Anodic dendrite formation is a critical issue in rechargeable batteries and often leads to poor cycling stability and quick capacity loss. Prevailing strategies for dendrite suppression aim at slowing down the growth rate kinetically but still leaving possibilities for dendrite evolution over time. Herein, we report a complete dendrite elimination strategy using a mesoporous ferroelectric polymer membrane as the battery separator. The dendrite suppression is realized by spontaneously reversing the surface energetics for metal ion reduction at the protrusion front, where a positive piezoelectric polarization is generated and superimposed as the protrusion compresses the separator. This effect is demonstrated first in a Zn electroplating process, and further in Zn–Zn symmetric cells and Zn–NaV₃O₈·1.5H₂O full cells, where the dendritic Zn anode surfaces are completely turned into featureless flat surfaces. Consequently, a substantially longer charging/discharging cycle is achieved. This study provides a promising pathway toward high-performance dendrite-free rechargeable batteries.

中文翻译：

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可充电电池中铁电膜分离器的活性枝晶抑制

阳极枝晶的形成是可充电电池中的一个关键问题，通常会导致循环稳定性差和容量快速损失。主流的枝晶抑制策略旨在从动力学上减慢生长速率，但仍然留下枝晶随时间演化的可能性。在此，我们报告了一种使用介孔铁电聚合物膜作为电池隔膜的完整枝晶消除策略。枝晶抑制是通过自发地反转突出物前端金属离子还原的表面能来实现的，当突出物压缩分离器时，会产生并叠加正压电极化。这种效应首先在锌电镀过程中得到证明，并在 Zn-Zn 对称电池和 Zn-NaV ₃ O ₈ ·1.5H ₂ O 全电池中得到进一步证明，其中树枝状 Zn 阳极表面完全变成无特征的平坦表面。因此，实现了显着更长的充电/放电周期。这项研究为高性能无枝晶可充电电池提供了一条有前途的途径。