Guo Wenbin, Bai Xue, Cong Zifeng, Pan Chongxiang, Wang Luyao, Li Longwei, Chang Caiyun, Hu Weiguo, Pu Xiong
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
ACS Appl Mater Interfaces. 2022 Sep 21;14(37):41988-41996. doi: 10.1021/acsami.2c09909. Epub 2022 Sep 8.
Rechargeable Zn batteries are widely studied as aqueous, safe, and environmentally friendly alternatives to Li-ion batteries. The 3D porous Zn anode has been extensively reported for suppressing Zn dendrite growth and accelerating the electrode kinetics. However, we demonstrate herein that the undesirable hydrogen evolution reaction (HER) is also exacerbated for porous Zn electrode. Therefore, a polytetrafluoroethylene (PTFE) coating is further applied on the porous Zn serving as the artificial solid-electrolyte interphase (SEI), which is demonstrated to effectively inhibit the hydrogen evolution and maintain the Zn plating kinetics. By utilizing the synergistic effects of the porous morphology and artificial SEI layer, better performances are obtained over porous Zn or bare Zn foil, including dendrite-free Zn plating/stripping up to 2000 h at 2 mA cm and extended cycling in the Zn||VO cell. This work suggests two complementary strategies for achieving simultaneously dendrite-free and side-reaction-suppressed Zn batteries.
可充电锌电池作为锂离子电池的水性、安全且环保的替代品，受到了广泛研究。三维多孔锌阳极已被广泛报道用于抑制锌枝晶生长并加速电极动力学。然而，我们在此证明，多孔锌电极的析氢反应（HER）也会加剧。因此，在多孔锌上进一步涂覆聚四氟乙烯（PTFE）作为人工固体电解质界面（SEI），结果表明其能有效抑制析氢并维持锌电镀动力学。通过利用多孔形态和人工SEI层的协同效应，与多孔锌或裸锌箔相比，获得了更好的性能，包括在2 mA cm下无枝晶的锌电镀/剥离长达2000小时，以及在Zn||VO电池中延长循环寿命。这项工作提出了两种互补策略，以实现同时无枝晶和抑制副反应的锌电池。
