Branched sulfonated polyimide/functionalized silicon carbide composite membranes with improved chemical stabilities and proton selectivities for vanadium redox flow battery application

Zhang, Yaping; Pu, Yang; Pan, Yang; Yang, Hongyan; Xuan, Sensen; Long, Jun; Wang, Yanlin; Zhang, Hongping

doi:10.1007/s10853-018-2620-x

Cited by 44 publications

(17 citation statements)

References 42 publications

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“…This is mainly because that 3.0 mol L −1 H 2 SO 4 solution contains more freely moveable H + compared to DI water. The comparison of the proton conductivities of SPI‐based composite membranes is presented in Table S3 . The proton conductivity of bSPI/s‐MC‐20 % composite membrane is superior to those of most of reported SPI‐based composite membranes for VRFBs, which is very close to that of Nafion 115 membrane.…”

Section: Resultsmentioning

confidence: 83%

“…The comparison of the proton conductivities of SPI-based composite membranes is presented in Table S3. [19][20][21][22][33][34][35][36][37][38][39] The proton conductivity of bSPI/s-MC-20 % composite membrane is superior to those of most of reported SPI-based composite membranes for VRFBs, which is very close to that of Nafion 115 membrane.…”

Section: Proton Conductivity Vanadium Ion Permeability and Proton Sementioning

confidence: 99%

“…[18] However, the proton conductivity of this bSPI membrane is still lower than that of Nafion membrane. According to the literatures, [19][20][21][22] the inorganic or organic materials could be introduced into SPI polymers by blending to prepare SPI-based composite membranes with improved proton conductivities and excellent VRFB performance.…”

Section: Introductionmentioning

confidence: 99%

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Branched Sulfonated Polyimide/Sulfonated Methylcellulose Composite Membranes with Remarkable Proton Conductivity and Selectivity for Vanadium Redox Flow Batteries

et al. 2020

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A series of branched sulfonated polyimide (bSPI)/sulfonated methylcellulose (s‐MC) composite membranes composed of a designed and synthesized bSPI polymer and functionalized s‐MC are prepared by using a facile solution casting method for vanadium redox flow batteries (VRFBs). Among all bSPI/s‐MC composite membranes, the optimized bSPI/s‐MC‐20 % composite membrane has the best proton selectivity of 2.45×105 S min cm−3, which is 14.4 times as high as the Nafion 115 membrane. The bSPI/s‐MC‐20 % composite membrane possesses superior proton conductivity compared to most reported SPI‐based composite membranes for VRFBs. The VRFB with a bSPI/s‐MC‐20 % composite membrane shows excellent battery efficiencies (CE=99.2–98.0 %, EE=66.3–77.6 %) and capacity retention (73.3–47.2 %). Moreover, the cost of the bSPI/s‐MC‐20 % composite membrane is only a quarter of that of a commercial Nafion 115 membrane. This work develops a new strategy to fabricate cheap bSPI‐based composite membranes by introducing a suitable functionalized biomass material.

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Section: Resultsmentioning

confidence: 83%

Section: Proton Conductivity Vanadium Ion Permeability and Proton Sementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Branched Sulfonated Polyimide/Sulfonated Methylcellulose Composite Membranes with Remarkable Proton Conductivity and Selectivity for Vanadium Redox Flow Batteries

et al. 2020

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“…Composite membranes with GO and its derivatives have become one of the best approaches to overcome the issues of vanadium ion selectivity of the membrane in VRFB. Nafion membrane undoubtedly has supreme chemical and stability towards vanadium electrolytes [23]. Although it has excellent stability, this membrane suffers a lot from very high vanadium permeability.…”

Section: Go-modified Membranes For Vrfbmentioning

confidence: 99%

“…Other than Nafion, sulfonated aromatic polymers or non-perfluorinated polymers can also be considered as one of the potential membranes for VRFB applications. For instance, sulfonated poly(ether ether ketone) (SPEEK) [28,29], sulfonated poly(arylene ether ketone) [30], and sulfonated polyimide (SPI) [23,31] have gained interest from researchers to act as membranes in VRFB due to their high ionic conductivity, good mechanical properties, and lower cost compared to Nafion [29,32,33]. In the case of sulfonated aromatic polymers, the degree of sulfonation (DS) determines the properties of each membrane.…”

Section: Samplesmentioning

confidence: 99%

GO-modified membranes for vanadium redox flow battery

et al. 2019

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Graphene oxide (GO) has attracted tremendous attention in membrane-based separation field as it can filter ions and molecules. Recently, GO-based materials have emerged as excellent modifiers for vanadium redox flow battery (VRFB) application. Its high mechanical and chemical stability, nearly frictionless surface, high flexibility, and low cost make GO-based materials as proper materials for the membranes in VRFB. In VRFB, a membrane acts as the key component to determine the performance. Therefore, employing low vanadium ion permeability with excellent stability membrane in vanadium electrolytes is important to ensure high battery performance. Herein, recent progress of GO-modified membranes for VRFB is briefly reviewed. This review begins with current membranes used for VRFB, followed by the challenges faced by the membranes. In addition, the transport mechanism of vanadium ion and the stability properties of GO-modified membranes are also discussed to enlighten the role of GO in the modified membranes.

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Zr‐MOF‐Enabled Controllable Ion Sieving and Proton Conductivity in Flow Battery Membrane

Zhang

et al. 2021

Adv Funct Materials

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Membrane with ordered channels is the key to controlling ion sieving and proton conductivity in flow batteries. However, it remains a great challenge for finely controlling the nanochannels of polymeric membranes. Herein, two types of acid-stable Zr-metal organic framework (MOF-801 and MOF-808) with variable pore structures and channel properties are introduced as fillers into a non-fluorinated sulfonated poly (ether ether ketone) (SPEEK). The membrane incorporated with MOF-801 of a smaller triangular window (≈3.5 Å) successfully translates the molecular sieving property into the flow battery membrane, resulting in enhanced coulombic efficiency (98.5-99.2%) at 40-120 mA cm −2 compared with the pristine SPEEK membrane (97.1-98.5%). In contrast, more protophilic internal interconnected channels of MOF-808 yield faster proton highway, leading to a significant increase of voltage efficiency (93.7-84.1%) at 40-120 mA cm −2 compared with the pristine SPEEK membrane (91.7-78.9%). By regulating the ion sieving and proton conductivity, MOF-801/MOF-808 binary composite membrane exhibits synchronously improved performance in the vanadium redox flow battery system. The revealed structure-property relationship in the Zr-MOFs-based membranes provides a general guideline to design new proton exchange membranes with ordered channels for flow battery application.

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Branched sulfonated polyimide/functionalized silicon carbide composite membranes with improved chemical stabilities and proton selectivities for vanadium redox flow battery application

Cited by 44 publications

References 42 publications

Branched Sulfonated Polyimide/Sulfonated Methylcellulose Composite Membranes with Remarkable Proton Conductivity and Selectivity for Vanadium Redox Flow Batteries

Branched Sulfonated Polyimide/Sulfonated Methylcellulose Composite Membranes with Remarkable Proton Conductivity and Selectivity for Vanadium Redox Flow Batteries

GO-modified membranes for vanadium redox flow battery

Zr‐MOF‐Enabled Controllable Ion Sieving and Proton Conductivity in Flow Battery Membrane

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