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首页> 外文期刊>Advanced Functional Materials >Solvent-Induced Rearrangement of Ion-Transport Channels: A Way to Create Advanced Porous Membranes for Vanadium Flow Batteries
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Solvent-Induced Rearrangement of Ion-Transport Channels: A Way to Create Advanced Porous Membranes for Vanadium Flow Batteries

机译：溶剂诱导的离子迁移通道重排：一种为钒液流电池创建高级多孔膜的方法

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摘要

Porous membranes with critically hydrophobic/hydrophilic phase-separated-like structures for use in vanadium flow battery application are first realized by solvent-induced reassembly of a polymer blend system. Porous poly(ether sulfone) (PES)/sufonated poly(ether ether ketone) (SPEEK) blend membranes with tunable pore size are prepared via the phase inversion method. After solidification, isopropanol (IPA) is introduced to induce the reassembly of sulfonated groups and further form ion-transport channels by using the interaction between IPA and functional groups in SPEEK. As a result, a highly phase separated membrane structure is created, composed of a highly stable hydrophobic porous PES matrix and hydrophilic interconnected small pores. The charged pore walls are highly beneficial to improving proton conductivity, while pores are simultaneously shrunk during the IPA treatment. Therefore, the resultant membranes show an excellent battery performance with a coulombic efficiency exceeding 99%, along with an energy efficiency over 91%, which is among the highest values ever reported. This article supplies an ease-to-operate and efficient method to create membranes with controlled ion-transport channels.
机译：首先通过溶剂诱导的聚合物共混体系的重组，实现了用于钒液流电池的具有临界疏水/亲水相分离结构的多孔膜。通过相转化法制备了孔径可调的多孔聚醚砜（PES）/磺化聚醚醚酮（SPEEK）共混膜。固化后，引入异丙醇（IPA）来诱导磺化基团的重新组装，并利用SPEEK中IPA与官能团之间的相互作用进一步形成离子传输通道。结果，产生了高度相分离的膜结构，其由高度稳定的疏水性多孔PES基质和亲水性互连的小孔组成。带电的孔壁对改善质子传导性非常有利，而在IPA处理期间，孔同时收缩。因此，所得膜显示出优异的电池性能，库仑效率超过99％，能量效率超过91％，这是有史以来的最高值。本文提供了一种易于操作且有效的方法来制造具有受控离子传输通道的膜。

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  • 来源
    《Advanced Functional Materials》 |2017年第4期|1604587.1-1604587.9|共9页
  • 作者

    Lu Wenjing; Yuan Zhizhang; Li Mingrun; Li Xianfeng; Zhang Huamin; Vankelecom Ivo;

  • 作者单位

    Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China|Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100039, Peoples R China;

    Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China|Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100039, 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, Zhongshan Rd 457, Dalian 116023, Peoples R China|Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China;

    Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China|Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China;

    Katholieke Univ Leuven, Leuven Chem & Tech, Fac Biosci Engn, Ctr Surface Chem & Catalysis, Postbus 2461,Celestijnenlaan 200F, B-3001 Leuven, Belgium;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    high-performance porous membranes; ion-transport channels; phase separated structures; solvent-induced rearrangement; vanadium flow batteries;

    机译：高性能多孔膜;离子传输通道;相分离结构;溶剂诱导的重排;钒液流电池;

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