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Huamin Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Thin-film composite membrane breaking the trade-off between conductivity and selectivity for a Flow Battery
    Nature communications, 2020
    Co-Authors: Qing Dai, Zhiqiang Liu, Ling Huang, Chao Wang, Yuyue Zhao, Anmin Zheng, Huamin Zhang
    Abstract:

    A membrane with both high ion conductivity and selectivity is critical to high power density and low-cost Flow batteries, which are of great importance for the wide application of renewable energies. The trade-off between ion selectivity and conductivity is a bottleneck of ion conductive membranes. In this paper, a thin-film composite membrane with ultrathin polyamide selective layer is found to break the trade-off between ion selectivity and conductivity, and dramatically improve the power density of a Flow Battery. As a result, a vanadium Flow Battery with a thin-film composite membrane achieves energy efficiency higher than 80% at a current density of 260 mA cm-2, which is the highest ever reported to the best of our knowledge. Combining experiments and theoretical calculation, we propose that the high performance is attributed to the proton transfer via Grotthuss mechanism and Vehicle mechanism in sub-1 nm pores of the ultrathin polyamide selective layer.

  • Progress and Perspectives of Flow Battery Technologies
    Electrochemical Energy Reviews, 2019
    Co-Authors: Huamin Zhang
    Abstract:

    Flow batteries have received increasing attention because of their ability to accelerate the utilization of renewable energy by resolving issues of discontinuity, instability and uncontrollability. Currently, widely studied Flow batteries include traditional vanadium and zinc-based Flow batteries as well as novel Flow Battery systems. And although vanadium and zinc-based Flow batteries are close to commercialization, relatively low power and energy densities restrict the further commercial and industrial application. To improve power and energy densities, researchers have started to investigate novel Flow Battery systems, including aqueous and non-aqueous systems. Here, novel non-aqueous Flow batteries possess low conductivity and low safety, limiting further application. Therefore, the most promising systems remain vanadium and zinc-based Flow batteries as well as novel aqueous Flow batteries. Overall, the research of Flow batteries should focus on improvements in power and energy density along with cost reductions. In addition, because the design and development of Flow Battery stacks are vital for industrialization, the structural design and optimization of key materials and stacks of Flow batteries are also important. Based on all of this, this review will present in detail the current progress and developmental perspectives of Flow batteries with a focus on vanadium Flow batteries, zinc-based Flow batteries and novel Flow Battery systems to provide an effective and extensive understanding of the current research and future development of Flow batteries.

  • Ion conducting membranes for aqueous Flow Battery systems.
    Chemical communications (Cambridge England), 2018
    Co-Authors: Zhizhang Yuan, Huamin Zhang
    Abstract:

    Flow batteries, aqueous Flow batteries in particular, are the most promising candidates for stationary energy storage to realize the wide utilization of renewable energy sources. To meet the requirement of large-scale energy storage, there has been a growing interest in aqueous Flow batteries, especially in novel redox couples and Flow-type systems. However, the development of aqueous Flow Battery technologies is at an early stage and their performance can be further improved. As a key component of a Flow Battery, the membrane has a significant effect on Battery performance. Currently, the membranes used in aqueous Flow Battery technologies are very limited. In this feature article, we first cover the application of porous membranes in vanadium Flow Battery technology, and then the membranes in most recently reported aqueous Flow Battery systems. Meanwhile, we hope that this feature article will inspire more efforts to design and prepare membranes with outstanding performance and stability, and then accelerate the development of Flow batteries for large scale energy storage applications.

  • Handbook of Clean Energy Systems - Flow Battery Technology
    Handbook of Clean Energy Systems, 2015
    Co-Authors: Huamin Zhang
    Abstract:

    Flow batteries are among the most promising devices for the large-scale energy storage owing to their attractive features like long cycle life, active thermal management, and independence of energy and power ratings. This article will give a detailed introduction on the research and development of Flow batteries including the fundamental electrochemistry, key materials, components, and systems. The challenge and prospective of Flow batteries will be briefly summarized. Keywords: electrochemical energy; Flow Battery; construction and classification; storage devices; future prospects

  • degradation mechanism of sulfonated poly ether ether ketone speek ion exchange membranes under vanadium Flow Battery medium
    Physical Chemistry Chemical Physics, 2014
    Co-Authors: Zhizhang Yuan, Wanxing Xu, Jinbo Hu, Xianfeng Li, Jingyu Cao, Huamin Zhang
    Abstract:

    The degradation mechanism of hydrocarbon ion exchange membranes under vanadium Flow Battery (VFB) medium was investigated and clarified for the first time. This work will be highly beneficial for improving the chemical stability of hydrocarbon ion exchange membranes, which is one of the most challenging issues for VFB application.

