电解质
双层
法拉第效率
电极
材料科学
无定形固体
化学工程
图层(电子)
剥离(纤维)
相间
膜
化学
纳米技术
复合材料
结晶学
生物化学
物理化学
生物
工程类
遗传学
作者
Yahan Meng,Mingming Wang,Jiazhi Wang,Xuehai Huang,Xiang‐Feng Zhou,Muhammad Sajid,Zehui Xie,Ruihao Luo,Zhengxin Zhu,Zuodong Zhang,Nawab Ali Khan,Yu Wang,Zhenyu Li,Wei Chen
标识
DOI:10.1038/s41467-024-52611-z
摘要
Abstract Construction of a solid electrolyte interphase (SEI) of zinc (Zn) electrode is an effective strategy to stabilize Zn electrode/electrolyte interface. However, single-layer SEIs of Zn electrodes undergo rupture and consequent failure during repeated Zn plating/stripping. Here, we propose the construction of a robust bilayer SEI that simultaneously achieves homogeneous Zn 2+ transport and durable mechanical stability for high Zn utilization rate (ZUR) and Coulombic efficiency (CE) of Zn electrode by adding 1,3-Dimethyl-2-imidazolidinone as a representative electrolyte additive. This bilayer SEI on Zn surface consists of a crystalline ZnCO 3 -rich outer layer and an amorphous ZnS-rich inner layer. The ordered outer layer improves the mechanical stability during cycling, and the amorphous inner layer homogenizes Zn 2+ transport for homogeneous, dense Zn deposition. As a result, the bilayer SEI enables reversible Zn plating/stripping for 4800 cycles with an average CE of 99.95% (± 0.06%). Meanwhile, Zn | |Zn symmetric cells show durable lifetime for over 550 h with a high ZUR of 98% under an areal capacity of 28.4 mAh cm −2 . Furthermore, the Zn full cells based on the bilayer SEI functionalized Zn negative electrodes coupled with different positive electrodes all exhibit stable cycling performance under high ZUR.
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