High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery
01 Nov 2016-Vol. 13, Iss: 4, pp 041005
About: The article was published on 2016-11-01. It has received 13 citations till now. The article focuses on the topics: Flow battery & Vanadium.
Citations
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TL;DR: Vanadium redox flow batteries (VRFBs) are one of the emerging energy storage techniques being developed with the purpose of effectively storing renewable energy as mentioned in this paper, and there are currently a limited number of papers published addressing the design considerations of the VRFB, the limitations of each component and what has been/is being done to address said limitations.
Abstract: Interest in the advancement of energy storage methods have risen as energy production trends toward renewable energy sources. Vanadium redox flow batteries (VRFB) are one of the emerging energy storage techniques being developed with the purpose of effectively storing renewable energy. There are currently a limited number of papers published addressing the design considerations of the VRFB, the limitations of each component and what has been/is being done to address said limitations. This review briefly discusses the current need and state of renewable energy production, the fundamental principles behind the VRFB, how it works and the technology restraints. The working principles of each component are highlighted and what design aspects/cues are to be considered when building a VRFB. The limiting determinants of some components are investigated along with the past/current research to address these limitations. Finally, critical research areas are highlighted along with future development recommendations.
315 citations
TL;DR: A techno-economic framework is developed that incorporates a physical model of capacity fade and recovery from rebalancing and other servicing methods into a levelized cost of storage (LCOS) metric and is expected to provide new insights into the cost-drivers for VRFBs and motivate further research efforts in understudied yet important areas.
66 citations
TL;DR: A commercial porous polyvinylidene fluoride membrane (pore size 0.65μm, nominally 125 μm) is spray coated with 1.2-4´μm layers of polybenzimidazole as mentioned in this paper.
52 citations
Cites result from "High Energy Efficiency With Low-Pre..."
...In comparison to literature data, the EE of the VRFB using PVDF-P20 (positive side) is high.[36] The EE of a porous ab-PBI membrane was reported to be 87% at 40 mA cm, but the practically linear decrease of the EE in that work allows to predict an EE of just 79% at 80 mA cm....
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TL;DR: In this paper, a flip-flop directional split serpentine flow field is proposed to reduce pressure drop by splitting the flow field into segments and improving electrochemical performance by quick evacuation of reaction products.
32 citations
TL;DR: In this paper, the optimal performance condition for vanadium redox flow battery cells was derived for the case where the local convective velocity in the electrode is the same and is of the order of Reynolds number 2, and a model was developed to determine the optimal electrolyte circulation rate for a given cell size and operating current density.
Abstract: Sufficient convective velocity in the electrode is essential for the good performance of a flow battery. The present study is concerned with identifying how this condition is attainable for a given size of a vanadium redox flow battery cell. To this end, detailed experimental investigations of fluid dynamic and electrochemical characteristics with serpentine flow fields have been done in cells with active area of 416, 918 and 1495 cm2, and optimal operating conditions of reasonably high efficiency, discharge capacity and energy density have been identified for each size. Investigations using calibrated computational fluid dynamics simulations show that optimal performance condition for each cell size corresponds to the case where the local convective velocity in the electrode is the same and is of the order of Reynolds number ~2. Based on this condition, a model has been developed to determine the optimal electrolyte circulation rate for a given cell size and operating current density.
22 citations
References
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TL;DR: In this article, the components of RFBs with a focus on understanding the underlying physical processes are examined and various transport and kinetic phenomena are discussed along with the most common redox couples.
Abstract: Redox flow batteries (RFBs) are enjoying a renaissance due to their ability to store large amounts of electrical energy relatively cheaply and efficiently. In this review, we examine the components of RFBs with a focus on understanding the underlying physical processes. The various transport and kinetic phenomena are discussed along with the most common redox couples.
1,661 citations
TL;DR: In this article, a review of recent progress in the research and development of redox flow battery technology, including cell-level components of electrolytes, electrodes, and membranes, is reviewed.
Abstract: With the increasing need to seamlessly integrate renewable energy with the current electricity grid, which itself is evolving into a more intelligent, efficient, and capable electrical power system, it is envisioned that energy-storage systems will play a more prominent role in bridging the gap between current technology and a clean sustainable future in grid reliability and utilization. Redox flow battery technology is a leading approach in providing a well-balanced solution for current challenges. Here, recent progress in the research and development of redox flow battery technology, including cell-level components of electrolytes, electrodes, and membranes, is reviewed. The focus is on new redox chemistries for both aqueous and non-aqueous systems.
1,216 citations
04 Jun 2012
928 citations
TL;DR: The need for grid-connected energy storage systems will grow worldwide in the next future due to the expansion of intermittent renewable energy sources and the inherent request for services of power quality and energy management as discussed by the authors.
Abstract: The need for grid-connected energy storage systems will grow worldwide in the next future due to the expansion of intermittent renewable energy sources and the inherent request for services of power quality and energy management. Electrochemical storage systems will be a solution of choice in many applications because of their localization flexibility, efficiency, scalability, and other appealing features. Among them redox flow batteries (RFBs) exhibit very high potential for several reasons, including power/energy independent sizing, high efficiency, room temperature operation, and extremely long charge/discharge cycle life. RFB technologies make use of different metal ion couples as reacting species. The best-researched and already commercially exploited types are all-vanadium redox batteries, but several research programs on other redox couples are underway in a number of countries. These programs aim at achieving major improvements resulting in more compact and cheaper systems, which can take the technology to a real breakthrough in stationary grid-connected applications.
847 citations
TL;DR: In this paper, a vanadium redox flow battery with a peak power density of 557mW cm −2 at a state of charge of 60% was demonstrated with a zero-gap flow field cell architecture and non-wetproofed carbon paper electrodes.
429 citations