The development of lithium sulfur batteries (LSBs) has significantly suffered from the shuttle of lithium polysulfides (LiPS) and drastic volume change of the active materials during cycling processes. The eco-friendly manufacturing of electrodes based on aqueous slurries is highly desirable for practical applications. To address these challenging issues, a novel aqueous-processable polymer, chitosan sulfate ethylamide glycinamide (CSEG), has been developed as the binder for sulfur cathode. The dual-amide structures endow the CSEG with superior LiPS-trapping capability to impede the diffusion and shuttle of LiPS in electrolyte. The CSEG-based sulfur cathodes demonstrate remarkable cycling performances at 1 C for 700 cycles and 6 C for 450 cycles, with only 0.049%, 0.0895% capacity fading per cycle, respectively. More importantly, the cathode achieves excellent rate performance with a capacity of 194.4 mAh g^-1 at an ultrahigh current density of 40.26 mA cm^-2 (20 C), which takes only 21 s for one charge or discharge process. The electrochemical performance of the novel CSEG binder, as demonstrated in this work, is superior to all previously reported aqueous-processable binders for sulfur cathode. Such a breakthrough will greatly improve the development of eco-friendly sulfur cathode, paving new ways for the practical application of next-generation LSBs.

锂硫电池（LSBs）的发展受到多硫化锂（LiPS）的穿梭和活性物质在循环过程中急剧变化的困扰。基于水浆料的电极的生态友好的制造对于实际应用是非常期望的。为了解决这些具有挑战性的问题，已开发出一种新型的可水处理的聚合物，即壳聚糖硫酸乙酯乙酰胺甘氨酰胺（CSEG）作为硫阴极的粘合剂。双酰胺结构赋予CSEG优异的LiPS捕获能力，可阻止LiPS在电解质中的扩散和穿梭。基于CSEG的硫阴极在​​1 C进行700次循环和6 C在450循环下表现出卓越的循环性能，每个循环的容量分别仅下降0.049％，0.0895％。更重要的是，^-1在40.26 mA cm ^-2（20 C）的超高电流密度下进行，一个充电或放电过程仅需21 s。如这项工作所示，新型CSEG粘合剂的电化学性能优于所有先前报道的用于硫阴极的水可加工粘合剂。这一突破将大大改善环保型硫磺阴极的开发，为下一代LSB的实际应用开辟新途径。