Recent advances in electrospun carbon fiber electrode for vanadium redox flow battery: Properties, structures, and perspectives

Cheng, Dixuan; Li, Yuehua; Zhang, Jinliang; Tian, Mengran; Wang, Boyun; He, Zhangxing; Dai, Lei

doi:10.1016/j.carbon.2020.08.058

Cited by 69 publications

(27 citation statements)

References 128 publications

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“… 74 , 75 , 73 Therefore, the development of feasible electrode materials with (1) high electrical conductivity, 79 − 81 which limits the ohmic polarization; 79 − 81 (2) high surface area with abundant catalytic sites for VRFB redox reactions (i.e., VO 2+ /VO 2 + and V 2+ /V 3+ at the positive and negative electrodes, respectively); 78 − 81 and (3) hydrophilicity, which provides an optimal electrochemical accessibility of the redox-active materials to the electrode surface, is a research hotspot. 82 Nowadays, graphitic materials, in particular graphite felts (GFs), are regularly used as electrodes for commercial VRFBs 83 − 87 due to their low-cost manufacturing, 88 excellent electrical conductivity, 89 , 90 electrochemical stability, 89 , 85 and optimal hydraulic permeability. 89 , 89 , 91 However, their insufficient electrochemical activity toward the VRFB redox reactions 92 , 93 and low surface area (<1 m 2 g –1 ) 89 , 90 severely limit the voltage efficiency (VE) and, thus, the overall EE of the VRFBs.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments

et al. 2021

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The development of high-power density vanadium redox flow batteries (VRFBs) with high energy efficiencies (EEs) is crucial for the widespread dissemination of this energy storage technology. In this work, we report the production of novel hierarchical carbonaceous nanomaterials for VRFB electrodes with high catalytic activity toward the vanadium redox reactions (VO 2+ /VO 2 + and V 2+ /V 3+ ). The electrode materials are produced through a rapid (minute timescale) low-pressure combined gas plasma treatment of graphite felts (GFs) in an inductively coupled radio frequency reactor. By systematically studying the effects of either pure gases (O 2 and N 2 ) or their combination at different gas plasma pressures, the electrodes are optimized to reduce their kinetic polarization for the VRFB redox reactions. To further enhance the catalytic surface area of the electrodes, single-/few-layer graphene, produced by highly scalable wet-jet milling exfoliation of graphite, is incorporated into the GFs through an infiltration method in the presence of a polymeric binder. Depending on the thickness of the proton-exchange membrane (Nafion 115 or Nafion XL), our optimized VRFB configurations can efficiently operate within a wide range of charge/discharge current densities, exhibiting energy efficiencies up to 93.9%, 90.8%, 88.3%, 85.6%, 77.6%, and 69.5% at 25, 50, 75, 100, 200, and 300 mA cm –2 , respectively. Our technology is cost-competitive when compared to commercial ones (additional electrode costs < 100 € m –2 ) and shows EEs rivalling the record-high values reported for efficient systems to date. Our work remarks on the importance to study modified plasma conditions or plasma methods alternative to those reported previously (e.g., atmospheric plasmas) to improve further the electrode performances of the current VRFB systems.

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Section: Introductionmentioning

confidence: 99%

Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments

et al. 2021

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“…VRFBs are mainly composed of electrolytes, ion exchange membranes, and electrodes (Jiang et al, 2021b ). The positive and negative electrolytes are composed of

/VO 2+ and V 2+ /V 3+ solutions, respectively (Cheng D. et al, 2020 ). The proton exchange membrane prevents electrolyte cross-contamination and proton transfer.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Catalysis of SnO2-CNTs Composite for VO2+/VO2+ and V2+/V3+ Redox Reactions

et al. 2021

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In this study, a SnO2-carbon nanotube (SnO2-CNT) composite as a catalyst for vanadium redox flow battery (VRFB) was prepared using a sol-gel method. The effects of this composite on the electrochemical performance of VO2+/VO2+, and on the V2+/V3+ redox reactions and VRFB performance were investigated. The SnO2-CNT composite has better catalytic activity than pure SnO2 and CNT due to the synergistic catalysis of SnO2 and the CNT. SnO2 mainly provides the catalytic active sites and the CNTs mainly provide the three-dimensional structure and high electrical conductivity. Therefore, the SnO2-CNT composite has a larger specific surface area and an excellent synergistic catalytic performance. For cell performance, it was found that the SnO2-CNT cell shows a greater discharge capacity and energy efficiency. In particular, at 150 mA cm−2, the discharge capacity of the SnO2-CNT cell is 28.6 mAh higher than that of the pristine cell. The energy efficiency of the modified cell (7%) is 7.2% higher than that of the pristine cell (62.8%). This study shows that the SnO2-CNT is an efficient and promising catalyst for VRFB.

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“…Modern industrial civilization and economic society have a growing demand for electrical energy [1][2][3]. Developing electrochemical energy storage devices such as the rechargeable battery is the key to overcoming global energy challenges [4]. The most widely studied electrochemical rechargeable batteries are lithium-ion batteries [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Recent advances and perspectives on vanadium- and manganese-based cathode materials for aqueous zinc ion batteries

Liu

et al. 2021

Journal of Energy Chemistry

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174

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Recent advances in electrospun carbon fiber electrode for vanadium redox flow battery: Properties, structures, and perspectives

Cited by 69 publications

References 128 publications

Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments

Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments

Synergistic Catalysis of SnO2-CNTs Composite for VO2+/VO2+ and V2+/V3+ Redox Reactions

Recent advances and perspectives on vanadium- and manganese-based cathode materials for aqueous zinc ion batteries

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