In the pursuit of high-energy-density batteries, there is tremendous appetite for developing the lithium-sulfur technology with high sulfur loading and content while keeping the electrolyte/sulfur (E/S) ratio low to be competitive with or surpass the current lithium-ion technology. However, very limited studies have focused on keeping these parameters at practically desirable ranges. Here, we present a lithium-sulfur cell with a coaxial-graphene-coated cotton-carbon (CGCC) cathode that displays excellent performance with high sulfur loading (57.6 mg cm⁻²), high sulfur content (75 wt %), and low E/S ratio (4.2 μL mg⁻¹) simultaneously. The cell exhibits high areal capacity (31 mA hr cm⁻²) and areal energy density (66 mW hr cm⁻²) that exceed the areal capacity (4 mA hr cm⁻²) and areal energy density (10 mW hr cm⁻²) of a commercial LiCoO₂ cathode with a high capacity-retention rate of 68% over 200 cycles.

在追求高能量密度电池方面，发展具有高硫负载量和高含量同时保持较低的电解质/硫（E / S）比值以与现有锂竞争或超越的锂硫技术具有极大的胃口。离子技术。然而，非常有限的研究集中在将这些参数保持在实际期望的范围内。在这里，我们提出了一种锂硫电池，带有同轴石墨烯涂层的棉碳（CGCC）阴极，在高硫负荷（57.6 mg cm ^-2），高硫含量（75 wt％）和低硫含量下表现出优异的性能E / S比（4.2μLmg ^-1）同时。该电池展现出高的面容量（31 mA hr cm ^-2）和面能量密度（66 mW hr cm ^-2）超过了商用LiCoO ₂阴极的面容量（4 mA hr cm ^-2）和面能量密度（10 mW hr cm ^-2），在200个循环中具有68％的高容量保持率。