A major bottleneck limiting the commercialization of aqueous zinc ion batteries (AZIBs) is dendrite formation on the zinc anode during the plating/stripping process, which leads to rapid performance and device failure. In this regard, researchers are trying to design more stable anodes toward suppressing dendrite formation. One possible solution to tackle this problem and to extend the cycling life of AZIBs is to modify the zinc anode surface by coating carbonaceous materials, enabling controlled charge flux and uniform ion distribution. This work reports a sustainable and bio‐derived polylactic acid (PLA) as a coating layer on the zinc anode. Carbonizing this polymer under ambient conditions using a high‐power nanosecond laser forms a carbon‐coated zinc foil, which was directly utilized as the anode in aqueous zinc ion batteries. The fabricated laser‐processed PLA‐derived carbon‐coated zinc anode demonstrated an extended cycling life of almost 1600 hours, significantly outperforming the bare zinc anode. A full aqueous zinc ion battery assembled from as‐modified anode and as‐prepared V2O5 nanofibers as cathode was able to deliver a specific capacity of 238 mAh g‐1 at 1.0 A g‐1 with a capacity retention of 70 % after 1000 cycles.

中文翻译：

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激光加工聚乳酸衍生碳包锌阳极在水系锌离子电池中的枝晶抑制效果

限制水性锌离子电池（AZIB）商业化的一个主要瓶颈是电镀/剥离过程中锌阳极上形成枝晶，这会导致性能快速下降和器件故障。在这方面，研究人员正在尝试设计更稳定的阳极来抑制枝晶的形成。解决这一问题并延长 AZIB 循环寿命的一种可能的解决方案是通过涂覆碳质材料来修饰锌阳极表面，从而实现受控的电荷通量和均匀的离子分布。这项工作报告了一种可持续的生物衍生聚乳酸（PLA）作为锌阳极上的涂层。使用高功率纳秒激光在环境条件下碳化这种聚合物形成碳涂层锌箔，其直接用作水性锌离子电池的阳极。制造的激光加工 PLA 衍生碳涂层锌阳极表现出近 1600 小时的延长循环寿命，显着优于裸锌阳极。由改性阳极和制备的 V2O5 纳米纤维作为阴极组装而成的全水性锌离子电池能够在 1.0 A g-1 下提供 238 mAh g-1 的比容量，1000 次循环后容量保持率为 70%。