Brain Capillary-Inspired Self-Assembled Covalent Organic Framework Membrane for Sodium–Sulfur Battery Separator

Sifan Chen; Lijun Liang; Yuanyuan LiDongyun WangJianguo LuXiaoli ZhanYang HouQinghua ZhangJun Lu

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Brain Capillary-Inspired Self-Assembled Covalent Organic Framework Membrane for Sodium–Sulfur Battery Separator

机译：Brain Capillary-Inspired Self-Assembled Covalent Organic Framework Membrane for Sodium–Sulfur Battery Separator

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Room-temperature sodium–sulfur (RT/Na–S) batteries are a promisinglow-cost energy storage technology. However, the vital role of the separatorin the system is often overlooked. Inspired by the maintenance of brainhomeostasis by human brain capillaries, this work pioneers a host–guest selfassembledstrategy for covalent organic scaffold membranes, endowing themembrane with multiple functions (sodium ion transport, confinement, andconversion of polysulfides) to maintain the stability of the RT/Na–S batterysystem. The free-standing multifunctional covalent organic framework membrane(HB/CNT@COF) maximizes the roles of the host framework and guestmolecules. Because of the synergistic effect of hydroxynaphthol blue (HB)and multiwalled carbon nanotubes (CNT), the HB/CNT@COF cell exhibitsa capacity of 733.4 mAh g~(?1) with limited capacity fading after 400 cycles at4 C. This performance is nearly four times that of commercial glass fiberseparators. Additionally, the cell demonstrates excellent performance underelectrolyte-poor conditions.

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来源
《Advanced energy materials》 |2023年第11期|2204334.1-2204334.8|共8页
作者
Sifan Chen; Lijun Liang; Yuanyuan LiDongyun WangJianguo LuXiaoli ZhanYang HouQinghua ZhangJun Lu;
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作者单位

College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027, China;

College of AutomationHangzhou Dianzi UniversityHangzhou 310000, China;

State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027, ChinaCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027, China,Quzhou Research InstituteZhejiang UniversityQuzhou 324000, China;

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正文语种英语
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battery separators; covalent organic frameworks; self-assembled membranes; sodium–sulfur batteries;

Brain Capillary-Inspired Self-Assembled Covalent Organic Framework Membrane for Sodium–Sulfur Battery Separator

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