Zwitterionic interface engineering enables ultrathin composite membrane for high-rate vanadium flow battery

Zhang, Denghua; Zhang, Xihao; Luan, Chao; Zhang, Zhongyu; Pu, Nianwen; Zhang, Kaiyue; Liu, Jianguo; Yan, Chuanwei

doi:10.1016/j.ensm.2022.04.033

Cited by 21 publications

(4 citation statements)

References 57 publications

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“…The half-cell and full-cell RFBs were constructed with a neutral electrolyte (0.5 M Na 2 SO 4 as supporting electrolyte) or an acidic electrolyte (1 M H 2 SO 4 as supporting electrolyte) by sandwiching a Nafion 212 membrane or a homemade PBI membrane [36] with two pieces of carbon felt electrodes (1.5 × 1.5 cm). The circulation of the electrolyte was controlled by a peristaltic pump at a flow rate of 24.26 mL/min.…”

Section: Flow Battery Testsmentioning

confidence: 99%

Readily Accessible M-Ferrocenyl-Phenyl Sulfonate as Novel Cathodic Electrolyte for Aqueous Organic Redox Flow Batteries

Fang,

Zheng,

et al. 2023

Batteries

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Ferrocene derivatives are amongst the most promising electroactive organic electrolytes. The bottleneck problems of their application in aqueous redox flow batteries are their poor solubility and lower potential as well as the complexity of the modification methods to solve these problems. In this study, a benzenesulfonic acid group is easily introduced into the ferrocene structure by a mature diazotization reaction, and the synthesized sodium m-phenylferrocene sulfonate BASFc is used as the novel cathodic electroactive electrolyte for AORFB. The hydrophilicity and the electron-absorbing effect of the introduced benzenesulfonic group can effectively improve the water solubility and redox potential of ferrocene. Moreover, the introduction of phenyl extends the conjugated structure of ferrocene and increases its structural dimension, which may be conducive to reducing its membrane permeability and improving the structural stability to some extent. The physical structure and the electrochemical properties of BASFc are studied systematically; the feasibility of its application as a cathodic electrolyte in AORFBs is verified by assembling the half-cell and full-cell. The results verify the good electrochemical reaction kinetics of BASFc in acid electrolyte and the corresponding AORFB shows satisfactory efficiency and stability.

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Section: Flow Battery Testsmentioning

confidence: 99%

Readily Accessible M-Ferrocenyl-Phenyl Sulfonate as Novel Cathodic Electrolyte for Aqueous Organic Redox Flow Batteries

Fang,

Zheng,

et al. 2023

Batteries

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“…It is important to note, however, that porous and swollen PBI membranes may lead to higher levels of vanadium ion crossover. Depending on the morphology, that is, a homogenous, dense morphology with small or large free polymer volume, and, at large scales, interconnected pores or closed pores, optionally accompanied by the formation of a skin layer, the vanadium permeability increased to the order of magnitude of 10 −9 cm min −1 or higher 24,26,28,31 . Therefore, careful consideration of the membrane's morphology is necessary to balancing conductivity and ion selectivity in VRFB applications.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the morphology, that is, a homogenous, dense morphology with small or large free polymer volume, and, at large scales, interconnected pores or closed pores, optionally accompanied by the formation of a skin layer, the vanadium permeability increased to the order of magnitude of 10 −9 cm min −1 or higher. 24,26,28,31 Therefore, careful consideration of the membrane's morphology is necessary to balancing conductivity and ion selectivity in VRFB applications. For example, while a VRFB with a 40 µm thick poly[2,2′-m-(phenylene)−5,5′bibenzimidazole] (mPBI) membrane had Coulombic efficiency (CE) and VE of 100% and 78% (energy efficiency [EE] = 78%), respectively, a cell with a 270 µm thick PBI gel membrane had CE and VE of 88% and 95% (EE = 84%), respectively (both at 72 mA cm −2 ).…”

mentioning

confidence: 99%

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

Bui,

Shin,

Rahimi

et al. 2024

Carbon Energy

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A novel polybenzimidazole (PBI)‐based trilayer membrane assembly is developed for application in vanadium redox flow battery (VRFB). The membrane comprises a 1 µm thin cross‐linked poly[2,2′‐(p‐oxydiphenylene)−5,5′‐bibenzimidazole] (OPBI) sandwiched between two 20 µm 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 mΩ cm2, respectively. Contact with vanadium electrolyte increases the ASR of trilayer membrane only to 158 mΩ cm2, while that of Nafion is 193 mΩ cm2. VO2+ permeability is 2.73 × 10−9 cm2 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.

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“…Among the promising options, redox flow batteries (RFBs) stand out due to their high safety levels, long cycle life, and flexible design characteristics. − In comparison to other metal-based RFBs including Fe/Cr, Zn/I, Mn/S, and Zn/Fe, a vanadium flow battery (VFB) distinguishes itself by employing the same element in both half-cells, thereby completely mitigating the risk of cross-contamination. Recent advancements in key materials such as electrolytes, , membranes, − and bipolar plates have further propelled the development of VFBs, enabling successful demonstration projects at the MW scale.…”

Section: Introductionmentioning

confidence: 99%

Controlled Construction of a N-Doped Carbon Nanotube Network Endows Carbon Felt with Superior Performances for High-Rate Vanadium Flow Batteries

Zhang,

Wang,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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Developing carbon felt (CF) electrodes with sufficient mass transfer channels and highly active catalytic interfaces remains a great challenge for high-rate vanadium flow batteries (VFBs). Herein, a well-defined 3D hierarchical N-doped carbon nanotube (NCNT) network is designed and grown onto CF via a facile bottom-up strategy, which features a high bonding strength, controllable growth morphology, and tunable electron structure. In the strategy, ZIF-67 arrays as both precursors and catalysts are self-assembled on CF followed by decomposition of melamine as an initiator into C and N sources for controlled growth of NCNTs during pyrolysis. By precisely regulating the microstructure of ZIF-67 precursors and the usage amount of melamine, the NCNT-modified CF composite electrode simultaneously achieves fast electron transport, facile mass transport, and high catalytic performance toward VO 2+ /VO 2 + and V 2+ /V 3+ redox reactions. Electrostatic potential calculations further indicate that N dopants alter the electronic structure of CNTs and serve as the preferential sites for the adsorption of vanadium ions to promote the redox kinetics. Consequently, the battery assembled with the composite electrodes exhibits an impressive energy efficiency of 76.6% at 300 mA cm −2 and demonstrates prolonged stability throughout 550 consecutive charge−discharge cycles at 200 mA cm −2 . These encouraging achievements shed fresh insights into the controlled synthesis of CNTs onto CF for high-rate VFBs.

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Zwitterionic interface engineering enables ultrathin composite membrane for high-rate vanadium flow battery

Cited by 21 publications

References 57 publications

Readily Accessible M-Ferrocenyl-Phenyl Sulfonate as Novel Cathodic Electrolyte for Aqueous Organic Redox Flow Batteries

Readily Accessible M-Ferrocenyl-Phenyl Sulfonate as Novel Cathodic Electrolyte for Aqueous Organic Redox Flow Batteries

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

Controlled Construction of a N-Doped Carbon Nanotube Network Endows Carbon Felt with Superior Performances for High-Rate Vanadium Flow Batteries

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