Shengkang Zhan, Zixuan Liu, Fanghua Ning, Xiaoyu Liu, Ye Dai, Shigang Lu, Yongyao Xia, Jin Yi
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引用次数: 0
Abstract
The practical application of aqueous zinc ion batteries (AZIBs) is impeded by the instability of the Zn anode|electrolyte interface, including dendrite growth, hydrogen evolution reaction (HER), and corrosion. Herein, the periodical micro-nano structure is constructed on the surface of Zn anode through picosecond laser lithography (PLL) technology. This micro-nano surface structure is conductive to obtain hydrophobicity for diminishing direct contact between the electrolyte and Zn anode, enhancing the corrosion resistance of the Zn anode. Simultaneously, the low surface energy and reconstructed electric field are achieved through laser-induced texture microstructure, leading to the oriented Zn2+ deposition along the (002) plane. As a result, the lower electrochemical polarization and long cycling stability of 1400 h for Zn||Zn symmetric cell is achieved at 4 mA cm−2 and 2 mAh cm−2. The average coulombic efficiency (CE) of the Zn||Cu cell is enhanced to 99.83% at 2 mA cm−2, while the Zn||MnO2 cell delivers a capacity retention of 68.7% after 600 cycles at 1 A g−1. Consequently, the advantages of micro-nano structure can highlight the importance of surface structure design for the development of stable Zn anode.
锌阳极|电解质界面的不稳定性,包括枝晶生长、析氢反应(HER)和腐蚀,阻碍了锌离子电池的实际应用。本文采用皮秒激光光刻技术在锌阳极表面构建了周期微纳结构。这种微纳米表面结构有助于获得疏水性,从而减少电解液与锌阳极之间的直接接触,提高锌阳极的耐腐蚀性。同时,通过激光诱导织构结构实现了低表面能和重构电场,导致Zn2+沿(002)面取向沉积。结果表明,在4 mA cm−2和2 mAh cm−2下,Zn||对称电池具有较低的电化学极化和1400 h的长周期稳定性。在2 mA cm−2下,Zn||Cu电池的平均库仑效率(CE)提高到99.83%,而Zn||MnO2电池在1 ag−1下循环600次后的容量保持率为68.7%。因此,微纳结构的优势凸显了表面结构设计对开发稳定锌阳极的重要性。
期刊介绍:
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