Room-temperature liquid metal engineered iron current collector enables stable and dendrite-free sodium metal batteries in carbonate electrolytes

作     者：Chuanliang Wei Liwen Tan Yuchan Zhang Huiyu Jiang Baojuan Xi Shenglin Xiong Jinkui Feng Chuanliang Wei;Liwen Tan;Yuchan Zhang;Huiyu Jiang;Baojuan Xi;Shenglin Xiong;Jinkui Feng

作者机构：Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education)Research Center for Carbon NanomaterialsSchool of Materials Science and EngineeringShandong UniversityJinan 250061China School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第115卷第20期

页      面：156-165页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 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：the the National Natural Science Foundation of China(No.51972198 62133007) Taishan Scholars Program of Shandong Province(Nos.tsqn201812002,ts20190908) the Natural Science Foundation of Shandong Province(No.ZR2020JQ19) the Project of the Taishan Scholar(No.ts201511004)。 

主　　题：Stainless steel Current collector Sodium metal anode Liquid metal Carbonate electrolyte 

摘      要：Metallic sodium(Na)is believed to be a promising anode material for sodium-ion batteries(SIBs)due to its low electrochemical potential,high theoretical specific capacity,superior electrical conductivity,and so on.However,issues such as high chemical activity,the growth of Na dendrites,large volume change,and unstable interface impede its practical application.We design a cheap iron(Fe)-based substrate decorated by a thin liquid metal Ga layer for stable and dendrite-free Na metal anodes in low-cost carbonate electrolytes.The inherent mechanism of Ga-based liquid metal in inhibiting the growth of Na dendrites was revealed for the first time.Liquid metal Ga with sodiophilic property can act as nucleation seeds to decrease the nucleation barrier and induce homogeneous Na+flux,resulting in uniform and dendrite-free Na deposition.Full cells with Na_(3)V_(2)(PO_(4))_(3) cathode were also assembled to verify the practical application ability of the modified Na metal anode.Under the regulation of the liquid metal layer,the Coulombic efficiency,cycling life,and capacity of batteries are obviously enhanced.The strategy proposed here cannot only reduce the cost of batteries but also improve their electrochemical and safety performance.