Wei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Analytical modeling for redox Flow Battery design
    Journal of Power Sources, 2021
    Co-Authors: Yunxiang Chen, Chao Wang, Jie Bao, Brian J. Koeppel, Litao Yan, Peiyuan Gao, Wei Wang
    Abstract:

    Abstract Deeper market penetration of redox Flow batteries requires optimization of the cell performance. Though important for performance optimization, detailed analytical solutions have not been developed for coupled electrolyte Flow, mass and charge transport of ions, and reaction kinetics within redox Flow batteries. To this end, this work presents analytical solutions to spatial variations of active species concentration and over-potential based on advection-diffusion transport for ions and Bulter-Volmer model for interface reaction kinetics. The solutions are validated with results from a finite element model and a calibrated zero-dimensional model. These solutions are then applied to investigate the relationship between over-potential and state of charge, current density, Flow velocity, standard reaction rate constant, diffusivity, total active species concentration, and electrode structure. Explicit formulas are identified for minimum activation over-potential and limiting current density as well as their dependence on electrolyte properties, operation conditions, and electrode structure. With our new mathematical formulas, this work provides a theoretical framework for Flow Battery design.

  • Material design and engineering of next-generation Flow-Battery technologies
    Nature Reviews Materials, 2016
    Co-Authors: Minjoon Park, Wei Wang
    Abstract:

    Flow-Battery technologies open a new age of large-scale electrical energy-storage systems. This Review highlights the latest innovative materials and their technical feasibility for next-generation Flow batteries. Spatial separation of the electrolyte and electrode is the main characteristic of Flow-Battery technologies, which liberates them from the constraints of overall energy content and the energy/power ratio. The concept of a Flowing electrolyte not only presents a cost-effective approach for large-scale energy storage, but has also recently been used to develop a wide range of new hybrid energy storage and conversion systems. The advent of Flow-based lithium-ion, organic redox-active materials, metal–air cells and photoelectrochemical batteries promises new opportunities for advanced electrical energy-storage technologies. In this Review, we present a critical overview of recent progress in conventional aqueous redox-Flow batteries and next-generation Flow batteries, highlighting the latest innovative alternative materials. We outline their technical feasibility for use in long-term and large-scale electrical energy-storage devices, as well as the limitations that need to be overcome, providing our view of promising future research directions in the field of redox-Flow batteries.

  • A High-Current, Stable Nonaqueous Organic Redox Flow Battery
    ACS Energy Letters, 2016
    Co-Authors: Xiaoliang Wei, Wentao Duan, Jinhua Huang, Lu Zhang, David Reed, Vincent L. Sprenkle, Wei Wang
    Abstract:

    Nonaqueous redox Flow batteries are promising in pursuit of high energy density storage systems owing to the broad voltage windows (>2 V) but currently are facing key challenges such as limited cyclability and rate performance. To address these technical hurdles, here we report the nonaqueous organic Flow Battery chemistry based on N-methylphthalimide anolyte and 2,5-di-tert-butyl-1-methoxy-4-[2′-methoxyethoxy]benzene catholyte, which harvests a theoretical cell voltage of 2.30 V. The redox Flow chemistry exhibits excellent cycling stability under both cyclic voltammetry and Flow cell tests upon repeated cycling. A series of Daramic and Celgard porous separators are evaluated in this organic Flow Battery, which enable the cells to be operated at greatly improved current densities as high as 50 mA cm–2 compared to those of other nonaqueous Flow systems. The stable cyclability and high-current operations of the organic Flow Battery system represent significant progress in the development of promising nonaqu...

  • a symmetric organic based nonaqueous redox Flow Battery and its state of charge diagnostics by ftir
    Journal of Materials Chemistry, 2016
    Co-Authors: Wentao Duan, Mohankumar Vijayakumar, Jarrod D Milshtein, Sydney Laramie, Rylan Dmello, Jinhua Huang, Rama Ses Vemuri, Dehong Hu, Lu Zhang, Wei Wang
    Abstract:

    Redox Flow batteries have shown outstanding promise for grid-scale energy storage to promote utilization of renewable energy and improve grid stability. Nonaqueous Battery systems can potentially achieve high energy density because of their broad voltage window. In this paper, we report a new organic redox-active material for use in a nonaqueous redox Flow Battery, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PTIO) that has high solubility (>2.6 M) in organic solvents. PTIO exhibits electrochemically reversible disproportionation reactions and thus can serve as both anolyte and catholyte redox materials in a symmetric Flow cell. The PTIO Flow Battery has a moderate cell voltage of ∼1.7 V and shows good cyclability under both cyclic voltammetry and Flow cell conditions. Moreover, we demonstrate that FTIR can offer accurate estimation of the PTIO concentration in electrolytes and determine the state of charge of the PTIO Flow cell, suggesting FTIR as a powerful online Battery status sensor. This study is expected to inspire more insights in this under-addressed area of state of charge analysis aiming at operational safety and reliability of Flow batteries.

