微波合成Zr-MOF-NH2及Nafion复合质子交换膜的制备与性能
Preparation and properties of Zr-MOF-NH2 and doped Nafion composite proton exchange membranes synthesized by microwaves
高倩 1张柳杰 1张辉 1徐靖凯 1肖伟 1李莹1
作者信息
- 1. 辽宁石油化工大学 石油化工学院,抚顺 113001
- 折叠
摘要
全钒液流电池要求质子交换膜具备优良的离子选择性和理化稳定性.本研究分别采用微波法和传统水热法制备UIO-66-NH2,利用浇筑法制备了 UIO-66-NH2/Nafion复合质子交换膜,对膜的理化性质和电池性能进行系统研究.结果表明,UIO-66-NH2在复合膜内形成的氢键网络、酸碱对和自身孔道协同强化了膜的离子选择性.基于微波法(M/N)和传统水热法(T/N)的复合膜综合性能均优于纯树脂膜(P-N).在掺杂量为3wt％时,M/N-3膜拉伸强度达到27 MPa,质子传导率和钒离子透过率分别为122.18 mS·cm-1和0.83× 10-7 cm2·min-1,离子选择性为15.6×105 S·min.cm-3,约为P-N膜的30倍,且其电池能量效率达到83.8％～71.7％(100～200 mA.cm-2),优于 T/N-3 膜(82.7％～71.0％)和 P-N 膜(79.4％～69.0％).同时,该电池也显示出更优的循环稳定性和容量保持率.因此,微波法合成的UIO-66-NH2可有效改善质子交换膜的综合性能,在提高钒液流电池性能方面前景较好.
Abstract
Vanadium liquid flow batteries require proton exchange membranes with excellent ion selectivity and physicochemical stability.In this work,UIO-66-NH2 was prepared by microwave and traditional hydrothermal method,respectively,and UIO-66-NH2/Nafion composite proton exchange membranes were prepared by the cas-ting method,and the physicochemical properties of the membranes and the cell performance were systematically characterized.The results show that the hydrogen bonding network formed by UIO-66-NH2 within the composite membrane,acid-base pairs and its own pore size synergistically strengthened the ion selectivity of the composite membrane.The comprehensive performance of the composite membranes base on both microwave(M/N)and traditional hydrothermal(T/N)methods is superior to that of the pure resin membrane(P-N).At the addition amount of 3wt％,the tensile strength of the M/N-3 membrane reaches 27 MPa,the proton conductivity and vanadium ion permeability are 122.18 mS·cm-1 and 0.83×10-7 cm2·min-1,respectively,and the ion selectivity is 15.6×105 S·min·cm-3,which is about 30 times of that of the P-N membrane,and the cell energy efficiency of this membrane reaches 83.8％-71.7％(100-200 mA·cm-2),which is superior to T/N-3 membrane(82.7％-71.0％)and P-N membrane(79.4％-69.0％).The cell also shows superior cycling stability and capacity retention.Therefore,UIO-66-NH2 synthesized by microwave method can effectively improve the comprehensive performance of proton exchange membranes,which is promising in optimizing the performance of vanadium liquid flow batteries.
关键词
钒液流电池/质子交换膜/微波法/金属-有机框架/离子选择性Key words
vanadium liquid flow battery/proton exchange membrane/microwave method/metal-organic framework/ion selectivity引用本文复制引用
基金项目
辽宁省自然科学基金(2022-KF-13-05)
辽宁省教育厅面上项目(LJK0411)
抚顺市"抚顺英才计划"项目(FSYC202107010)
出版年
2024
NETL
NSTL
万方数据