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Flexible aqueous Zn–S battery based on an S-decorated Ti3C2Tx cathode
npj 2D Materials and Applications ( IF 9.1 ) Pub Date : 2023-06-29 , DOI: 10.1038/s41699-023-00411-2
Keval K. Sonigara , Jayraj V. Vaghasiya , Carmen C. Mayorga-Martinez , Martin Pumera

Flexible aqueous zinc-ion batteries can store energy safely and at a low cost, which benefits wearable electronic gadgets; however, currently used cathodes restrict these devices with a low specific capacity and energy density. Herein, we developed a flexible zinc-sulfur (Zn–S) battery constructed by Ti3C2Tx decorated with sulfur (S@Ti3C2Tx) as a cathode and Zn metal anode with iodine-added amphiphilic gel electrolyte (AGE). Benefiting from the confinement synergy of S@Ti3C2Tx cathode, the Zn-S battery exhibited a high storage capacity of 772.7 mAh g−1 at 300 mA g−1, which is higher than a conventional S-decorated carbon cathode (491.7 mAh g−1). More specially, the flexible device offers good cycling stability (82.7%) and excellent mechanical stability with 91% capacity retention after 90° bending (500 cycles). To demonstrate real applications, the flexible Zn–S batteries were integrated in series to power electrical gadgets (e.g., digital clock, light-emitting diode, and robot). It exhibits exceptional flexibility to sustain different deformations and maintains a steady supply of power to run the wearable electronic gadget. These findings offer a fresh starting point for flexible energy storage technologies and show the promising potential of the Zn–S battery in real-world applications.



中文翻译:

基于 S 装饰的 Ti3C2TX 阴极的柔性水性 Zn-S 电池

柔性水性锌离子电池可以安全、低成本地储存能量,这有利于可穿戴电子产品;然而,目前使用的阴极限制了这些装置的比容量和能量密度较低。在此,我们开发了一种柔性锌硫(Zn-S)电池,由硫装饰的Ti 3 C 2 T x (S@Ti 3 C 2 T x)作为阴极和锌金属阳极以及添加碘的两亲性凝胶电解质构成(年龄)。得益于S@Ti 3 C 2 T x正极的限域协同作用,Zn-S电池在300 mA g −1时表现出772.7 mAh g −1的高存储容量,高于传统的S装饰碳阴极(491.7 mAh g -1)。更特别的是,该柔性器件具有良好的循环稳定性(82.7%)和出色的机械稳定性,90°弯曲(500次循环)后容量保持率为91%。为了演示实际应用,柔性锌硫电池被串联集成,为电子设备(例如数字时钟、发光二极管和机器人)供电。它表现出卓越的灵活性,可以承受不同的变形,并保持稳定的电力供应来运行可穿戴电子设备。这些发现为灵活的储能技术提供了一个新的起点,并展示了锌硫电池在实际应用中的巨大潜力。

更新日期:2023-06-29
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