枝晶(数学)
阳极
分离器(采油)
材料科学
膜
顶端树突
铁电性
极化(电化学)
介孔材料
纳米技术
化学工程
化学
电极
光电子学
电介质
生物化学
几何学
数学
医学
物理
大脑皮层
物理化学
内科学
工程类
热力学
催化作用
作者
Yutao Dong,W. Liu,Corey Carlos,Ziyi Zhang,Jun Li,Fengdan Pan,Jiajie Sui,Xudong Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-15
标识
DOI:10.1021/acs.nanolett.3c05032
摘要
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.
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