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Implications of electrode modifications in aqueous organic redox flow batteries

Journal of Energy Chemistry 2024年第8期95卷 499-510,I0011页

作者： Zahid Manzoor Bhat Mohammad Furquan Muhammad Aurang Zeb Gul Sial Umair Alam Atif Saeed Alzahrani Mohammad Qamar Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management(IRC-HTCM) King Fahd University of Petroleum&Minerals(KFUPM)Dhahran 31261Saudi Arabia Department of Materials Science and Engineering King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Interdisciplinary Research Center for Sustainable Energy Systems(IRC-SES) King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Aqueous organic redox flow batteries(RFBs)exhibit favorable characteristics,such as tunability,multielectron transfer capability,and stability of the redox active molecules utilized as anolytes and catholytes,making them very viable contenders for large-scale grid storage *** attention has been paid on the development of efficient redox-active molecules and their performance optimization through chemical substitutions at various places on the backbone as part of the pursuit for high-performance *** the fact that electrodes are vital to optimal performance,they have not garnered significant *** research has been conducted on the effects of electrode modifications to improve the performance of *** primary emphasis has been given on the impact of electrode engineering to augment the efficiency of aqueous organic *** overview of electron transfer at the electrode-electrolyte interface is *** implications of electrode modification on the performance of redox flow batteries,with a particular focus on the anodic and cathodic half-cells separately,are then *** each section,significant discrepancies surrounding the effects of electrode engineering are thoroughly examined and ***,we have presented a comprehensive assessment along with our perspectives on the future trajectory.

关键词： redox flow batteries Electrode modification Organic redox molecules Outer sphere and inner sphere

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Organized macro-scale membrane size reduction in vanadium redox flow batteries:Part *** concept

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Journal of Energy Chemistry 2023年第6期81卷 64-70,I0003页

作者： Abdulmonem Fetyan Bronston P.Benetho Musbaudeen O.Bamgbopa Research&Development Centre Dubai Electricity and Water Authority(DEWA)P.O.Box 564DubaiUnited Arab Emirates

The high costs of the currently used membranes in vanadium redox flow batteries(VRFBs)contribute to the price of the vanadium redox flow battery systems and therefore limit the market share of the *** we report a detailed simulation and experimental studies on the effect of membrane reduction of single-cell *** simulated designs demonstrate that a proposed centred and double-strip membrane coverage showed a promising *** charge-discharge profile of different membrane size reduction,which showed good agreement with simulated data,suggests that the membrane size can comfortably be reduced by up to 20%without severe efficiency or discharge capacity ***-term cycling of 80%centred membrane coverage showed improved capacity retention during the latter cycles with almost 1%difference in capacity and only 2%in energy efficiency when compared to the fully covered-membrane *** results hold great promise for the development of cheap RFB stacks and facilitate the way to develop new cell designs with non-overlapping electrodes ***,giving more flexibility to improve the overall performance of the system.

关键词： Membrane reduction Electrodes overlapping Cell-Architecture Multiphysics simulation redox flow batteries

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Towards high power density aqueous redox flow batteries

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Nano Research Energy 2023年第1期2卷 71-87页

作者： Mengqi Gao Zhiyu Wang Dao Gen Lek Qing Wang Department of Materials Science and Engineering College of Design and EngineeringNational University of Singapore117574Singapore Institute of Materials Research and Engineering(IMRE) Agency for Science Technology and Research(A*STAR)138632Singapore

With the increasing penetration of renewable energy sources in the past decades,stationary energy storage technologies are critically desired for storing electricity generated by non-dispatchable energy sources to mitigate its impact on power *** flow batteries(RFBs)stand out among these technologies due to their salient features for large-scale energy *** primary obstacle to the successful industrialization and broad deployment of RFBs is now their high capital costs.A feasible route to cost reduction is to develop high-power RFBs,since the increase in power performance has a pronounced impact on the cost of RFB *** this review,an in-depth inspection of the power performance of RFBs is *** for the future development of high-power RFBs along with implementable strategies addressing both the intrinsic and extrinsic limiting factors are summarized,which are expected to provide useful references steering the further improvement in the power density of RFBs.

关键词： redox flow batteries power density aqueous electrolytes redox kinetics polarizations

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Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices:A review

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Journal of Energy Chemistry 2021年第8期30卷 492-529,I0011页

作者： Yue Wen Matt D.R.Kok Jorge Pavel Victoria Tafoya Ana BJorge Sobrido Ellsworth Bell Jeff T.Gostick Servann Herou Philipp Schlee Maria-Magdalena Titirici Dan J.L.Brett Paul R.Shearing Rhodri Jervis The Electrochemical Innovation Lab Dept.of Chemical EngineeringUniversity College LondonTorrington PlaceWC1E 7JE LondonUK Queen Mary University of London School of Engineering and Materials ScienceMile End RoadE14NS LondonUK Department of Chemical Engineering University of WaterlooWaterlooCanada Department of Chemical Engineering Imperial College LondonSouth Kensington CampusSW72AZ LondonUK

Electrospinning has been proven as a highly versatile fabrication method for producing nano-structured fibres with controllable morphology,of both the fibres themselves and the void structure of the ***,it is possible to use heteroatom doped polymers or to include catalytic precursors in the electrospinning solution to control the surface properties of the *** factors make it an ideal method for the production of electrodes and flow media for a variety of electrochemical devices,enabling reduction in mass transport and activation overpotentials and therefore increasing ***,the use of biomass as a polymer source has recently gained attention for the ability to embed sustainable principles in the materials of electrochemical devices,complementing their ability to allow an increase in the use of renewable electricity via their *** this review,the historical and recent developments of electrospun materials for application in redox flow batteries,fuel cells,metal air batteries and supercapacitors are thoroughly reviewed,including an overview of the electrospinning process and a guide to best ***,we provide an outlook for the emerging use of this process in the field of electrochemical energy devices with the hope that the combination of tailored microstructure,surface functionality and computer modelling will herald a new era of bespoke functional materials that can significantly improve the performance of the devices in which they are used.

关键词： Electrospinning redox flow batteries Fuel cells Metal-air batteries Supercapacitors

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Electrode modification and electrocatalysis for redox flow battery(RFB) applications

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储能科学与技术 2015年第5期4卷 433-457页

作者： CAO Liuyue SKYLLAS-KAZACOS Maria WANG Dawei School of Chemical Engineering The University of New South Wales

The electrode is one of the main components in redox flow batteries(RFBs), as it provides the reactions sites for redox couples and can influence the cell performance through its effect on cell voltage losses associated with activation overpotential, concentration overpotential and ohmic losses. Extensive research has thus been carried out on material selection, structural design and modification of electrodes as well as electrocatalysis for redox reactions. This review provides an historical overview of the screening and modification of electrode materials together with recent progress in novel electrode architectures, electrode modification and electrocatalysis methods. RFB systems such as iron/chromium, polysulfide/bromine and all vanadium batteries are discussed in detail.

关键词： redox flow batteries electrode catalysis carbon graphite felt

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