The Three-Dimensional Dendrite-Free Zinc Anode on a Copper Mesh with a Zinc-Oriented Polyacrylamide Electrolyte Additive.,Angewandte Chemie International Edition

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The Three-Dimensional Dendrite-Free Zinc Anode on a Copper Mesh with a Zinc-Oriented Polyacrylamide Electrolyte Additive.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-09-09 , DOI: 10.1002/anie.201907830
Qi Zhang ₁ , Jingyi Luan ₁ , Liang Fu ₂ , Shengan Wu ₁ , Yougen Tang ₁ , Xiaobo Ji ₁ , Haiyan Wang ₁

Affiliation

Rechargeable aqueous zinc-ion batteries have been considered as a promising candidate for next-generation batteries. However, the formation of zinc dendrites are the most severe problems limiting their practical applications. To develop stable zinc metal anodes, a synergistic method is presented that combines the Cu-Zn solid solution interface on a copper mesh skeleton with good zinc affinity and a polyacrylamide electrolyte additive to modify the zinc anode, which can greatly reduce the overpotential of the zinc nucleation and increase the stability of zinc deposition. The as-prepared zinc anodes show a dendrite-free plating/stripping behavior over a wide range of current densities. The symmetric cell using this dendrite-free anode can be cycled for more than 280 h with a very low voltage hysteresis (93.1 mV) at a discharge depth of 80 %. The high capacity retention and low polarization are also realized in Zn/MnO2 full cells.

中文翻译：

含锌定向聚丙烯酰胺电解质添加剂的铜网上的三维无枝晶锌阳极。

可再充电的水性锌离子电池已被认为是下一代电池的有前途的候选者。然而，锌枝晶的形成是最严重的问题，限制了它们的实际应用。为了开发稳定的锌金属阳极，提出了一种协同方法，该方法结合了具有良好锌亲和力的铜网骨架上的Cu-Zn固溶体界面和聚丙烯酰胺电解质添加剂来修饰锌阳极，这可以大大降低锌的超电势成核并增加锌沉积的稳定性。所制备的锌阳极在很宽的电流密度范围内均表现出无枝晶的镀覆/剥离行为。使用这种无枝晶阳极的对称电池可以在80％的放电深度下以极低的电压磁滞（93.1 mV）循环280小时以上。

更新日期：2019-09-09

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