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首页> 外文期刊>Advanced energy materials >Membranes with Well-Defined Selective Layer Regulated by Controlled Solvent Diffusion for High Power Density Flow Battery
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Membranes with Well-Defined Selective Layer Regulated by Controlled Solvent Diffusion for High Power Density Flow Battery

机译：具有通过受控溶剂扩散对高功率密度流电池调节良好定义的选择性层的膜

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摘要

Membranes with precise control of selective layer are designed and prepared by adjusting diffusion of solvents. Combining experiments and theoretical calculations, the formation mechanism of ion conductive membranes prepared by a non-solvent induced phase separation (NIPS) method is found to be related to internal diffusion flux of solvent to the non-solvent bath and external diffusion flux of non-solvent to the casting solution. By regulating the internal and external diffusion rates via a two-step NIPS method, a series of polybenzimidazole (PBI) porous membranes with independently controlled thin selective skin layers and highly porous support layers are fabricated, which achieve a simultaneous improvement in ion selectivity and proton conductivity. A vanadium flow battery assembled with a PBI membrane demonstrates an energy efficiency of 80% at a current density of 220 mA cm(-2), which is the highest value among the reported PBI membranes. This provides a simple and effective way to fabricate membranes with well-defined morphologies.
机译：通过调节溶剂的扩散来设计和制备精确控制选择性层的膜。结合实验和理论计算，发现通过非溶剂诱导的相分离（NIPS）法制备的离子导电膜的形成机制与溶剂的内部扩散通量与非溶剂浴和非溶剂浴的外部扩散通量有关。溶剂到浇铸溶液。通过通过两步NIPS法调节内部和外部扩散速率，制造一系列具有独立控制的薄选择性皮肤层和高度多孔支撑层的一系列聚苯苯胺唑（PBI）多孔膜，这达到了离子选择性和质子的同时改善电导率。与PBI膜组装的钒流量电池显示出电流密度为220mAcm（-2）的能量效率，这是报告的PBI膜中的最高值。这提供了一种简单有效的方法来制造具有明确定义的形态的膜。

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  • 来源
    《Advanced energy materials》 |2020年第34期|2001382.1-2001382.7|共7页
  • 作者

    Shi Mengqi; Dai Qing; Li Fan; Li Tianyu; Hou Guangjin; Zhang Huamin; Li Xianfeng;

  • 作者单位

    Chinese Acad Sci Dalian Inst Chem Phys Div Energy Storage Dalian Natl Lab Clean Energy DNL Dalian 116023 Peoples R China|Univ Chinese Acad Sci Sch Chem Engn Beijing 100049 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Div Energy Storage Dalian Natl Lab Clean Energy DNL Dalian 116023 Peoples R China|Univ Chinese Acad Sci Sch Chem Engn Beijing 100049 Peoples R China;

    Univ Chinese Acad Sci Sch Chem Engn Beijing 100049 Peoples R China|Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Div Energy Storage Dalian Natl Lab Clean Energy DNL Dalian 116023 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Div Energy Storage Dalian Natl Lab Clean Energy DNL Dalian 116023 Peoples R China;

    Chinese Acad Sci Dalian Inst Chem Phys Div Energy Storage Dalian Natl Lab Clean Energy DNL Dalian 116023 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    energy storage; flow batteries; membranes; selective transport channels;

    机译：储能金;流动电池;膜;选择性运输渠道;

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