  • ambipolar zinc polyiodide electrolyte for a high energy density aqueous redox Flow Battery
    Nature Communications, 2015
    Co-Authors: Zimin Nie, Jun Liu, Vincent L. Sprenkle, M Vijayakumar, Wei Wang
    Abstract:

    Conventional redox Flow batteries have low energy densities. Here the authors present an aqueous redox Flow Battery with an ambipolar and bifunctional zinc-polyiodide electrolyte, which exhibits an energy density approaching to that of lithium ion batteries.

Zong-xiao Yang - One of the best experts on this subject based on the ideXlab platform.

  • Recent progress in redox Flow Battery research and development
    Advanced Functional Materials, 2012
    Co-Authors: Wei Wang, Qingtao Luo, Xiaoliang Wei, Liyu Li, Zong-xiao Yang, Bin Li, Zhenguo Yang
    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.

  • A stable vanadium redox-Flow Battery with high energy density for large-scale energy storage
    Advanced Energy Materials, 2011
    Co-Authors: Liyu Li, Gordon Xia, Soowhan Kim, Gordon Graff, Guanguang Xia, Zimin Nie, Mohankumar Vijayakumar, Jian Zhi Hu, Junjun Zhang, Wei Wang, Jun Liu, Gordon L. Graff, Baowei Chen, Jianlu Zhang, Zong-xiao Yang
    Abstract:

    The all-vanadium redox Flow Battery is a promising technology for large-scale renewable and grid energy storage, but is limited by the low energy density and poor stability of the vanadium electrolyte solutions. A new vanadium redox Flow Battery with a significant improvement over the current technology is reported in this paper. This Battery uses sulfate-chloride mixed electrolytes, which are capable of dissolving 2.5 M vanadium, representing about a 70% increase in energy capacity over the current sulfate system. More importantly, the new electrolyte remains stable over a wide temperature range of -5 to 50 C, potentially eliminating the need for electrolyte temperature control in practical applications. This development would lead to a significant reduction in the cost of energy storage, thus accelerating its market penetration.

  • A new redox Flow Battery using Fe/V redox couples in chloride supporting electrolyte
    Energy & Environmental Science, 2011
    Co-Authors: Wei Wang, Gordon Xia, Soowhan Kim, M. Rychcik, Zimin Nie, Liyu Li, R G Robins, Zong-xiao Yang, Anthony Gordon Fane, Maria Skyllas-kazacos, M A Green, Junjun Zhang, Baowei Chen, E. Sum
    Abstract:

    A new redox Flow Battery using Fe2+/Fe3+ and V2+/V3+ redox couples in chloride-supporting electrolyte was proposed and investigated for potential stationary energy storage applications. The Fe/V redox Flow cell using mixed reactant solutions operated within a voltage window of 0.5–1.35 V with a nearly 100% utilization ratio and demonstrated stable cycling with energy efficiency around 80% at room temperature. Stable performance was also achieved in the temperature range between 0 °C and 50 °C. The improved stability and electrochemical activity over a broader temperature range over the current technologies (such as Fe/Cr redox chemistry) potentially eliminate the necessity of external heat management and use of catalysts, making the Fe/V redox Flow Battery a promising option as a stationary energy storage device to enable renewable integration and stabilization of the electrical grid.

Zhenguo Yang - One of the best experts on this subject based on the ideXlab platform.

  • fe v redox Flow Battery electrolyte investigation and optimization
    Journal of Power Sources, 2013
    Co-Authors: Wei Wang, Qingtao Luo, Zimin Nie, Xiaoliang Wei, Zhenguo Yang, Baowei Chen, Vincent L. Sprenkle
    Abstract:

    Abstract The recently invented iron (Fe)/vanadium (V) redox Flow Battery (IVB) system has attracted increasing attention because of its long-term cycling stability and low-cost membrane/separator. In this paper, we describe our extensive matrix study of factors such as electrolyte composition, state of charge (SOC), and temperature that influence the stability of electrolytes in both positive and negative half-cells. During the study, an optimized electrolyte that can be operated in a temperature range from −5 °C to 50 °C without precipitation is identified. Fe/V Flow cells using the optimized electrolyte and low-cost separator exhibit satisfactory cycling performance at different temperatures. Efficiencies, capacities, and energy densities of Flow batteries at various temperatures are studied.

