Active Carbon Modified by Rhenium Species as a Perspective Supercapacitor Electrode

Ciszewski, Mateusz; Koszorek, A.; Hawełek, ᴌ.; Osadnik, Małgorzata; Szleper, Katarzyna; Drzazga, Michał

doi:10.3390/electrochem1030018

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…These groups, including oxides and oxo-hydroxides of tungsten, molybdenum, and rhenium were marginally examined. Combination of active carbon with ammonium perrhenate allowed to produce an electrode material with an enhanced specific capacitance around 60F/g [7]. Similar results were obtained by reacting multiwalled carbon nanotubes with potassium permanganate and ammonium perrhenate [8].…”

Section: Introductionsupporting

confidence: 68%

Mechanically homogenized expanded graphite/ cobalt(II) rhenate(VII) – Co(ReO4)2, as electrodes in hybrid symmetric supercapacitors

Ciszewski,

Pianowska,

Malarz

et al. 2024

Preprint

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Mechanically homogenized composite of expanded graphite and cobalt(II) rhenate(VII) has been described. Cobalt(II) rhenate(VII) was obtained in a reaction of perrhenic acid with cobalt(II) nitrate. A simple mortar homogenization method was used to enhance intercalation of cobalt species within carbon matrix. The specific capacity of composite was enhanced by 50% in comparison to bare expanded graphite. The electrochemical characteristic was significantly improved including better cyclability, lower resistance of electrode material, lower iR drop, with respect to expanded graphite without cobalt(II) rhenate(VII) active species. Expanded graphite with its unique specific surface area and pore size diameter was proved as potential and cheap carbon support.

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Section: Introductionsupporting

confidence: 68%

Mechanically homogenized expanded graphite/ cobalt(II) rhenate(VII) – Co(ReO4)2, as electrodes in hybrid symmetric supercapacitors

Ciszewski,

Pianowska,

Malarz

et al. 2024

Preprint

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“…It is difficult to make an exact prediction about the possible application areas of Re–C nanodispersed materials prepared by thermolysis at this stage of research. Such composites can be excellent materials for supercapacitor electrodes, catalysts, or gas sensors …”

Section: Resultsmentioning

confidence: 99%

“…It is difficult to make an exact prediction about the possible application areas of Re−C nanodispersed materials prepared by thermolysis at this stage of research. Such composites can be excellent materials for supercapacitor electrodes, 30 catalysts, or gas sensors. 31 In contrast to compounds I and III, no cubic phase was found after annealing Re−C nanocomposites at 1073−1673 K. Rhenium crystallized in a hexagonal lattice.…”

Section: Synthesis Of Hexamethyleneiminium Pertechnetate (Compound Ii...mentioning

confidence: 99%

Route to Stabilization of Nanotechnetium in an Amorphous Carbon Matrix: Preparative Methods, XAFS Evidence, and Electrochemical Studies

Kuznetsov,

German,

Nagovitsyna

et al. 2023

Inorg. Chem.

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Technetium–carbon nanophases are obtained by thermal decomposition of pertechnetates with large organic cations under an argon atmosphere. Parallel carbonization of organic cations (hexamethyleneiminium and triphenylguanidinium), which occurs during the thermal decomposition of their pertechnetates, leads to the formation of X-ray amorphous solid products. An X-ray absorption fine structure study revealed that they have a crystal structure containing technetium–carbon bonds with a length of 1.76 Å. After subsequent annealing treatment at 1073–1673 K, the synthesized technetium–carbon phase has a cubic lattice with an a of 4.01 ± 0.03 Å. The products of thermal decomposition of the same perrhenates are also X-ray amorphous; however, unlike that of pertechnetates, the distance between rhenium and carbon atoms in them is significantly greater (2.14 Å). After subsequent annealing, they have a hexagonal lattice. The electrochemical properties of technetium–carbon nanophases prepared by thermal decomposition of pertechnetates with large organic cations are different from the properties of those prepared with metallic technetium. The oxidation of technetium carbide to its oxides at the electrode surface observed in the first anodic scan of cyclic voltammograms can be used for the deposition of noble metal nanoclusters under open-circuit conditions to prepare composite catalysts for the hydrogen evolution reaction. Nanotechnetium in the amorphous carbon matrix can also be a prospective material for reactor transmutation of technetium to stable isotopically pure ruthenium-100.

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“…Another interesting metal for supercapacitors is rhenium oxide, a metal belonging to the manganese group that has several oxidation states as manganese. In particular, it was shown in [34] that rhenium-modified activated carbon (AC) showed high values of specific capacitance (57 F/g at a discharge current of 0.2 A/g) and cyclic stability (more than 800 charge/discharge cycles). Nevertheless, it was shown in [35] that the co-deposition of manganese and rhenium oxide on the AC surface leads to a significant improvement in the catalytic properties of such a composite material.…”

Section: Introductionmentioning

confidence: 99%

Composite Based on Multi-Walled Carbon Nanotubes and Manganese Oxide with Rhenium Additive for Supercapacitors: Structural and Electrochemical Studies

Корусенко

Несов

2022

Applied Sciences

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The structure and electrochemical characteristics of composites based on multi-walled carbon nanotubes (MWCNTs) and manganese oxide with the addition of rhenium oxide has been studied. It has shown that the decorating of the MWCNT surface with layers or nanoparticles of manganese oxide (Mn(III) + Mn(IV)) provides more than a twofold increase in the value of the specific capacitance at low potential scan rates. However, composites based only on manganese oxide exhibit poor electrochemical behavior and the value of the specific capacitance decreases rapidly with increasing potential scan rate due to the limitation of diffusion processes. The addition of rhenium oxide to composites significantly increases their electrochemical properties due to changes in the chemical composition and morphology of composites. Studies of the structure and chemical state have shown that an improvement in the specific capacitance is provided by increasing in the proportion of Mn(IV) oxide in such composites, which has the ability to rapidly and completely reverse redox reactions and has lower electrical resistance values, compared to Mn(III) oxide. A detailed analysis of the voltammetric data showed that an increase in the rate capability in composites with the addition of rhenium oxide can also be provided by increasing the availability of the electrode surface for electrolyte ions and increasing the amount of charge stored due to the formation of a double electric layer.

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Active Carbon Modified by Rhenium Species as a Perspective Supercapacitor Electrode

Cited by 4 publications

References 15 publications

Mechanically homogenized expanded graphite/ cobalt(II) rhenate(VII) – Co(ReO4)2, as electrodes in hybrid symmetric supercapacitors

Mechanically homogenized expanded graphite/ cobalt(II) rhenate(VII) – Co(ReO4)2, as electrodes in hybrid symmetric supercapacitors

Route to Stabilization of Nanotechnetium in an Amorphous Carbon Matrix: Preparative Methods, XAFS Evidence, and Electrochemical Studies

Composite Based on Multi-Walled Carbon Nanotubes and Manganese Oxide with Rhenium Additive for Supercapacitors: Structural and Electrochemical Studies

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