“Water-in-montmorillonite” quasi-solid-state electrolyte for ultralow self-discharge aqueous zinc-ion batteries  

作　　者：Yongfeng Huang Rongsheng Guo Yunlin An Wenbao Liu Feiyu Kang 

机构地区：[1]Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [2]School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [3]School of Environmental and Materials Engineering,Yantai University,Yantai 264005,China

出　　处：《Energy Materials and Devices》2024年第4期30-41,共12页能源材料与器件(英文)

基　　金：supported by National Key Research and Development Program of China(Grant No.2022YFB2404500);Shenzhen Outstanding Talents Training Fund(Grant No.01090100002);National Natural Science Foundation of China(Grant No.52201280);Natural Science Foundation of Shandong Province(Grant No.ZR2021QB200).

摘　　要：The practical application of aqueous zinc-ion batteries(AZIBs)is limited by zinc dendrites,parasitic reactions,and self-discharging.Quasi-solid-state electrolytes(QSSEs)are promising solutions but have high costs,low conductivity,and inadequate self-discharge-suppression capability.This study introduces a novel“water-in-montmorillonite(Mont)”(WiME)electrolyte to address these limitations.WiME leverages the layered struc-ture of the inexpensive Mont to confine water,achieving a high ionic conductivity of 64.82 mS/cm and remark-able self-discharge suppression capability and maintaining 92.7%capacity after 720 h.The WiME architec-ture facilitates uniform Zn deposition and promotes cycling stability at high current densities.WiME-based symmetric cells show excellent long-term cycling,surpassing 1900 h,and full Zn||MnOOH cells display stable cycling for 500 cycles without capacity decay,demonstrating synergy among mitigated parasitic reactions,homogenous zinc deposition,and enhanced interfacial stability enabled by WiMEs.This study presents a low-cost and high-performance strategy for advancing the practical application of AZIBs for various fields.

关 键 词：zinc-ion battery self-discharge suppression water-in-montmorillonite quasi-solid-state electrolyte interfacial stability cost effective 

分 类 号：TM9[电气工程—电力电子与电力传动]