Designing Conformal Electrode-electrolyte Interface by Semi-solid NaK Anode for Sodium Metal Batteries

作     者：YIN Chunsen CHEN Zeyuan WANG Xiuli 尹春森;陈泽远;王秀丽

作者机构：School of Materials Science and EngineeringZhejiang UniversityHangzhou 310058China 

出 版 物：《材料科学与工程学报》 (Journal of Materials Science and Engineering)

年 卷 期：2024年第42卷第4期

页      面：533-543页

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China(52073253) 

主　　题：Solid-state Na metal battery NaK alloy Gel electrolyte electrode-electrolyte interface dendrite free anode 

摘      要：Solid-state Na metal batteries(SSNBs),known for its low cost,high safety,and high energy density,hold a significant position in the next generation of rechargeable ***,the urgent challenge of poor interfacial contact in solid-state electrolytes has hindered the commercialization of *** by the concept of intimate electrode-electrolyte interface design,this study employs a combination of NaK alloy and carbon nanotubes to prepare a semi-solid NaK(NKC)*** traditional Na anodes,the paintable paste-like NKC anode exhibits superior adhesion and interface compatibility with both current collectors and gel electrolytes,significantly enhancing the intimate contact of electrode-electrolyte ***,the filling of SiO_(2)nanoparticles improves the wettability of NaK alloy on gel polymer electrolytes,further achieving a conformal interface ***,the overpotential of the NKC symmetric cell is markedly lower than that of the Na symmetric cell when subjected to a long cycle of 300 *** full cell coupled with Na_(3)V_(3)(PO_(4))_(2)cathodes had an initial discharge capacity of 106.8 mAh·g^(-1)with a capacity retention of 89.61%after 300 cycles,and a high discharge capacity of 88.1 mAh·g^(-1)even at a high rate of 10 *** outstanding electrochemical performance highlights the promising application potential of the NKC electrode.