Fig. 2 shows a comparison of different battery technologies in terms of volumetric and gravimetric energy densities. In comparison, the zinc-nickel secondary battery, as another alkaline zinc-based battery, undergoes a reaction where Ni(OH) 2 is oxidized to NiOOH, with theoretical capacity values of 289 mAh g −1 and actual mass …
Learn MoreLow energy densities restrict the widespread applications of redox flow batteries. Herein, we report an alkaline Zn-Mn aqueous redox flow battery (ARFB) based on Zn(OH) 4 2-/Zn and MnO 4-/MnO 4 2-redox-pairs. The use of NaMnO 4 at high concentrations (up to 3.92 M) as the positive active material gives the ARFB a high …
Learn MoreWe demonstrate a long-lifetime, aqueous redox-flow battery that can operate at a pH as low as 12 while maintaining an open-circuit voltage of over 1 V. We functionalized 2,6-dihydroxyanthraquinone (2,6-DHAQ) with highly alkali-soluble carboxylate terminal groups.
Learn MoreFlow batteries permit more economical long-duration discharge than solid-electrode batteries by using liquid electrolytes stored …
Learn MoreMembrane transport properties are crucial for electrochemical devices, and these properties are influenced by the composition and concentration of the electrolyte in contact with the membrane. We apply this general membrane–electrolyte system approach to alkaline flow batteries, studying the conductivity and ferricyanide crossover of Nafion …
Learn MoreAs a result, PBI membranes demonstrate attractive performances in both acidic and alkaline flow batteries. A 3 kW vanadium flow battery (VFB) stack equipped with acid-doped PBI membranes showed an energy efficiency of 80% at a current density of 200 mA cm −2 and a stable efficiency for 500 cycles at the design power (3 kW).
Learn MoreIn addition to zinc-bromine flow batteries, the demonstrations of alkaline zinc-nickel flow batteries and alkaline zinc-iron flow batteries have also been reported. For instance, Damon E. Turney et al. at the City College of New York reported a 25-kWh alkaline zinc24
Learn MoreHere, combining the electrochemical reaction with the chemical reaction of ferro/ferricyanide couple in a homemade nickel electrode, an alkaline zinc-iron/nickel …
Learn MoreAn alkaline battery (IEC code: L) is a type of primary battery where the electrolyte (most commonly potassium hydroxide) has a pH value above 7. Typically these batteries derive energy from the reaction between zinc …
Learn MoreAn aqueous flow battery with inexpensive carbon electrodes, combining the quinone/hydroquinone couple with the Br 2 /Br − redox couple, yields a peak galvanic …
Learn MoreA simple-yet-elegant device, the modern alkaline battery has only a few main components. The difference in electron affinity between zinc (Zn) and manganese dioxide (MnO2) drives its basic reaction. Because the manganese dioxide has a greater attracting power for electrons, it creates a potential for electrical ...
Learn MoreAqueous redox flow batteries (ARFBs) based on the electrolyte solutions of redox-active organic molecules are very attractive for the application of large-scale electrochemical energy storage. We propose a high-performance ARFB system utilizing 2-hydroxy-3-carboxy-1,4-naphthoquinone (2,3-HCNQ) and K4Fe(CN)6 as the anolyte and …
Learn MoreZinc-based flow battery is an energy storage technology with good application prospects because of its advantages of abundant raw materials, low cost, and environmental friendliness. The chemical stability of zinc electrodes exposed to electrolyte is a very important issue for zinc-based batteries. This paper reports on details of chemical …
Learn MoreWe provide a proof of concept of a lithium battery configuration containing an aqueous cathode in a flow-through mode. A room-temperature, rechargeable alkali-ion battery with a commercially available Li +-ion …
Learn MoreWe developed this alkaline RFB as an alternative to state of the art RFBs, e.g., the all vanadium RFB, which are based on acidic electrolytes. 1 Acidic RFBs often suffer capacity fading due to membrane crossover and the occurrence of undesired secondary reactions during battery cycling (e.g., precipitation, evolution of H 2 and Cl 2 …
Learn MoreThe lithium-ion batteries that ushered in the wireless revolution rely on electrode strategies that are being stretched to power electric vehicles. Low-cost, safe electrical-energy storage that enables better use of alternative energy sources (e.g., wind, solar, and nuclear) requires an alternative strategy. We report a demonstration of the feasibility of a battery having a …
Learn MoreCurrently, lithium-ion batteries have dominated the energy storge market [3,4].However, issues related to the high cost [], limited reserves of lithium mineral resources [], and safety concerns arising from the use of flammable organic electrolytes in lithium-ion batteries cannot be ignored [7,8].].
