Quaternary ammonium groups grafted polybenzimidazole membranes for vanadium redox flow battery applications

Ren, Xiaorui; Zhao, Lina; Che, Xuefu; Cai, Yuyang; Li, Yunqi; Li, Huanhuan; Chen, Hui; He, Hong; Liu, Jianguo; Yang, Jingshuai

doi:10.1016/j.jpowsour.2020.228037

Cited by 73 publications

(60 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transformation of the apparent species from quaternary ammonium to tertiary amine may be attributed to the electron transfer from electron‐rich sulfur species to electron‐deficient ammonium cations. [ 69 ] Presumably, the stable cationic EB‐COF can gain electrons from polysulfides and sulfur thus promote the redox reaction of polysulfides as an electron reservoir during the charge–discharge process.…”

Section: Methodsmentioning

confidence: 99%

Cationic Covalent‐Organic Framework as Efficient Redox Motor for High‐Performance Lithium–Sulfur Batteries

Liu

Chen

Wang

et al. 2020

Small

View full text Add to dashboard Cite

The shuttle effect of soluble lithium polysulfides (LiPSs) leads to the rapid decay of sulfur cathode, severely hindering the practical applications of lithium‐sulfur (Li‐S) batteries. To this point, a covalent‐organic framework (COF) with proper cationic sites, which can be utilized as the cathode host of high‐performance Li–S batteries, is reported. The chemical sulfur anchoring within micropores effectively suppresses the dissolution of LiPSs into the electrolyte. During the discharge step, the cationic sites can accept electrons from anode and deliver them to polysulfides to facilitate the polysulfides' disintegration. Meanwhile, the cationic sites can receive electrons from polysulfides and then send them to the anode during the charge process, which promotes the polysulfides oxidation. Thus, both experiments and computational modeling show that the cationic COF can effectively inhibit the shuttle effect of LiPSs and improve the batteries' performances. Compared with electrically neutral COFs, the cationic COF‐based batteries show much better cycling stability even at high current density, for instance, a high specific capacity of 468 mA h g−1 is retained after 300 cycles at a current density of 4.0 C.

show abstract

Section: Methodsmentioning

confidence: 99%

Cationic Covalent‐Organic Framework as Efficient Redox Motor for High‐Performance Lithium–Sulfur Batteries

Liu

Chen

Wang

et al. 2020

Small

View full text Add to dashboard Cite

show abstract

“…The SA doping of PTP-Qx membranes was performed by equilibrating the dry membranes in 3 mol L −1 SA solution at RT for two days [48,57,58]. The acid-doped membranes were dried in a vacuum oven at 80°C for 24 h. The acid doping content (ADC, %) was defined as the mass fraction of SA per gram of the sample and calculated according to Equation (1), where m 1 and m 2 are the weight before and after SA doping, respectively.…”

Section: Sa Doping and Swellingsmentioning

confidence: 99%

“…The VRFB was assembled and measured according to our previous work [48,59]. The CE, energy efficiency (EE, %), and VE of the cell were calculated according to Equations (3-5), respectively, where I is the current, V is the voltage, and t is the time, and subscripts d and c mean the discharge and charge process, respectively.…”

Section: Vrfb Performance and Cycling Durabilitymentioning

confidence: 99%

“…Recently, AEMs based on polymers without ether bonds in the main chain have attracted increasing attention in the AEM fuel cell [44], water electrolysis [45], and VRFB [46] communities. For example, similar to Lee et al [47], we have explored QAgrafted side-chain groups into polybenzimidazole (PBI) backbone (e.g., PBI-42% EPTMA) by adopting 2,3-epoxypropyltrimethylammonium chloride (EPTMA-Cl) as the grafting agent via the N-substitution reaction [48]. The obtained membranes displayed low vanadium permeability and enhanced VRFB efficiencies.…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

et al. 2021

Self Cite

View full text Add to dashboard Cite

“…The application of hydrocarbon (HC)‐type PEMs other than Nafion to VRFBs has recently been reported 19‐32 . Sun et al synthesized cationic and anion‐exchange membranes (AEM) with a phenylene backbone and found that the AEM had relatively high durability against V 5+ , and the performance of a VRFB constructed with AEM was comparable to that with Nafion 20 .…”

Section: Introductionmentioning

confidence: 99%

Application of high‐performance hydrocarbon‐type sulfonated polyethersulfone for vanadium redox‐flow battery

Ohira

Sakata²,

Ishida

et al. 2021

Int J Energy Res

View full text Add to dashboard Cite

Summary The application of hydrocarbon‐based polymer electrolyte membranes as an alternative to Nafion membranes for vanadium redox‐flow batteries (VRFBs) has been investigated. Ionic conductivity measurements and the crossover characteristics of vanadyl ions (VO2+), as well as durability testing against V5+ in H2SO4 solution, were performed to investigate the applicability of sulfonated poly(ethersulfone) (S‐PES) membranes with high molecular weight to VRFB. The diffusion coefficient of V4+ in S‐PES was lower than that in Nafion, and the ionic conductivity was comparable to that of Nafion in S‐PES with an ion‐exchange capacity (IEC) of 1.5 meq/g. A durability evaluation of V5+ with high oxidizing power indicated that it was extremely stable compared to the sulfonated poly(etheretherketone). It was clarified that by setting the IEC to an appropriately high value and reducing the membrane thickness, the membrane characteristics can be made comparable to those of Nafion. Finally, a VRFB test was performed using S‐PES with controlled IEC and membrane thickness, whereby the high molecular weight S‐PES was shown to have relatively good performance comparable to Nafion.

show abstract

Quaternary ammonium groups grafted polybenzimidazole membranes for vanadium redox flow battery applications

Cited by 73 publications

References 60 publications

Cationic Covalent‐Organic Framework as Efficient Redox Motor for High‐Performance Lithium–Sulfur Batteries

Cationic Covalent‐Organic Framework as Efficient Redox Motor for High‐Performance Lithium–Sulfur Batteries

Anion exchange membranes based on long side-chain quaternary ammonium-functionalized poly(arylene piperidinium)s for vanadium redox flow batteries

Application of high‐performance hydrocarbon‐type sulfonated polyethersulfone for vanadium redox‐flow battery

Contact Info

Product

Resources

About