Enhanced electrochemical performance of zinc/bromine redox flow battery with carbon-nanostructured felt generated by cobalt ions

Naresh, Raghu pandiyan; Surendran, Ammu; Ragupathy, P.; Dixon, Ditty

doi:10.1016/j.est.2022.104913

Cited by 19 publications

(14 citation statements)

References 43 publications

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“…The structural characteristics of the samples were confirmed using XRD (Figure 1(a)). Bare GF exhibited peaks at 2θ = 26 °and 43 °corresponding to graphitic carbon [26]. In contrast to bare GF, the ZGF samples exhibited peaks at 7.5 °, 10.5 °, 12.8 °, and 18.2 °.…”

Section: Resultsmentioning

confidence: 94%

Vanadium Redox Flow Battery Using an N-Doped Porous Carbon-Coated Positive Electrode Derived from Zeolitic Imidazolate Framework-8-Coated Graphite Felt

Kim,

Kang,

Kang

et al. 2024

International Journal of Energy Research

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The poor electrochemical activity and low wettability of graphite felt (GF) electrodes significantly limit the energy efficiency and power of vanadium redox flow batteries (VRFBs). To solve these problems, we developed an N-doped porous carbon-coated electrode by the carbonization of zeolitic imidazolate framework-8- (ZIF-8-) coated GF. By controlling the carbonization temperature, the effects of temperature on the structural morphology, pore structure, and amount and type of functional groups of the electrode were confirmed. In addition, the effect of the change in the pore structure and the amount and type of functional groups on the electrocatalytic activity for the vanadium redox reaction was demonstrated. The synthesized N-doped porous carbon-coated electrode, which showed the best electrochemical activity, had a sufficient amount of nitrogen functional groups with a high ratio of graphitic N and the highest surface area and pore volume among all the samples, providing abundant active sites for the VO2+/VO2+ redox reaction. The VRFB fabricated using prepared electrode exhibited energy and voltage efficiencies of 70.44% and 73.44%, respectively, at 200 mA cm-2, which were 11.77% and 11.08% higher than those of the bare GF electrode. Furthermore, the modified battery operated effectively at a high current density of 350 mA cm-2. The energy efficiency exhibited excellent stability over 500 charge/discharge cycles at 250 mA cm-2. Hence, this study presents a promising method for the development of high-performance VRFB electrodes.

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Section: Resultsmentioning

confidence: 94%

Vanadium Redox Flow Battery Using an N-Doped Porous Carbon-Coated Positive Electrode Derived from Zeolitic Imidazolate Framework-8-Coated Graphite Felt

Kim,

Kang,

Kang

et al. 2024

International Journal of Energy Research

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“…Besides, Dixon et al modified the GFs by using Co ions; it was expected that the well-aligned nanostructures as well as oxygen functional groups were formed on the electrode surface. 50,51 It is a transition metal-assisted thermal treatment that can facilitate better mass transport of the dense polybromide groups into the bulk of the electrode, leading to a better charge transfer between the polybromide and CFs. 52 Kim et al attempted to use the titanium-based mesh to replace the conventional polymer mesh as the electro-active material to impart versatile functionality, retaining the dimensional space upon deposition and stripping, and sufficient electrolyte diffusion at the anode side.…”

Section: Zinc-halogen Redox Flow Batterymentioning

confidence: 99%

Cathode materials for halide-based aqueous redox flow batteries: recent progress and future perspectives

Wang

Zhang

et al. 2023

Nanoscale

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“…Moreover, the use of the tribromide anion in the [Br 3 ] À /Br À redox pair as a mediator in dye-sensitized solar cells has been reported to be an efficient alternative to the frequently used [I 3 ] À /I À system (Kakiage et al, 2013). Poly-bromides have also been applied in zinc/bromine redox-flow batteries (Naresh et al, 2022).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structure of bis(3-carboxy-1-methylpyridinium) octabromide

Sirenko,

Naumova,

Golenya

et al. 2023

Acta Cryst E

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The crystal structure of the title salt, bis(3-carboxy-1-methylpyridinium) octabromide, 2C7H8NO2 +·Br8 2−, consists of 3-carboxy-1-methylpyridinium (N-methylnicotinic acid) cations, which are stacked between relatively rare [Br8]2– anions. The polybromide [Br8]2– anion has point group symmetry \overline{1} and can be described as being composed of two [Br3]− anions connected with a Br2 molecule in a Z-shaped manner. Contacts between neighboring octabromide anions ensure the creation of pseudo-polymeric chains propagating along [111]. The organic cations are located between anionic chains and are connected to each other through O—H...O hydrogen bonds and to the [Br8]2– anions through π...Br interactions that induce the creation of a supramolecular tri-periodic network. In addition, the presence of weak C—H...Br contacts leads to the creation of layers, which align parallel to (11\overline{2}).

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Enhanced electrochemical performance of zinc/bromine redox flow battery with carbon-nanostructured felt generated by cobalt ions

Cited by 19 publications

References 43 publications

Vanadium Redox Flow Battery Using an N-Doped Porous Carbon-Coated Positive Electrode Derived from Zeolitic Imidazolate Framework-8-Coated Graphite Felt

Vanadium Redox Flow Battery Using an N-Doped Porous Carbon-Coated Positive Electrode Derived from Zeolitic Imidazolate Framework-8-Coated Graphite Felt

Cathode materials for halide-based aqueous redox flow batteries: recent progress and future perspectives

Crystal structure of bis(3-carboxy-1-methylpyridinium) octabromide

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