Effect of cationic disorder on the energy generation and energy storage applications of NixCo3−xS4 thiospinel

Gervas, Charles; Khan, Malik Dilshad; Zhang, Chunyang; Zhao, Chen; Gupta, Ram K.; Carleschi, Emanuela; Doyle, Bryan P.; Revaprasadu, Neerish

doi:10.1039/c8ra03522a

Cited by 32 publications

(10 citation statements)

References 58 publications

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“…The spinel structure is known to be flexible and allows an accommodation of 1) a variety of metallic elements with different atomic size and mass, 2) ordered or disordered arrangement of cations (so‐called normal, inverse, or intermediate structures), and 3) partially occupied crystallographic positions. All these result in a diversity of magnetic, optical, catalytic, electrical, as well as thermoelectric (TE) properties . Many spinels consisting of well‐abundant and environmental‐friendly elements (which is crucial for a possible thermoelectric application) became the object of numerous studies.…”

Section: Introductionmentioning

confidence: 99%

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Wyżga

Veremchuk²,

Bobnar³

et al. 2020

Chemistry A European J

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The homogeneity range of ternary iron indium thiospinela t8 73 Kw as investigated. Ad etailed study was focused on two distinct series (y = z): 1) ap reviously reported charge-balanced (In 0.67 + 0.33y & 0.33À0.33y ) tetr [In 2Àz Fe z ] oct S 4 (A1series; & stands for vacancy;t he abbreviations "tetr" and "oct" indicate atoms occupying tetrahedral 8a and octahedral 16d sites, respectively)a nd 2) an ew charge-unbalanced (In 0.67 + y & 0.33Ày ) tetr [In 2Àz Fe z ] oct S 4 (A2-series). Fe atoms were confirmed to exclusively occupy an octahedral positioni nb oth series. An unusualr eduction of the unit cell parameter with increasing Fe contenti se xplained by differences in the ionic radii between Fe and In, as well as by an additional electrostatic attraction originating from charge imbalance( latter only in A2-series). The studiedc ompound is an n-type semiconductor,a nd its charge carrier concentration increases or decreases for larger Fe content withint he A1-and A2-series, respectively.T he thermal conductivity k tot is significantly reducedu pon increasing vacancy concentration, whereas the changeo fp ower factor is insufficientt od rastically improve the thermoelectric figure of merit.

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Section: Introductionmentioning

confidence: 99%

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Wyżga

Veremchuk²,

Bobnar³

et al. 2020

Chemistry A European J

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“…[16] Similarly, Ni-rich or Co-rich Ni x Co 3À x S 4 showed significantly different electrochemical performance. [17] Herein, we have synthesized [tris(morpholinodithio-carbamato)Co(III)] complex and carried out the structure elucidation by single crystal X-ray diffraction. The complex was used to prepare cobalt sulfide nanoplates by the hot injection method at two different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Off‐Stoichiometric CoS Nanoplates from a Molecular Precursor for Efficient H₂/O₂ Evolution and Supercapacitance

et al. 2019

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The development of cost-effective and easily accessible bifunctional materials, which can be effectively used for energy storage and energy generation, is highly desirable. Herein, a new molecular precursor [tris(morpholinodithiocarbamato)Co (III)] has been synthesized and the X-ray crystal structure of the complex determined. The precursor was used to prepare oleylamine (OLA)-capped cobalt sulfide nanoplatelets, using a facile hot injection method at two different temperatures (200°C and 260°C). The characterization of the samples shows that CoS synthesized at 200°C is slightly sulfur rich, whereas CoS synthesized at 260°C is slightly cobalt rich. The effect of off-stoichiometry of CoS nanoplatelets on the energy gener-ation and storage applications was studied. The oxygen evolution reaction catalytic performance of both samples indicate overpotentials of 307 and 276 mV as well as Tafel slopes of 96 and 82 mV/dec, respectively. Similarly, overpotentials of 132 and 153 mV were observed for the hydrogen evolution reaction, with Tafel slopes of 159 and 154 mV/dec, respectively. The capacitive behavior of the samples was also examined, and specific capacitance values of 298 and 440 F/g were obtained with cycling stabilities of 73 and 97 %, after 5000 cycles, respectively. The results indicate that sulfur-deficient CoS can show superior performance for efficient energy generation and storage devices.[a] C.

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“…From the XRD analysis, the thiospinel structure (AB 2 S 4 , where A and B are the M 2+ and M 3+ oxidation states, respectively) of NiCo 2 S 4 was confirmed. In this thiospinel structure, Ni 2+ occupied the tetrahedral site and Co 3+ occupied the octahedral site with a built-in, tightly packed with the array of S −2 ions [44].…”

Section: Structural and Morphological Analysis Of Nico 2 Smentioning

confidence: 99%

In Situ Binder-Free and Hydrothermal Growth of Nanostructured NiCo2S4/Ni Electrodes for Solid-State Hybrid Supercapacitors

et al. 2021

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Herein, we report a comparison of the electrochemical performance of two kinds of NiCo2S4-based electrodes for solid-state hybrid supercapacitors (HSCs). For the binder-free electrode, NiCo2S4 was grown on Ni foam by the chemical bath deposition (CBD) method. For the binder-using electrode, NiCo2S4 powder was synthesized by the hydrothermal method. FESEM images depicted the hierarchical nanostructure of NiCo2S4 synthesized by the hydrothermal method and uniform distribution of nanostructured NiCo2S4 grown on Ni foam by the CBD method. Half-cell studies of both NiCo2S4 electrodes showed them exhibiting battery-type charge storage behavior. To assemble HSCs, NiCo2S4 and activated carbon were used as a positive and negative electrode, respectively. Electrochemical studies of the HSCs showed that the accessible potential window was wide, up to 2.6 V, through cyclic voltammetry (CV) analysis. Chronopotentiometry (CP) studies revealed that the energy and power densities of binder-using HSC were 51.24 Wh/kg and 13 kW/kg at 1 Ag−1, respectively, which were relatively higher than those of the binder-free HSC. The binder-free HSC showed 52% cyclic stability, relatively higher than that of the binder-using HSC. Both HSCs, with unique benefits and burdens on energy storage performance, are discussed in this work.

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Effect of cationic disorder on the energy generation and energy storage applications of Ni_xCo_3−xS₄ thiospinel

Abstract: Thiospinels show interesting catalytic and energy storage applications, however, the cationic disorder can have major influence on the energy generation and/or energy storage applications.

Cited by 32 publications

References 58 publications

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Synthesis of Off‐Stoichiometric CoS Nanoplates from a Molecular Precursor for Efficient H₂/O₂ Evolution and Supercapacitance

In Situ Binder-Free and Hydrothermal Growth of Nanostructured NiCo2S4/Ni Electrodes for Solid-State Hybrid Supercapacitors

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Effect of cationic disorder on the energy generation and energy storage applications of NixCo3−xS4 thiospinel

Abstract: Thiospinels show interesting catalytic and energy storage applications, however, the cationic disorder can have major influence on the energy generation and/or energy storage applications.

Cited by 32 publications

References 58 publications

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Synthesis of Off‐Stoichiometric CoS Nanoplates from a Molecular Precursor for Efficient H2/O2 Evolution and Supercapacitance

In Situ Binder-Free and Hydrothermal Growth of Nanostructured NiCo2S4/Ni Electrodes for Solid-State Hybrid Supercapacitors

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Effect of cationic disorder on the energy generation and energy storage applications of Ni_xCo_3−xS₄ thiospinel

Synthesis of Off‐Stoichiometric CoS Nanoplates from a Molecular Precursor for Efficient H₂/O₂ Evolution and Supercapacitance