Accordion Frameworks Enable Free-Standing,High Si Content Anode for Li-ion Batteries
作者机构：State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers & Polymer CompositesDepartment of Macromolecular ScienceFudan UniversityShanghai 200438China State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers & Polymer CompositesDepartment of Macromolecular ScienceFudan UniversityShanghai 200438China State Key Laboratory of Solidification ProcessingCenter of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Solidification ProcessingCenter for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene NPU)Xi'an 710072China Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang ProvinceDepartment of ChemistryZhejiang Sci-Tech UniversityHangzhou 310018China State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers & Polymer CompositesDepartment of Macromolecular ScienceFudan UniversityShanghai 200438China Yiwu Research Institute of Fudan UniversityYiwu 322000China
出 版 物：《能源与环境材料（英文）》 (Energy & Environmental Materials)
年 卷 期：2023年第6卷第5期
页 面：281-287页
核心收录：
基 金：supported by Shaanxi Yanchang Petroleum Co., Ltd Yiwu Research Institute of Fudan University 国家自然科学基金 the Shanghai International Collaboration Research Project
主 题：accordion anode free-standing high Si content high-performance
摘 要：Implementing high-performance silicon(Si)anode in actual processing and application is highly desirable for next-generation,high-energy Li-ion ***,high content of inactive matrix(including conductive agent and binder)is often indispensable in order to ensure local conductivity and suppress pulverization tendency of Si particles,which thus cause great capacity loss based on the mass of whole ***,we designed an accordion-structured,high-performance electrode with high Si content up to 95％.Si nanoparticles were well anchored into the interlayer spacings of accordion-like graphene arrays,and free-standing electrode was prepared via a simple filtration process without any *** accordion framework ensures strong confinement effect of Si nanoparticles and also provides direct,non-tortuous channels for fast electrochemical reaction *** a consequence,the accordion Si electrodes exhibit ultrahigh,electrode-based capacities up to 3149 mAh g-1(under Si content of 91％),as well as long-term ***,the accordion electrode can bear extreme condition of over-lithiation and maintains stable in full-cell *** design provides a significant stride in high Si content toward realistic,high-performance electrodes.