We report a new Li–S cell concept based on an optimized F‐free catholyte solution and a high loading nanostructured C/S composite cathode. The Li₂S₈ present in the electrolyte ensures both buffering against active material dissolution and Li⁺ conduction. The high S loading is obtained by confining elemental S (≈80 %) in the pores of a highly ordered mesopores carbon (CMK3). With this concept we demonstrate stabilization of a high energy density and excellent cycling performance over 500 cycles. This Li–S cell has a specific capacity that reaches over 1000 mA h g⁻¹, with an overall S loading of 3.6 mg cm⁻² and low electrolyte volume (i.e., 10 μL cm⁻²), resulting in a practical energy density of 365 Wh kg⁻¹. The Li–S system proposed thus meets the requirements for large scale energy storage systems and is expected to be environmentally friendly and have lower cost compared with the commercial Li‐ion battery thanks to the removal of both Co and F from the overall formulation.

中文翻译：

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量身定制的无氟电解质和纳米结构S / C复合材料的低成本高能锂电池的合理设计

我们报告了基于优化的无氟阴极电解液解决方案和高负载纳米结构C / S复合阴极的新型Li–S电池概念。电解质中存在的Li ₂ S ₈既可防止活性物质溶解，又可确保Li ⁺传导。通过将元素S（≈80％）限制在高度有序的中孔碳（CMK3）的孔中来获得高的S负载。通过这一概念，我们证明了在500次循环中高能量密度的稳定和出色的循环性能。该Li–S电池的比容量达到1000 mA h g ^-1以上，总S负载为3.6 mg cm ^-2，电解质体积低（即10μLcm ^-2）），产生的实际能量密度为365 Wh kg ^-1。因此，提出的Li–S系统满足大规模储能系统的要求，并且由于从整体配方中去除了Co和F，与商用锂离子电池相比，有望实现环保且成本更低。