Proton delivery through a dynamic 3D H-bond network constructed from dense hydroxyls for advanced ion-selective membranes

文献情報

出版日 2019-05-24

DOI 10.1039/C9TA04423J

インパクトファクター 12.732

著者

Lei Hu, Li Gao, Wenji Zheng, Yan Dai, Ce Hao, Xuemei Wu

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要旨

An advanced ion-selective membrane containing a dynamic hydroxyl-based 3D H-bond network is first proposed for improved efficiencies and stability in flow battery applications. The 3D H-bond network structure is constructed by the nanoscale aggregation of hydrophilic dense-hydroxyl side chains anchored to hydrophobic polybenzimidazole. This unique dynamic H-bond network creates proton transport highways as well as vanadium permeation barriers across the membrane, leading to an ultralow vanadium ion permeability (<10−9 cm2 s−1) and remarkably low area resistance (0.32 Ω cm−2). This membrane exhibits high coulombic efficiencies (CE: 98.0–99.2%) and energy efficiencies (EE: 88.9–77.9%) at high current densities (80–200 mA cm−2), together with a long lifetime of over 800 cycles (about 42 days) at 120 mA cm−2 in vanadium flow batteries. The design of dynamic 3D H-bond networks provides a promising strategy for the development of highly ion-selective and stable membranes for flow battery application.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Proton delivery through a dynamic 3D H-bond network constructed from dense hydroxyls for advanced ion-selective membranes

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Journal of Materials Chemistry A

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