Learn MoreAlkaline zinc–iron flow batteries (AZIFBs) demonstrate great potential in the field of stationary energy storage. However, the reliability of alkaline zinc–iron flow batteries is limited by dendritic zinc …
Learn MoreWe present the first alkaline redox flow battery (a-RFB) based on the coordination chemistry of cobalt with 1-[Bis(2-hydroxyethyl)amino]-2-propanol (mTEA) …
Learn MoreAs a necessary supplement to clean renewable energy, aqueous flow batteries have become one of the most promising next-generation energy storage and conversion devices because of their excellent safety, high efficiency, flexibility, low cost, and particular capability of being scaled severally in light of energy and power density. The …
Learn MoreAqueous organic-based flow batteries are increasingly receiving attention owing to their appealing traits of high safety and low cost. An economic and high-performance membrane is always regarded as the heart of the batteries. Here, we introduce a cost-effective, homemade porous membrane with high performance for alkaline …
Learn MoreWe demonstrate a rechargeable aqueous alkaline zinc–sulfur flow battery that comprises environmental materials zinc and sulfur as negative and positive active species. Meanwhile, a nickel-based electrode is also obtained by a two-step process to decrease the polarization of the sulfur redox reaction, thus greatly improving the voltage …
Learn MoreAlkaline all-iron ion redox flow batteries (RFBs) based on iron (III/II) complexes as redox pairs are considered promising devices for low-cost and large-scale energy storage. However, present alkaline all-iron ion RFBs suffer from the issue of capacity decay, and the deeper mechanisms are elusive.
Learn MoreAmong the reported aqueous flow batteries, zinc-based flow batteries and alkaline zinc–iron-based flow batteries, in particular, have triggered attention due to …
Learn MoreThe performance predictions of the present model were compared with experimental data from Yuan''s work using the same parameters at the current density of 60 mA cm −2 [27].As displayed in Fig. 2, a good agreement in voltages is observed with the maximum variation of 2.45% (Table S1), illustrating that the present model is able to …
Learn MoreAbstract. Redox flow batteries (RFBs) are membrane-separated rechargeable flow cells with redox electrolytes, offering the potential for large-scale …
Learn MoreFlow batteries based on alkaline-soluble dihydroxybenzoquinones and derivatives are promising candidates for large-scale, stationary storage of electrical energy. Conflict of Interest The authors declare no conflict of interest. Supporting Information References,,, ...
Learn MoreAs a bridge between anode and cathode, the electrolyte is an important part of the battery, providing a tunnel for ions transfer. Among the aqueous electrolytes, alkaline Zn–MnO 2 batteries, as commercialized aqueous zinc-based batteries, have relatively mature and stable technologies. ...
Learn MoreBased 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 …
Learn MoreFlow Batteries The premier reference on flow battery technology for large-scale, high-performance, and sustainable energy storage From basics to commercial applications, Flow Batteries covers the main aspects and recent developments of (Redox) Flow Batteries ...
Learn MoreSince its development in the 1970s, the rechargeable alkali-ion battery has proven to be a truly transformative technology, providing portable energy storage for devices ranging from small portable electronics to sizable electric vehicles. Here, we present a review of modern theoretical and computational approaches to the study and design of …
Learn MoreAlkaline flow batteries are attracting increasing attention for stationary energy storage. Very promising candidates have …
Learn MoreThus, the designed LDHs electrode enables the alkaline zinc-iron flow battery to maintain a voltage efficiency of 81.6% at an ultra-high current density of 320 mA cm −2, surpassing the values reported in previous studies. The …
Learn MoreThe utilization of redox-active organic species in aqueous redox flow batteries holds great promise for large-scale and sustainable energy storage. Herein, we report the low-temperature green synthesis of three different phenazine derivatives and investigate their performances in alkaline organic redox flow batteries. Electrochemical …
Learn MoreLow energy densities restrict the widespread applications of redox flow batteries. Herein, we report an alkaline Zn-Mn aqueous redox flow battery (ARFB) …
Learn MoreConsequently, the Cts-Cu-M membrane achieves high hydroxide ion conductivity with an area resistance of 0.17 Ω cm 2 and enables an alkaline zinc-based flow battery to operate at 320 mA cm −2, along with an energy efficiency of ≈80%.
Learn MoreAlkaline zinc-iron flow battery (AZIFB) is emerged as one of the cost-effective technologies for electrochemical energy storage application. A cost-effective ion-conducting membrane with high performance is very important for the battery. In this paper, a cost-effective ...
Learn MoreAlthough the AZSFB with alkaline negolyte is rechargeable, the value of VE is under 60% even at a low current density of 5 mA cm −2 could be known from CV that S has a sluggish kinetics with a peak potential separation of 512.1 mV (), which causes the low VE of the AZSFB.), which causes the low VE of the AZSFB.
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