Highly efficient vanadium redox flow batteries enabled by a trilayer polybenzimidazole membrane assembly

被引：5

作者：

Bui, Trung Tuyen ^{[1
]}

Shin, Mingyu ^{[2
]}

Rahimi, Mohammad ^{[3
]}

Bentien, Anders ^{[3
]}

Kwon, Yongchai ^{[2
,7
]}

Henkensmeier, Dirk ^{[1
,4
,5
,6
]}

机构：

[1] Korea Inst Sci & Technol KIST, Hydrogen Fuel Cell Res Ctr, Seoul, South Korea

[2] Seoul Natl Univ Sci & Technol, Dept Chem & Biomol Engn, Seoul, South Korea

[3] Aarhus Univ, Dept Biol & Chem Engn, Aarhus, Denmark

[4] Univ Sci & Technol, KIST Sch, Div Energy & Environm Technol, Seoul, South Korea

[5] Korea Univ, Grad Sch Energy & Environm, Seoul, South Korea

[6] Korea Inst Sci & Technol KIST, Hydrogen Fuel Cell Res Ctr, Seoul 02792, South Korea

[7] Seoul Natl Univ Sci & Technol, Dept Chem & Biomol Engn, 232 Gongneung ro, Seoul 01811, South Korea

来源：

CARBON ENERGY | 2024年 / 6卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

polybenzimidazole; porous membrane; proton conductivity; trilayer; VRFBs; PROTON-EXCHANGE MEMBRANES; CONDUCTIVITY; PERFORMANCE; DEGRADATION; STABILITY; MECHANISM; SOLVENT; STORAGE; ENERGY;

D O I：

10.1002/cey2.473

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel polybenzimidazole (PBI)-based trilayer membrane assembly is developed for application in vanadium redox flow battery (VRFB). The membrane comprises a 1 mu m thin cross-linked poly[2,2'-(p-oxydiphenylene)-5,5'-bibenzimidazole] (OPBI) sandwiched between two 20 mu m thick porous OPBI membranes (p-OPBI) without further lamination steps. The trilayer membrane demonstrates exceptional properties, such as high conductivity and low area-specific resistance (ASR) of 51 mS cm(-1) and 81 m Omega cm(2), respectively. Contact with vanadium electrolyte increases the ASR of trilayer membrane only to 158 m Omega cm(2), while that of Nafion is 193 m Omega cm(2). VO2+ permeability is 2.73 x 10(-9) cm(2) min(-1), about 150 times lower than that of Nafion NR212. In addition, the membrane has high mechanical strength and high chemical stability against VO2+. In VRFB, the combination of low resistance and low vanadium permeability results in excellent performance, revealing high Coulombic efficiency (>99%), high energy efficiency (EE; 90.8% at current density of 80 mA cm(-2)), and long-term durability. The EE is one of the best reported to date.

引用

页数：14