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 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI