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Dependence of lithium metal battery performances on inherent separator porous structure regulation

Journal of Energy Chemistry 2023年第9期84卷 436-447页

作者： Lei Ding Dandan Li Lingyang Liu Pengfang Zhang Fanghui Du Chao Wang Daoxin Zhang Shuo Zhang Sihang Zhang Feng Yang Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology Institute of BioPharmceutical ResearchSchool of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000ShandongChina State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065SichuanChina College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Food Science and Engineering Hainan UniversityHaikou 570228HainanChina

Boosting of rechargeable lithium metal batteries(LMBs) holds challenges because of lithium dendrites germination and high-reactive surface *** may experience structure-determined chemical deterioration and worsen Li plating-stripping behaviors when smoothly shifting from lithium-ion batteries(LIBs) to *** study precisely regulations the crystal structure of β-polypropylene and separator porous construction to investigate the intrinsic porous structure and mechanical properties determined electrochemical performances and cycling durability of *** structure characterizations,porous structure analyses,and electrochemical cycling tests uncover appropriate annealing thermal stimulation concentrates β-lamellae thickness and enhances lamellae thermal stability by rearranging molecular chain in inferior β-lamellae,maximally homogenizing biaxial tensile deformation and resultant porous *** even pores with high connectivity lower ion migration barriers,alleviate heterogeneous Li^(+) flux dispersion,stabilize reversible Li plating-stripping behaviors,and hinder coursing and branching of Li dendrites,endowing steady cell cycling durability,especially at higher currents due to the highlighted uncontrollable cumulation of dead Li,which offers new insights for the current pursuit of high-power density battery and fast charging *** suggested separator structure-chemical nature functions in ensuring cyclic cell stability and builds reliable relationships between separator structure design and practical LMBs applications.

关键词： Lithium metal battery Polyolefin separator porous structure design Lithium dendrite regulation Cycling stability

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Additive manufacturing of porous magnesium alloys for biodegradable orthopedic implants:Process,design,and modification

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Journal of Materials Science & Technology 2024年第15期182卷 79-110页

作者： Bo Peng Haojing Xu Fei Song Peng Wen Yun Tian Yufeng Zheng State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Institute for Precision Medicine Tsinghua University Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Department of Orthopedics Peking University Third HospitalBeijing 100191China Department of Materials Science and Engineering Peking UniversityBeijing 100871China

Biodegradable magnesium(Mg)alloys exhibit excellent biocompatibility,adequate mechanical properties,and osteogenic *** can contribute to complete recovery of damaged tissues without concerns about a second surgery and have achieved clinical applications in orthopedic and cardiovascular *** scaffolds can provide functions such as bone integration and adjustable mechanical properties,thus widely used for bone *** manufacturing(AM)offers the advantages of design freedom and high precision,enabling the reliable production of porous scaffolds with customized *** combination of biodegradable Mg alloys,porous scaffolds,and AM processes has created tremendous opportunities for the precision treatment of bone *** article reviews the current development in the additive manufacturing process and design of Mg alloy biodegradable orthopedic implants,fo-cusing on chemical compositions,structural design,surface treatment,and their effects on mechanical properties,degradation behavior,and ***,the future perspective of porous Mg alloy biodegradable orthopedic implants is proposed.

关键词： Biodegradable magnesium alloys Additive manufacturing Laser powder bed fusion Orthopedic implants porous structure design Degradation behavior

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