Effect of the MoS2 surface layer on the kinetics of intercalation processes in the NaFe(SO4)2/C composite

Kokhmetova, Saule; Kan, Tatyana; Malchik, Fyodor; Galeyeva, Alina; Djenizian, Thierry; Kurbatov, Andrey

doi:10.1016/j.mtcomm.2021.102723

Cited by 4 publications

(10 citation statements)

References 35 publications

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“…The previously discovered dependence of the gravimetric capacity in a galvanostatic discharge on the time of mixing of the cathode material with conductive agent (carbon) 14 clearly indicates a strong effect of the uniformity of the distribution of material particles with carbon particles and, accordingly, the influence of average number of particles' contacts with carbon on the intercalation degree of the material.…”

Section: Resultsmentioning

confidence: 90%

“…Electrochemical studies were performed in 1 M NaClO 4 in propylene carbonate electrolyte with 10% fluorinated ethylene carbonate (FEC), with sodium metal reference electrode. In work [14], the weight ratio of NaFe(SO 4 ) 2, Carbon black and polyvinylidenefluoride is 70:20:10. Electrochemical studies were performed in 1 M NaClO 4 in the mixture of ethylene carbonate and dimethyl carbonate electrolyte, with sodium metal reference electrode and platinum counter electrode.…”

Section: Resultsmentioning

confidence: 99%

“…Since it is supposed to compare the obtained galvanostatic curves with the experimental ones; accordingly, the particle sizes in the calculation were also taken the same as in our experiment −300 nm. 14 The particle shape is adopted as cubic.…”

Section: Resultsmentioning

confidence: 99%

“…The completeness of the electrochemical reaction, which determines the electrode capacity, is affected not only by the ratio of the conductive additive to the active material, but also by the size and shape of its particles. An important part is played by the density and thickness of the conductive coating on the particles surface of the material 6,13 and the conditions of a slurry preparation; in particular, the homogeneity of the active material with a conductive additive, as shown in 14 on the dependence of the specific capacity of the material on the mixture homogenization time.…”

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confidence: 99%

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Simulation of Intercalation Processes in Poorly Conductive Materials

Zhigalenok

Kokhmetova²,

Malchik³

et al. 2022

ECS J. Solid State Sci. Technol.

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To determine the impact of the electrode composite parameters of metal-ion intercalation into host materials with poor conductivity, the processes were simulated with varying possible values of parameters. A physical model is proposed for the intercalation into an active material particle that has point contacts with an electronic conductor, considering the change in phase conductivity during intercalation. The basis of the model is the processes of electron migration through the phase of the poorly conductive material to its interface with the electrolyte, intercalation of cations from the electrolyte into the cathode material, formation of intercalated phase, and its subsequent diffusive propagation into the material bulk. The finite element method implemented in COMSOL Multiphysics software was used for numerical simulation. The effect of electrical conductivity, kinetic parameters at the interfaces, mass transfer of intercalated atoms in the host material, and the number of electronic contacts with cathode particle were simulated. The strong dependence of the kinetics of the de/intercalation process on the number of electronic contacts on the particle is discovered. It is shown that starting from certain values of the conductivity of the intercalation material, the reaction can be described by the equipotential surface approximation.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Simulation of Intercalation Processes in Poorly Conductive Materials

Zhigalenok

Kokhmetova²,

Malchik³

et al. 2022

ECS J. Solid State Sci. Technol.

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“…However, the complicated preparation conditions and the instability of the material itself lead to limitations in its application in mercury removal. In addition, the materials available for MoS 2 doping are relatively scarce, and complex methods are required for doping except for Li. , Two-dimensional transition metal carbide/nitride (MXene) is a new series of the two-dimensional layered material, its molecular structure is composed of transition metals (such as Ti, V, Nb, etc.) and carbon/nitrogen .…”

Section: Introductionmentioning

confidence: 99%

CuS-Doped Ti₃C₂ MXene Nanosheets for Highly Efficient Adsorption of Elemental Mercury in Flue Gas

Wei

et al. 2022

Energy Fuels

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Mercury pollution in flue gas from coal-fired power plants will seriously harm the ecological environment and biological safety. The flue gas is often accompanied by acid gases (SO 2 , NO), which will seriously affect the efficiency of the mercury adsorbent. In this work, a new type of metal sulfide CuS-modified Ti 3 C 2 adsorbent has been prepared, which has a strong resistance to acid gases. Moreover, when the weight percentage of CuS is 10 wt %, the synthesized composite material (TC-10) has a very excellent efficiency of mercury removal, and the adsorption capacity is as high as 20.478 mg•g −1 . X-ray photoelectron spectroscopy results show that disulfide ions (S 2 2−) and adsorbed oxygen are the main active substances. 3DFT calculation was used to further analyze the interaction between Hg 0 and the pristine Ti 3 C 2 adsorbent and the modified CuS/Ti 3 C 2 . Results show that CuS doping increases the activity of the pristine Ti 3 C 2 surface. Therefore, this study proves that CuS/Ti 3 C 2 is a promising material for removing mercury from coal-fired power plants and expands the application range of MXene.

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Iron‐Based Sulfate for Sodium‐Ion Batteries: Past, Present, and Future

Liu,

Wang,

Wang

et al. 2024

Energy Tech

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Sodium‐ion batteries (SIBs) are crucial energy equipment that sustain low cost and better environmental benefit. Nevertheless, the practical energy density of SIBs is limited by cathode material. Over last decades, the iron‐based sulfate (IBS) has been extensively studied owing to its numerous advantages, including a large theoretical specific energy (over 100 Wh kg−1), high working potential (above 3.4 V), low cost, good structural stability, and environmental friendliness. Nevertheless, the application of IBS in SIBs is limited by its unsuitable electrolyte and low electronic/ionic conductivity. This review summarizes recently developed results on IBS materials for SIBs, ranging from the phase diagram–composition structure–electrochemical performance to modification research. A generalized summary of the future prospects of IBS‐based materials is also provided, with the hope of inspiring further advances in their application in SIBs.

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Effect of the MoS2 surface layer on the kinetics of intercalation processes in the NaFe(SO4)2/C composite

Cited by 4 publications

References 35 publications

Simulation of Intercalation Processes in Poorly Conductive Materials

Simulation of Intercalation Processes in Poorly Conductive Materials

CuS-Doped Ti₃C₂ MXene Nanosheets for Highly Efficient Adsorption of Elemental Mercury in Flue Gas

Iron‐Based Sulfate for Sodium‐Ion Batteries: Past, Present, and Future

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Effect of the MoS2 surface layer on the kinetics of intercalation processes in the NaFe(SO4)2/C composite

Cited by 4 publications

References 35 publications

Simulation of Intercalation Processes in Poorly Conductive Materials

Simulation of Intercalation Processes in Poorly Conductive Materials

CuS-Doped Ti3C2 MXene Nanosheets for Highly Efficient Adsorption of Elemental Mercury in Flue Gas

Iron‐Based Sulfate for Sodium‐Ion Batteries: Past, Present, and Future

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Product

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About

CuS-Doped Ti₃C₂ MXene Nanosheets for Highly Efficient Adsorption of Elemental Mercury in Flue Gas