  • anthraquinone with tailored structure for a nonaqueous metal organic redox Flow Battery
    Chemical Communications, 2012
    Co-Authors: Wei Wang, Lelia Cosimbescu, Daiwon Choi, Zhenguo Yang
    Abstract:

    A nonaqueous, hybrid metal–organic redox Flow Battery based on tailored anthraquinone structure is demonstrated to have an energy efficiency of ∼82% and a specific discharge energy density similar to those of aqueous redox Flow batteries, which is due to the significantly improved solubility of anthraquinone in supporting electrolytes.

  • Recent progress in redox Flow Battery research and development
    Advanced Functional Materials, 2012
    Co-Authors: Wei Wang, Qingtao Luo, Xiaoliang Wei, Liyu Li, Zong-xiao Yang, Bin Li, Zhenguo Yang
    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.

Maria Skyllas-kazacos - One of the best experts on this subject based on the ideXlab platform.

  • Studies on pressure losses and Flow rate optimization in vanadium redox Flow Battery
    Journal of Power Sources, 2014
    Co-Authors: Ao Tang, Maria Skyllas-kazacos
    Abstract:

    Abstract Premature voltage cut-off in the operation of the vanadium redox Flow Battery is largely associated with the rise in concentration overpotential at high state-of-charge (SOC) or state-of-discharge (SOD). The use of high constant volumetric Flow rate will reduce concentration overpotential, although potentially at the cost of consuming excessive pumping energy which in turn lowers system efficiency. On the other hand, any improper reduction in Flow rate will also limit the operating SOC and lead to deterioration in Battery efficiency. Pressure drop losses are further exacerbated by the need to reduce shunt currents in Flow Battery stacks that requires the use of long, narrow channels and manifolds. In this paper, the concentration overpotential is modelled as a function of Flow rate in an effort to determine an appropriate variable Flow rate that can yield high system efficiency, along with the analysis of pressure losses and total pumping energy. Simulation results for a 40-cell stack under pre-set voltage cut-off limits have shown that variable Flow rates are superior to constant Flow rates for the given system design and the use of a Flow factor of 7.5 with respect to the theoretical Flow rate can reach overall high system efficiencies for different charge–discharge operations.

  • Membranes for redox Flow Battery applications
    Membranes, 2012
    Co-Authors: Helen Prifti, Suminto Winardi, Tuti Mariana Lim, Ananthanarayanan Parasuraman, Maria Skyllas-kazacos
    Abstract:

    The need for large scale energy storage has become a priority to integrate renewable energy sources into the electricity grid. Redox Flow batteries are considered the best option to store electricity from medium to large scale applications. However, the current high cost of redox Flow batteries impedes the wide spread adoption of this technology. The membrane is a critical component of redox Flow batteries as it determines the performance as well as the economic viability of the batteries. The membrane acts as a separator to prevent cross-mixing of the positive and negative electrolytes, while still allowing the transport of ions to complete the circuit during the passage of current. An ideal membrane should have high ionic conductivity, low water intake and excellent chemical and thermal stability as well as good ionic exchange capacity. Developing a low cost, chemically stable membrane for redox Flow cell batteries has been a major focus for many groups around the world in recent years. This paper reviews the research work on membranes for redox Flow batteries, in particular for the all-vanadium redox Flow Battery which has received the most attention.

  • A new redox Flow Battery using Fe/V redox couples in chloride supporting electrolyte
    Energy & Environmental Science, 2011
    Co-Authors: Wei Wang, Gordon Xia, Soowhan Kim, M. Rychcik, Zimin Nie, Liyu Li, R G Robins, Zong-xiao Yang, Anthony Gordon Fane, Maria Skyllas-kazacos, M A Green, Junjun Zhang, Baowei Chen, E. Sum
    Abstract:

    A new redox Flow Battery using Fe2+/Fe3+ and V2+/V3+ redox couples in chloride-supporting electrolyte was proposed and investigated for potential stationary energy storage applications. The Fe/V redox Flow cell using mixed reactant solutions operated within a voltage window of 0.5–1.35 V with a nearly 100% utilization ratio and demonstrated stable cycling with energy efficiency around 80% at room temperature. Stable performance was also achieved in the temperature range between 0 °C and 50 °C. The improved stability and electrochemical activity over a broader temperature range over the current technologies (such as Fe/Cr redox chemistry) potentially eliminate the necessity of external heat management and use of catalysts, making the Fe/V redox Flow Battery a promising option as a stationary energy storage device to enable renewable integration and stabilization of the electrical grid.