Simultaneously enhancing ionic conductivity and interfacial stability by Fe_(2)O_(3) for solid-state sodium metal batteries

作     者：Jicheng Xu Huachao Tao Zerong Deng Xuelin Yang Li-Zhen Fan 

作者机构：College of Electrical Engineering&New EnergyChina Three Gorges UniversityYichangHubei443002China College of Materials and Chemical EngineeringHubei Provincial Collaborative Innovation Center for New Energy MicrogridChina Three Gorges UniversityYichangHubei443002China Beijing Advanced Innovation Center for Materials Genome EngineeringInstitute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2024年第10卷第6期

页      面：1243-1251页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(22179071 and 52072217) the National Key R&D Program of China(2022YFB3807700) the Hubei Natural Science Foundation for Distinguished Young Scholars(2023AFA089) the Hubei Natural Science Foundation Innovation Group Project(2022CFA020) the Major Technological Innovation Project of Hubei Science and Technology Department(2019AAA164) Joint Funds of the Hubei Natural Science Foundation Innovation and Development(2022CFD034) 

主　　题：Solid-state electrolyte Na_(3)Zr_(2)Si_(2)PO_(12) Fe_(2)O_(3) Ionic conductivity Interfacial stability 

摘      要：NASICON-structured Na_(3)Zr_(2)Si_(2)PO_(12)(NZSP)has been considered as one of the ideal electrolytes for all-solid-state sodium metal batteries(ASSSB).However,the practical application of NZSP-based ASSSB is hindered by the low ionic conductivity and large interfacial resistance caused by the poor contact between NZSP and Na ***,the introduction of Fe_(2)O_(3) not only improves ionic conductivity and reduces activation energy by the doping of Fe^(3+)in the crystal structure of NZSP,but also reduces the interfacial resistance and enhances interface stability between NZSP and Na metal *** synergistic effects significantly enhance the cycling stability,rate capability,and critical current density of the symmetrical solid-state *** interfacial reaction mechanism indicates that Fe3+in the interface is reduced Fe2+by Na anode,which effectively even the electric-filed distribution and suppresses the dendrite ***,the symmetric solid-state cells exhibit stable cycling performance for 1,500 h at 0.1 mA·cm−1/0.1 mA·h·cm−1 and over 900 h at 0.2 mA·cm−1/0.2 mA·h·cm−*** Na|NZSP-0.075%Fe_(2)O_(3)|Na_(2)FePO_(4)F solid-state full cells display high capacity retention of 94.2%after 100 cycles at 0.5 *** stable interface of NZSP/Na and improved ionic conductivity contribute to excellent electrochemical performance,which accelerates the practical application of ASSSB.