Novel acid-base hybrid membrane based on amine-functionalized reduced graphene oxide and sulfonated polyimide for vanadium redox flow battery

Cao, Li; Sun, Qingqing; Gao, Yahui; Liu, Luntao; Shi, Haifeng

doi:10.1016/j.electacta.2015.01.159

Cited by 115 publications

(64 citation statements)

References 50 publications

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“…In an amphiphilic membrane, the penetration of vanadium ions can be effectively resisted by the cationic groups due to their Donnan exclusion effect, while the anionic groups (sulfonate groups) ensure the high conductivity of membranes. The results reported in the previous papers showed that the amphoteric membranes are good prospects for VRFB applications …”

Section: Introductionmentioning

confidence: 99%

Amphoteric Membranes Based on Sulfonated Polyether Ether Ketone and Imidazolium‐Functionalized Polyphenylene Oxide for Vanadium Redox Flow Battery Applications

Chu

et al. 2019

ChemElectroChem

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Amphoteric membranes were obtained from imidazoliumfunctionalized polyphenylene oxide (ImPPO) and sulfonated poly(ether ether ketone) (SPEEK) for an all-vanadium redox flow battery (VRFB) application. The SPEEK/ImPPO amphoteric membranes showed a considerably lower swelling degree and water uptake compared to those of pure SPEEK membranes, owing to the formation of ionic bonds between the cationic imidazolium groups of ImPPO and the anionic sulfonate groups of SPEEK. The cationic imidazolium groups of the ImPPO exhibited a Donnan exclusion effect on vanadium ions; therefore, the amphoteric membranes showed a much lower vanadium permeability than the pure SPEEK membrane. In addition, the vanadium permeability of the amphoteric membranes deceased with an increase in the ImPPO content. SPEEK-ImPPO20 with 20 wt% ImPPO showed a vanadium permeability of 0.43 × 10 À 9 cm 2 s À 1 at room temperature, which is 17 times lower than that of Nafion 212 (8 × 10 À 9 cm 2 s À 1 ). The VRFB assembled with SPEEK-ImPPO20 showed a coulombic efficiency of 97.2 % and a voltage efficiency of 85.8 % at a current density of 60 mA cm À 2 , whereas the values for Nafion 212 were 92.4 % and 86.7 % under the same conditions. In addition, the VRFB assembled with SPEEK-ImPPO20 exhibited much better capacity retention than that assembled with Nafion 212. These results indicate that the SPEEK-ImPPO amphoteric membrane is a promising material for VRFB applications.[a] Dr.

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Section: Introductionmentioning

confidence: 99%

Amphoteric Membranes Based on Sulfonated Polyether Ether Ketone and Imidazolium‐Functionalized Polyphenylene Oxide for Vanadium Redox Flow Battery Applications

Chu

et al. 2019

ChemElectroChem

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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%

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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“…An ideal membrane should have high proton conductivity as well as low vanadium‐ion permeability when applying in VRFB. Ion selectivity ( IS ) is considered as a parameter to evaluate the comprehensive performance of membrane, which is equal to the ratio of proton conductivity to vanadium‐ion permeability . The ion selectivities of l‐SPI, Fb‐SPI and Nafion 117 membranes are depicted in Figure .…”

Section: Resultsmentioning

confidence: 99%

Fluorine‐Containing Branched Sulfonated Polyimide Membrane for Vanadium Redox Flow Battery Applications

et al. 2018

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A series of fluorine‐containing branched sulfonated polyimide (Fb‐SPI) membranes with different degrees of branching (0–12 %) were synthesized through polycondensation. The chemical structure of Fb‐SPI‐10 membrane was confirmed using ATR‐FTIR and 1H NMR spectroscopy. The physico‐chemical properties of Fb‐SPI membranes were systematically investigated and compared to linear SPI (l‐SPI) and Nafion 117 membranes. The vanadium‐ion permeabilities of Fb‐SPI membranes (2.45–0.99×10−7 cm2 min−1) are much lower than that of Nafion 117 (17.1×10−7 cm2 min−1) membranes. Besides, the chemical stability of Fb‐SPI membranes is superior to that of l‐SPI membranes. During 500‐time continuous cyclic charge‐discharge measurements, the VRFB assembled with a Fb‐SPI‐10 membrane shows higher coulombic efficiency (98.4–99.7 %), higher or close energy efficiency (69.0–79.7 %) from 40 to 80 mA cm−2, and higher or close capacity retention (52.8–100 %) from 40 to 70 mA cm−2 compared with a device using a Nafion 117 membrane. All of these results demonstrate that the as‐selected Fb‐SPI‐10 membrane has promising potential for VRFB applications.

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Novel acid-base hybrid membrane based on amine-functionalized reduced graphene oxide and sulfonated polyimide for vanadium redox flow battery

Cited by 115 publications

References 50 publications

Amphoteric Membranes Based on Sulfonated Polyether Ether Ketone and Imidazolium‐Functionalized Polyphenylene Oxide for Vanadium Redox Flow Battery Applications

Amphoteric Membranes Based on Sulfonated Polyether Ether Ketone and Imidazolium‐Functionalized Polyphenylene Oxide for Vanadium Redox Flow Battery Applications

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

Fluorine‐Containing Branched Sulfonated Polyimide Membrane for Vanadium Redox Flow Battery Applications

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