Integration of homogeneous and heterogeneous nucleation growth via 3D alloy framework for stable Na/K metal anode
作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Materials Science and EngineeringNational Synchrotron Radiation LaboratoryCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of China.HefeiAnhui 230026China School of Materials and EnergyGuangdong University of TechnologyGuangzhouGuangdong510006China
出 版 物：《eScience》 (电化学与能源科学（英文）)
年 卷 期：2021年第1卷第1期
页 面：75-82页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学]
基 金：This work was supported by the National Natural Science Foundation of China(Nos.51925207,U1910210,51872277,22005292,52002083) the National Synchrotron Radiation Laboratory(KY2060000173) the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(Grant.YLU-DNL Fund 2021002) the Fundamental Research Funds for the Central Universities(WK2060140026)
主 题：Na/K metal anode 3D host structure Homogeneous nucleation Heterogeneous nucleation Na_(3)Bi/K_(3)Bi
摘 要：Sodium/Potassium(Na/K)metal anodes have been considered as the promising anodes for next-generation Na/K secondary batteries owing to their ultrahigh specific capacity,low redox potential and low ***,their practical application is still hampered due to unstable solid electrolyte interphase,infinite volume change,and dendrite ***,we design a 3D-Na_(3)Bi/3D-K_(3)Bi alloy host which enables the homogeneous and heterogeneous nucleation growth of Na/K *** unique structure with periodic alternating of electron and ion conductivity improves the mass transfer kinetics and prevents the volume expansion during ***,the sodiophilicity of Na_(3)Bi/potassiophilicity of K_(3)Bi framework can avoid dendritic *** lifespans over 700 h with 1 mAh cm^(−2)for 3D-Na_(3)Bi@Na electrode and about 450 h with 1 mAh cm^(−2)for 3D-K_(3)Bi@K electrode are achieved,respectively.3D-Na_(3)Bi@Na||Na_(3)V_(2)(PO_(4))3 full battery shows sustainable cycle performance over 400 *** design provides a simple but effective approach for achieving safety of sodium/potassium metal anodes.
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