Electrodeposition of iron(II) on platinum in chloride melts at 700–750°C

Lugovskoy, Alex; Zinigrad, Michael; Aurbach, Doron; Unger, Zeev

doi:10.1016/j.electacta.2008.10.016

Cited by 18 publications

(21 citation statements)

References 21 publications

(45 reference statements)

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“…However, it showed to be not very stable and was difficult to detect it [6,7,10]. But in some other studies iron (III) chloride was not detected at all [12,13,15,16]. Its absence has been attributed to instability/volatility of this compound [6].…”

Section: Introductionmentioning

confidence: 99%

“…In many studies, Fe (II) ions were generated by anodic dissolution of metallic iron at constant current (coulometry) [14,10]. On the other hand, it has been reported that the addition of anhydrous FeCl 3 leads to generation of stable Fe (III) ions [18] while other papers have shown that FeCl 3 .6H 2 O can serve as a source of bivalent iron [12][13]. In those two cases, where FeCl 3 was added to the melt [11,18], the reduction occurred in one single reversible step; Fe (III)/Fe (0).…”

Section: Introductionmentioning

confidence: 99%

“…Platinum has shown high reactivity towards iron ions; when it is used as substrate, alloying occurs and the Fe (II) reduction is far from reversible [6,12,16]. Other substrates such as tungsten, glassy carbon and molybdenum have shown inertness towards iron ions [6,11,[13][14][15][16][17] with one exception for tungsten [18].…”

Section: Introductionmentioning

confidence: 99%

“…This reaction may be catalysed by the electrode surface [6]. In addition, the electrode itself may participate in electrochemical reactions by alloying with iron and complicating reactions [12] or through oxidation and chemically reducing Fe (III) ions; the latter conceals electrochemical oxidation of Fe (II) to Fe (III) [20]. Composition of the melt also has an important effect [21].…”

Section: Introductionmentioning

confidence: 99%

“…These studies have been performed using different salt mixtures and substrate materials at different temperatures. Some of these electrolytes include KCl+LiCl [6][7][8][9][10], NaCl+KCl [11][12][13], ZnCl 2 +2NaCl [14,15], MgCl 2 +NaCl+KCl [16], AlCl 3 +NaCl [17], and NaCl [18].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Behaviour of Dissolved Iron Chloride in KCl+LiCl+NaCl Melt at 550ºC

et al. 2014

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An electrochemical study of iron was carried out in KCl+LiCl+NaCl melt at 550ºC using a glassy carbon working electrode. Cyclic voltammetry showed that the Fe (II)/Fe (0) electron exchange is a soluble/insoluble reversible process. Chronoamperometry studies suggested that the nucleation of metallic iron on glassy carbon electrode is instantaneous.The diffusion coefficient of Fe (II) was calculated using cyclic voltammetry; 1.4×10

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical Behaviour of Dissolved Iron Chloride in KCl+LiCl+NaCl Melt at 550ºC

et al. 2014

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Electrodeposition and Magnetic Characterization of Iron and Iron–Silicon Alloys from the Ionic Liquid 1‐Butyl‐1‐methylpyrrolidinium Trifluoromethylsulfonate

et al. 2014

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The electrodeposition of soft magnetic iron and iron-silicon alloys for magnetic measurements is presented. The preparation of these materials in 1-butyl-1-methylpyrrolidinium trifluoromethylsulfonate, [Py1,4]TfO, at 100 °C with FeCl2 and FeCl2 +SiCl4 was studied by using cyclic voltammetry. Constant-potential electrolysis was carried out to deposit either Fe or FeSi, and deposits of approximately 10 μm thicknesses were obtained. By using scanning electron microscopy and X-ray diffraction, the microstructure and crystallinity of the deposits were investigated. Grain sizes in the nanometer regime (50-80 nm) were found and the presence of iron-silicon alloys was verified. Frequency-dependent magnetic polarizations, coercive forces, and power losses of some deposits were determined by using a digital hysteresis recorder. Corresponding to the small grain sizes, the coercive forces are around 950-1150 A m(-1) and the power losses were at 6000 J m(-3), which is much higher than in commercial Fe(3.2 wt %)Si electrical steel. Below a polarization of 1.8 T, the power losses are mainly caused by domain wall movements and, above 1.8 T, by rotation of magnetic moments as well as domain wall annihilation and recreation.

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Electrolysis energy efficiency of highly concentrated FeCl2 solutions for power-to-solid energy storage technology

Luin

Valant

2022

J Solid State Electrochem

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An electrochemical cycle for the grid energy storage in the redox potential of Fe involves the electrolysis of a highly concentrated aqueous FeCl2 solution yielding solid iron deposits. For the high overall energy efficiency of the cycle, it is crucial to maximize the energy efficiency of the electrolysis process. Here we present a study of the influence of electrolysis parameters on the energy efficiency of such electrolysis, performed in an industrial-type electrolyzer. We studied the conductivity of the FeCl2 solution as a function of concentration and temperature and correlated it with the electrolysis energy efficiency. The deviation from the correlation indicated an important contribution from the conductivity of the ion-exchange membrane. Another important studied parameter was the applied current density. We quantitatively showed how the contribution of the resistance polarization increases with the current density, causing a decrease in overall energy efficiency. The highest energy efficiency of 89 ± 3% was achieved using 2.5 mol L−1 FeCl2 solution at 70 °C and a current density of 0.1 kA m−2. In terms of the energy input per Fe mass, this means 1.88 Wh g−1. The limiting energy input per mass of the Fe deposit was found to be 1.76 Wh g−1. Graphical abstract

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Electrodeposition of iron(II) on platinum in chloride melts at 700–750°C

Cited by 18 publications

References 21 publications

Electrochemical Behaviour of Dissolved Iron Chloride in KCl+LiCl+NaCl Melt at 550ºC

Electrochemical Behaviour of Dissolved Iron Chloride in KCl+LiCl+NaCl Melt at 550ºC

Electrodeposition and Magnetic Characterization of Iron and Iron–Silicon Alloys from the Ionic Liquid 1‐Butyl‐1‐methylpyrrolidinium Trifluoromethylsulfonate

Electrolysis energy efficiency of highly concentrated FeCl2 solutions for power-to-solid energy storage technology

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