A study of the Ce3+/Ce4+ redox couple in sulfamic acid for redox battery application

Xiong, Fang; Zhang, Zejie; Xie, Zhigang; Chen, Yunyang

doi:10.1016/j.apenergy.2012.05.021

Cited by 54 publications

(23 citation statements)

References 19 publications

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“…It ranges from 1.28 V in 1 M hydrochloric acid to 1.70 V in 1 M perchloric acid. 30 Sulfuric acid, nitric acid and MSA were studied as the common acidic media in the V-Ce RFB due to the variation in redox potentials expected. MSA is of interest due to its properties of being a "green" solvent and incurring reduced corrosion of electrode materials.…”

Section: V-ce Redox Ow Batterymentioning

confidence: 99%

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Renewable hydrogen generation from a dual-circuit redox flow battery

Amstutz

Toghill

Powlesland

et al. 2014

Energy Environ. Sci.

108

107

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Redox flow batteries (RFBs) are particularly well suited for storing the intermittent excess supply of renewable electricity, so-called "junk" electricity. Conventional RFBs are charged and discharged electrochemically, with electricity stored as chemical energy in the electrolytes. In the RFB system reported here, the electrolytes are conventionally charged but are then chemically discharged over catalytic beds in separate external circuits. The catalytic reaction of particular interest generates hydrogen gas as secondary energy storage. For demonstration, indirect water electrolysis was performed generating hydrogen and oxygen in separate catalytic reactions. The electrolyte containing V(II) was chemically discharged through proton reduction to hydrogen on a molybdenum carbide catalyst, whereas the electrolyte comprising Ce(IV) was similarly discharged in the oxidation of water to oxygen on a ruthenium dioxide catalyst. This approach is designed to complement electrochemical energy storage and may circumvent the low energy density of RFBs especially as hydrogen can be produced continuously whilst the RFB is charging. Broader contextRenewable energy technologies have evolved to deliver hundreds of terawatt hours of electricity, yet without its direct utilization in the grid part of that energy could be lost. In order to establish a thriving renewable energy economy it is of paramount importance that intermediate energy storage systems be developed. Mediating electricity production and usage will overcome the issues relating to intermittency, which presently limits widespread dependence on wind and photovoltaic power. Various approaches are under development, but no single approach is liable to address the issue as a whole. Combining technologies and hybridizing storage systems to adapt to a multifaceted energy future is the more viable option. This paper discusses one such hybrid system, in which electrochemical energy storage is combined with renewable hydrogen production, delivering a dual platform for energy storage as an electrochemical and chemical medium. † Electronic supplementary information (ESI) available: Charging and discharging curves, cyclic voltammetry, UV-vis spectra of V(II) and V(III), a picture of the cell, and details on the kinetics measurement and calculations. See

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Section: V-ce Redox Ow Batterymentioning

confidence: 99%

“…However, only a few studies on the V-Ce RFB have been reported, 25,[27][28][29][30] and opinion of the system is somewhat divided. However, only a few studies on the V-Ce RFB have been reported, 25,[27][28][29][30] and opinion of the system is somewhat divided.…”

Section: V-ce Redox Ow Batterymentioning

confidence: 99%

Renewable hydrogen generation from a dual-circuit redox flow battery

Amstutz

Toghill

Powlesland

et al. 2014

Energy Environ. Sci.

108

107

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“…Alternatives to MSA as supporting electrolytes have also been suggested. A Zn–Ce test cell with sulfamic acid media yielded a coulombic efficiency of 90 % 85. Xie et al.…”

Section: Cell Design and Performancementioning

confidence: 99%

The Development of Zn–Ce Hybrid Redox Flow Batteries for Energy Storage and Their Continuing Challenges

et al. 2014

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“…Its main advantages are a higher standard cell potential (2.48 V) and lower electrolyte toxicity than all-vanadium or Zn-Br 2 RFBs. Diverse electrode materials have been studied for both positive [3,4] and negative [5,6] electrode reactions as well as alternative electrolyte compositions [7][8][9][10]. The inhibition of hydrogen evolution as a secondary reaction, or via open-circuit corrosion, at the zinc negative electrode by electrolyte additives has also been considered [11].…”

Section: Introductionmentioning

confidence: 99%

Mass transport and active area of porous Pt/Ti electrodes for the Zn-Ce redox flow battery determined from limiting current measurements

Arenas

León

Walsh

2016

Electrochimica Acta

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The conversion of soluble cerium redox species in the zinc-cerium redox flow battery and other electrochemical processes can be carried out at planar and porous platinised titanium electrodes.The active area, current density, mass transfer coefficient and linear electrolyte flow velocity through these structures have a direct influence on the reaction yield and the relationship between cell potential and operational current density during charge and discharge of a flow battery. A quantitative and practical characterization of the reaction environment at these electrodes is required. The volumetric mass transfer coefficient, " $ has been calculated from limiting current measurements for Ce(IV) ion reduction in a laboratory, rectangular channel flow cell. This factor can be used to predict fractional conversion and required electrode dimensions. Highly porous platinised titanium felt shows superior " $ values and is wellsuited as a high performance electrode material.

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A study of the Ce3+/Ce4+ redox couple in sulfamic acid for redox battery application

Cited by 54 publications

References 19 publications

Renewable hydrogen generation from a dual-circuit redox flow battery

Renewable hydrogen generation from a dual-circuit redox flow battery

The Development of Zn–Ce Hybrid Redox Flow Batteries for Energy Storage and Their Continuing Challenges

Mass transport and active area of porous Pt/Ti electrodes for the Zn-Ce redox flow battery determined from limiting current measurements

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