Flexible batteries have become an indispensable component of emerging devices, such as wearable, foldable electronics and sensors. Although various flexible batteries have been explored based on one-dimensional and two-dimensional platforms, developing a high energy density electrode with high structural integrity remains challenging. Herein, a scalable, one-pot wet spinning strategy is used to synthesize a flexible porous cathode for lithium–sulfur batteries (LSBs) for the first time, which consists of reduced graphene oxide (rGO), graphene crumples (GCs) and sulfur powders. The electrode structures are tailored using GCs with different dimensions and functional features that are critical to its robustness under mechanical deformation and electrolyte penetration into the battery components. The optimized rGO/GC/S composite ribbon cathodes deliver a high capacity of 524 mA h g⁻¹ after 100 cycles at a current rate of 0.2 C. A shape-conformable battery prototype comprising an rGO/GC/S cathode and a lithium anode demonstrates a stable discharge characteristic under repeated bending/flattening cycles. The LSB prototype supported by an elastomer presents stable discharge behavior with high mechanical robustness against an extension of up to 50%. The above-mentioned findings shed new light on developing sulfur cathodes for flexible, high performance LSBs based on the rational design of graphene structures.

中文翻译：

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用于柔性锂硫电池的高导电性多孔石墨烯/硫复合带状电极†

柔性电池已成为新兴设备（如可穿戴，可折叠电子设备和传感器）不可或缺的组件。尽管已经基于一维和二维平台探索了各种柔性电池，但是开发具有高结构完整性的高能量密度电极仍然具有挑战性。本文首次采用可扩展的单锅湿法纺丝策略合成了用于锂硫电池（LSB）的柔性多孔阴极，该阴极由还原型氧化石墨烯（rGO），石墨烯皱褶（GCs）和硫粉组成。 。电极结构是使用具有不同尺寸和功能特征的GC定制的，这些尺寸和功能特征对其在机械变形和电解质渗入电池组件中的坚固性至关重要。^-1在以0.2 C的电流速率循环100次之后。包含rGO / GC / S阴极和锂阳极的形状适合的电池原型在重复的弯曲/展平循环中显示出稳定的放电特性。由弹性体支撑的LSB原型具有稳定的放电性能，并具有高达50％的扩展率的高机械强度。上述发现为基于石墨烯结构的合理设计开发出用于柔性，高性能LSB的硫阴极提供了新的思路。