共聚物
两亲性
材料科学
阳极
接口(物质)
化学工程
高分子化学
化学
有机化学
分子
工程类
聚合物
复合材料
电极
物理化学
吉布斯等温线
作者
Xiujuan Chen,Peiyuan Gao,Wei Li,Nhat Anh Thi Thieu,Zane A. Grady,Novruz G. Akhmedov,Konstantinos A. Sierros,V. Murugesan,Valery V. Khramtsov,David Reed,Xiaolin Li,Xingbo Liu
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2024-03-21
卷期号:: 1654-1665
标识
DOI:10.1021/acsenergylett.3c02824
摘要
Aqueous Zn-based electrochemical technologies hold promise for large-scale energy storage applications, yet challenges persist in the unsatisfied Zn reversibility arising from an unstable Zn/electrolyte interface. Here, we employ molecular interface engineering using amphiphilic Pluronic triblock copolymers as electrolyte additives to stabilize the Zn anodes. With a balanced hydrophilic–hydrophobic nature, Pluronic F127 adsorbed on the Zn surface constructs a hydrodynamic interphase, where the hydrophobic PPO center shields the Zn surface from water-induced side reactions, while PEO side blocks guide the homogeneous Zn2+ redistribution. Additionally, F127 contributes to the Zn2+ solvation structure to weaken the water activity at the interfacial region. As a result, F127 additive enables cycling durability over 9300 and 3100 h at 1 and 5 mA cm–2, respectively, and considerable cyclability with high-capacity retention across a wide current density range in Zn||VO2 full cells. This study highlights the potential of amphiphilic block copolymers in stabilizing metallic anode interfaces in aqueous electrolytes.
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