Heterometallic Seed-Mediated Zinc Deposition on Inkjet Printed Silver Nanoparticles Toward Foldable and Heat-Resistant Zinc Batteries
Heterometallic Seed-Mediated Zinc Deposition on Inkjet Printed Silver Nanoparticles Toward Foldable and Heat-Resistant Zinc Batteries
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DOI：
10.1002/adfm.202101607
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发表时间：
2021-04-08
影响因子：
19
通讯作者：
Xue, Jun Min
中科院分区：
文献类型：
--
作者：
Chen, Tao;Wang, Yinan;Xue, Jun Min
为了实现高性能的锌金属电池，必须解决在Zn阳极处发生的枝晶生长和副反应的问题，特别是当电池在高电流密度和高温下操作时。本文报道了一种柔性无枝晶Zn金属阳极（AgNPs@CC/Zn），该阳极通过在3D碳基体上喷墨印刷银纳米颗粒而制备。实验观察和DFT计算表明，Ag纳米颗粒可以作为锌沉积的异金属种子，从而同时提高碳基体的亲锌性和热导率。这不仅降低了Zn成核过电位并引导均匀的Zn成核，而且通过Ag-Zn合金化/去合金化反应促进可逆的锌剥离/电镀。结果表明，AgNPs@CC/Zn阳极在10 mA cm-2的高电流密度下具有80 mV的低电压滞后和超过480 h的上级循环。AgNPs@CC/Zn阳极可以使全电池具有出色的循环稳定性和增强的高温耐久性。此外，使用AgNPs@CC/Zn阳极的可折叠袋电池表现出高容量保持率，而不管不同的变形状态。这项工作证明了喷墨打印技术在开发用于可折叠和耐热锌电池的3D无枝晶锌阳极方面的潜力。
To achieve high performed zinc metal batteries, it is imperative to address the issues of dendrite growth and the side-reactions occurring at the Zn anode, particularly when the batteries are operated at high current densities and high temperature. Herein, a flexible and dendrite-free Zn metal anode (AgNPs@CC/Zn), which is prepared by inkjet printing silver nanoparticles on a 3D carbon matrix, is reported. Experimental observations and DFT calculation reveal that the Ag nanoparticles can work as heterometallic seeds for zinc deposition, and thus simultaneously improve the zincophilicity and thermal conductivity of the carbon matrix. This not only lowers the Zn nucleation overpotential and guides the uniform Zn nucleation but also promotes the reversible zinc stripping/plating via Ag-Zn alloying/de-alloying reactions. As a result, the AgNPs@CC/Zn anode presents low voltage hysteresis of 80 mV and superior cycling over 480 h at a high current density of 10 mA cm(-2). The AgNPs@CC/Zn anode can enable full cells with exceptional cyclic stability and enhanced high-temperature endurance. Furthermore, the foldable pouch cell using the AgNPs@CC/Zn anode exhibits high capacity retention regardless of different deformation status. This work demonstrates the promising potential of inkjet printing technology in developing 3D dendrite-free zinc anode for foldable and heat-resistant zinc batteries.