当前位置: X-MOL 学术ChemPlusChem › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A Composite Membrane Based on Sulfonated Polystyrene Implanted in a Stretched PTFE Film for Vanadium Flow Batteries
ChemPlusChem ( IF 3.4 ) Pub Date : 2020-10-22 , DOI: 10.1002/cplu.202000618
Nataliya A. Gvozdik 1 , Evgeny A. Sanginov 2 , Lilia Z. Abunaeva 3, 4 , Dmirty V. Konev 2 , Andrey A. Usenko 2 , Ksenia S. Novikova 2 , Keith J. Stevenson 1 , Yury A. Dobrovolsky 2
Affiliation  

The quality of ion‐selective membranes determines the efficiency of Vanadium Flow Batteries (VFBs), and alternatives to expensive Nafion™ materials are actively being searched for. One of the membrane architecture approaches is to imitate the Nafion™ structure with two separate phases: a conductive sulfonated polymer and an inner matrix. We introduce a new composite material based on sulfonated styrene polymerized inside the pores of a stretched PTFE matrix. Variation of polystyrene content and a sulfonation degree allowed to obtain membranes with IEC from to 0.96 to 1.84 mmol/g. Balanced vanadium permeability (ca. 5.5 ⋅ 10−6 cm2/min) and proton conductivity (ca. 50 mS/cm) were achieved for the material with 21–23 % polystyrene content and a sulfonation degree up to 94 %. Membranes showed stable cycling with 81 % energy efficiency in a single‐cell VFB. This work contributes to the existing knowledge of Nafion alternatives by providing a cheap and scalable method of membrane production.

中文翻译:

基于磺化聚苯乙烯的复合膜植入用于流动电池的PTFE拉伸薄膜中

离子选择膜的质量决定了钒液流电池(VFB)的效率,并且正在积极寻找昂贵的Nafion™材料的替代品。膜体系结构方法之一是通过两个独立的相来模仿Nafion™结构:导电的磺化聚合物和内部基质。我们介绍一种基于磺化苯乙烯的新型复合材料,该材料在拉伸的PTFE基质的孔内聚合。聚苯乙烯含量和磺化度的变化使得获得的膜的IEC值为0.96-1.84 mmol / g。平衡的钒渗透性(约5.5⋅10 -6  cm 2聚苯乙烯含量为21-23%,磺化度最高为94%的材料,质子传导率(约50 mS / cm)得以实现。在单电池VFB中,膜显示出稳定的循环,能量效率为81%。这项工作通过提供一种廉价且可扩展的膜生产方法,为Nafion替代品的现有知识做出了贡献。
更新日期:2020-12-02
down
wechat
bug