Monothetic and conductive network and mechanical stress releasing layer on micron-silicon anode enabling high-energy solid-state battery

作     者：Xiang Han Min Xu Lan-Hui Gu Chao-Fei Lan Min-Feng Chen Jun-Jie Lu Bi-Fu Sheng Peng Wang Song-Yan Chen Ji-Zhang Chen Xiang Han;Min Xu;Lan-Hui Gu;Chao-Fei Lan;Min-Feng Chen;Jun-Jie Lu;Bi-Fu Sheng;Peng Wang;Song-Yan Chen;Ji-Zhang Chen

作者机构：College of Materials Science and EngineeringCo-Innovation Center of Efficient Processing and Utilization of Forestry ResourcesNanjing Forestry UniversityNanjing210037China Department of PhysicsXiamen UniversityXiamen361005China Western Digital CorporationMilpitasCA95035USA 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2024年第43卷第3期

页      面：1017-1029页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0806[工学-冶金工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(No.22209075) the Natural Science Foundation of Jiangsu Province(BK20200800) 

主　　题：Lithium-ion battery(LIB) Solid-state electrolyte(SSE) Silicon anode Stress relief Coating 

摘      要：Silicon has ultrahigh capacity,dendrite-free alloy lithiation mechanism and low cost and has been regarded as a promising anode candidate for solid-state *** to the low infiltration of solid-state electrolyte(SSE),not the unstable solid-electrolyte interphase(SEI),but the huge stress during lithiation-and delithiation-induced particle fracture and conductivity lost tend to be the main *** this study,starting with micron-Si,a novel monothetic carbon conductive framework and a MgO coating layer are designed,which serve as electron pathway across the whole electrode and stress releasing layer,*** addition,the in situ reaction between Si and SSE helps to form a LiF-rich and mechanically stable SEI *** a result,the mechanical stability and charge transfer kinetics of the uniquely designed Si anode are significantly ***,high initial Coulombic efficiency,high capacity and durable cycling stability can be achieved by applying the Si@MgO@C anode in *** example,high specific capacity of 3224.6 mAh·g^(-1)and long cycling durability of 200 cycles are *** work provides a new concept for designing alloy-type anode that combines surface coating on particle and electrode structure design.