材料科学
法拉第效率
电解质
枝晶(数学)
水溶液
图层(电子)
溶剂化
亥姆霍兹自由能
化学物理
金属
电极
电化学
电化学电位
冶金
化学工程
纳米技术
分子
热力学
有机化学
物理化学
工程类
物理
化学
数学
几何学
作者
Yang Yang,Haiming Hua,Zeheng Lv,Qian Zhang,Chaoyue Liu,Zhipeng Wen,Haodong Xie,Weidong He,Jinbao Zhao,Cheng Chao Li
标识
DOI:10.1002/adfm.202212446
摘要
Abstract Aqueous rechargeable Zn metal batteries (AZMBs) have attracted widespread attention due to their intrinsic high volumetric capacity and low cost. However, the unstable Zn/electrolyte interface causes Zn dendrite growth and side reactions, resulting in poor Coulombic efficiency and unsatisfactory lifespan. Herein, a SiO 2 reinforced‐sodium alginate (SA) hybrid film is designed to regulate solid–liquid interaction energy and spatial distribution of all species in the electric double layer (EDL) near the Zn electrode. The unique interfacial layer gives rise to a uniform distribution of Zn 2+ in the Helmholtz layer through solvation sheath modulation. Moreover, theoretical calculations show that the SO 4 2− anions and free‐water are substantially reduced in the Helmholtz layer, effectively suppressing hydrogen evolution reaction and formation of by‐products through strong charge repulsion and hydrogen bond fixing of free‐water. The reconfigured EDL not only ensures homogenous and fast Zn 2+ transport kinetics for dendrite‐free Zn deposition, but also eliminates interface parasitic side reactions. The Zn@SiO 2 ‐SA electrode enables excellent cycling stability of symmetrical cells and high‐loading full AZMBs with a lifespan over 3000 h and an areal capacity of 2.05 mAh cm −2 , thus laying a solid basis for realizing practical AZMBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI