阳极
电解质
法拉第效率
极地的
锌
材料科学
化学工程
离子
水溶液
电化学
化学
电极
有机化学
物理化学
物理
工程类
天文
作者
Zhixun Luo,Yufan Xia,Shuang Chen,Xingxing Wu,Ruosheng Zeng,Xuan Zhang,Hongge Pan,Mi Yan,Tingting Shi,Kai Tao,Ben Bin Xu,Yinzhu Jiang
标识
DOI:10.1007/s40820-023-01171-w
摘要
While the rechargeable aqueous zinc-ion batteries (AZIBs) have been recognized as one of the most viable batteries for scale-up application, the instability on Zn anode-electrolyte interface bottleneck the further development dramatically. Herein, we utilize the amino acid glycine (Gly) as an electrolyte additive to stabilize the Zn anode-electrolyte interface. The unique interfacial chemistry is facilitated by the synergistic "anchor-capture" effect of polar groups in Gly molecule, manifested by simultaneously coupling the amino to anchor on the surface of Zn anode and the carboxyl to capture Zn2+ in the local region. As such, this robust anode-electrolyte interface inhibits the disordered migration of Zn2+, and effectively suppresses both side reactions and dendrite growth. The reversibility of Zn anode achieves a significant improvement with an average Coulombic efficiency of 99.22% at 1 mA cm-2 and 0.5 mAh cm-2 over 500 cycles. Even at a high Zn utilization rate (depth of discharge, DODZn) of 68%, a steady cycle life up to 200 h is obtained for ultrathin Zn foils (20 μm). The superior rate capability and long-term cycle stability of Zn-MnO2 full cells further prove the effectiveness of Gly in stabilizing Zn anode. This work sheds light on additive designing from the specific roles of polar groups for AZIBs.
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