Practical applications of Li-S batteries are hindered by the dissolution/diffusion loss of sulfur-related active materials in cathode and dendrite growth in Li metal anode. Here we present an integrated sulfur cathode design on tortuosity and sulfur-binding affinity parameters for mitigating diffusion loss of sulfur-based active materials. The high sulfur-philicity property (from oxygen functional groups, 16% in concentration) in reduced graphene oxide (rGO) host favors bonding with sulfur species to mitigate their diffusion/dissolution loss, while the high tortuosity (13.24, from horizontal arrangement of rGO sheets) can localize the soluble active materials within the host rather than outward diffusion loss with subsequent uneven redeposition. With this integrated concept, we achieved ultrahigh cathode areal capacities of 21 mAh cm⁻² with 98.1% retention after 160 cycles, surpassing those electrodes with lower tortuosity and sulfur-philicity. In addition, same rGO host suppresses dendrite growth in Li anode, enabling 278% prolonged cycle life in the full cell.

锂相关活性物质在阴极中的溶解/扩散损失以及锂金属阳极中的枝晶生长阻碍了锂硫电池的实际应用。在这里，我们提出了关于曲折度和硫结合亲和力参数的集成硫阴极设计，以减轻硫基活性材料的扩散损失。还原的氧化石墨烯（rGO）主体具有高的亲硫性（来自氧官能团，浓度为16％），有利于与硫物质键合以减轻其扩散/溶解损失，而曲折度较高（13.24，来自rGO的水平排列）片）可以将可溶性活性物质定位在主体内，而不是向外扩散损失以及随后的不均匀再沉积。通过这种集成的概念，我们实现了21 mAh cm的超高阴极面积容量在160次循环后，^-2的保留率为98.1％，超过了那些曲折度和硫亲和性较低的电极。此外，相同的rGO宿主抑制了Li阳极中枝晶的生长，从而使全电池的循环寿命延长了278％。