Breath inspired multifunctional low-cost inorganic colloidal electrolyte for stable zinc metal anode  

作　　者：Mengyu Rong Yifu Zhang Xianfang Tan Yang Wang Na Gao Chi Huang Changgong Meng 

机构地区：[1]State Key Laboratory of Fine Chemicals,School of Chemistry,Dalian University of Technology,Dalian 116024,Liaoning,China [2]Hubei Key Laboratory of Radiation Chemistry and Functional Materials,School of Nuclear Technology and Chemistry&Biology,Hubei University of Science and Technology,Xianning 437100,Hubei,China [3]College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,Hubei,China [4]College of Environmental and Chemical Engineering,Dalian University,Dalian 116622,Liaoning,China

出　　处：《Journal of Energy Chemistry》2025年第3期218-229,共12页能源化学(英文版)

基　　金：the Doctoral Research Start-up Fund of Hubei University of Science and Technology(BK202504);the Natural Science Foundation of Liaoning Province(2023-MS-115)。

摘　　要：The practical application of aqueous zinc-ion batteries(AZIBs)is primarily constrained by issues such as corrosion,zinc dendrite formation,and the hydrogen evolution reaction occurring at the zinc metal anode.To overcome these challenges,strategies for optimizing the electrolyte are crucial for enhancing the stability of the zinc anode.Inspired by the role of hemoglobin in blood cells,which facilitates oxygen transport during human respiration,an innovative inorganic colloidal electrolyte has been developed:calcium silicate-ZnSO_(4)(denoted as CS-ZSO).This electrolyte operates in weak acidic environment and releases calcium ions,which participate in homotopic substitution with zinc ions,while the solvation environment of hydrated zinc ions in the electrolyte is regulated.The reduced energy barrier for the transfer of zinc ions and the energy barrier for the desolvation of hydrated ions imply faster ion transfer kinetics and accelerated desolvation processes,thus favoring the mass transfer process.Furthermore,the silicate colloidal particles act as lubricants,improving the transfer of zinc ions.Together,these factors contribute to the more uniform concentration of zinc ions at the electrode/electrolyte interface,effectively inhibiting zinc dendrite formation and reducing by-product accumulation.The Zn//CS-ZSO//Zn symmetric cell demonstrates stable operation for over 5000 h at 1 mA cm^(-2),representing 29-fold improvement compared to the Zn//ZSO//Zn symmetric cell,which lasts only 170 h.Additionally,the Zn//CS-ZSO//Cu asymmetric cell shows stable average Coulombic efficiency(CE)exceeding 99.6%over2400 cycles,significantly surpassing the performance of the ZSO electrolyte.This modification strategy for electrolytes not only addresses key limitations associated with zinc anodes but also provides valuable insights into stabilizing anodes for the advancement of high-performance aqueous zinc-ion energy storage systems.

关 键 词：Inorganic colloidal electrolyte Calcium silicate lonhomotopic substitution Dendrite-free Zn anodes Aqueous zinc-ion battery 

分 类 号：TM911.1[电气工程—电力电子与电力传动]