 cycles at 0.2 C, with a capacity fading of 0.021% per cycle. In addition, at 1 C, it delivered 946 mA h g⁻¹, thus presenting a fast Li⁺ transport with a good capacity. This result turns CNFs-coated cathodes into a promising system for obtaining high-performance Li-S cells.

为了满足电动汽车和大功率固定电网的能源需求，必须使用大功率高密度锂可充电电池。在这里，我们提出了一种简单的方法来获得碳纳米纤维（CNF）作为Li-S电池中的多硫化物阻挡层，从而显着提高电池性能。CNF既涂覆在隔板上，又涂覆在阴极上。经CNF涂覆的阴极在0.2 C下经过250次循环后显示出1010 mA h g ^-1的比容量，每循环0.021％的容量衰减。另外，在1 C时，它的传递能力为946 mA h g ^-1，因此呈现出具有良好容量的快速Li ⁺传输。这一结果使涂有CNF的阴极成为获得高性能Li-S电池的有前途的系统。