首页|Ordered mesoporous nanofibers mimicking vascular bundles for lithium metal batteries
Ordered mesoporous nanofibers mimicking vascular bundles for lithium metal batteries
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Hierarchical self-assembly with long-range order above centimeters widely exists in nature.Mimicking similar structures to promote reaction kinetics of electrochemical energy devices is of immense interest,yet remains challenging.Here,we report a bottom-up self-assembly approach to constructing ordered mesoporous nanofibers with a structure resembling vascular bundles via electrospinning.The synthesis involves self-assembling polystyrene(PS)homopolymer,amphiphilic diblock copolymer,and precursors into supramolecular micelles.Elongational dynamics of viscoelastic micelle solution together with fast solvent evaporation during electrospinning cause simultaneous close packing and uniaxial stretching of micelles,consequently producing polymer nanofibers consisting of oriented micelles.The method is versatile for the fabrication of large-scale ordered mesoporous nanofibers with adjustable pore diameter and various compositions such as carbon,SiO2,TiO2 and WO3.The aligned longitudinal mesopores connected side-by-side by tiny pores offer highly exposed active sites and expedite electron/ion transport.The assembled electrodes deliver outstanding performance for lithium metal batteries.
ordered mesoporous nanofiberselectrospinningoriented micelleslithium metal batteries
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Institute of Functional Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China
Institute for Conservation of Cultural Heritage,Shanghai University,Shanghai 200444,China
Frontiers Science Center for Transformative Molecules,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
Department of Materials Science,Fudan University,Shanghai 200433,China
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国家自然科学基金国家自然科学基金国家自然科学基金Innovation Program of Shanghai Municipal Education CommissionProgram for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning上海市自然科学基金the'Shuguang Program'supported by Shanghai Education Development Foundation and Shanghai Municipal Education CommissionFundamental Research Funds for the Central Universities and DHU Distinguished Young Professor Program
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