Synthesis and study of the electronic structure of molybdenum tetrasulfide and its lithium intercalates

Khudorozhko, G. F.; Bulusheva, L. G.; Mazalov, L. N.; Федоров, В. Е.; Morales, J.; Кравцова, Е. А.; Asanov, I. P.; Parygina, G. K.; Mironov, Yu. V.

doi:10.1016/s0022-3697(97)00127-3

Cited by 12 publications

(11 citation statements)

References 15 publications

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“…2À have also been disclosed in the same work by Khudorozhko [26] reporting on rich lithiated phases of Li 7 MoS 4 in composition, prepared however, by chemical lithiation.…”

Section: Introductionmentioning

confidence: 61%

“…Ahighly oxidized phase of the MoS 4 2À ,presented as MoS 4 , was reported by Khudorozhko et al [26] This was obtained by thermal dissociation of (NH 4 ) 2 Mo 2 S 12 •2 H 2 O. Te ny ears earlier, Abraham studied as imilar composition based on as elenium-doped MoSe 3 Sp hase. [27,28] Ther espective studies focused on Li + intercalation and electronic structure investigations,s tarting with the parent MoS 4 phases.C onsidering these,i tc ould be presumed that MoS 4…”

Section: Introductionmentioning

confidence: 87%

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Mixed Anionic and Cationic Redox Chemistry in a Tetrathiomolybdate Amorphous Coordination Framework

et al. 2020

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We report the electrochemistry of a hitherto unexplored Na2MoS4 phase as a conversion electrode material for Na‐ and Li‐ion batteries. The material adopts an amorphous coordination polymer structure with mixed Mo and S valences. XPS and XRD analysis reveal a complex interplay between Mo and S redox chemistry, while excluding the formation of free sulfur, lithium sulfide, or other crystalline phases. Na2MoS4 behaves as a mixed ionic–electronic conductor, with electronic conductivity of 6.1×10−4 S cm−1, that permits carbon‐free application in an electrochemical cell. A reversible capacity of up to 500 mAh g−1 was attained, corresponding to a five‐electron redox exchange, with species ranging from (highest oxidized state) to 5MoS4> (lowest oxidized state). This study emphasizes the excellent charge‐storage performances of Na2MoS4 for Li‐ or Na‐ion batteries, and enriches the emerging library and knowledge of sulfide phases with mixed anionic and cationic redox properties.

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“…2À have also been disclosed in the same work by Khudorozhko [26] reporting on rich lithiated phases of Li 7 MoS 4 in composition, prepared however, by chemical lithiation.…”

Section: Introductionmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 87%

Mixed Anionic and Cationic Redox Chemistry in a Tetrathiomolybdate Amorphous Coordination Framework

et al. 2020

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“…Since no crystalline sulfides with S/Mo ratio greater than 2 exist on the phase diagram MoeS, their preparations are all soft chemistry ones and often carried out using sulfur-rich thiomolybdates. Rice temperatures [35]. An X-ray amorphous phase with the analytical formula MoS 4 was synthesized.…”

Section: Mos 4 Mos 5 Mosmentioning

confidence: 99%

“…[72]. Sulfidation of nickel-and cobalt-promoted molybdenumealumina catalysts using a radioisotope 35 S-labeled H 2 S pulse tracer method was studied in Ref. [73].…”

Section: Sulfidation Of the Oxidesmentioning

confidence: 99%

Synthetic approaches to the molybdenum sulfide materials

Afanasiev

2007

Comptes Rendus. Chimie

107

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“…Among the amorphous transition metal polysulfides, MoS 3 is probably the most studied material. As other amorphous solids, it may be synthesized by soft chemical methods, in particular, by hydrolysis or thermolysis of thiomolybdate (NH 4 ) 2 MoS 4 , while by varying the precursor (taking (NH 4 ) 2 Mo 2 S 12 instead) and reaction conditions, other molybdenum polysulfides may be produced (MoS 4 , MoS 5.6 , MoS 6 ). An alternative synthetic approach to chalcogen‐rich MoS x , i. e. the reaction of metal carbonyls and sulfur/selenium in boiling benzene was studied in the early works of our group, and later developed by Hibble and co‐authors, using 1,2‐dichlorobenzene .…”

Section: Introductionmentioning

confidence: 99%

Revealing the Flexible 1D Primary and Globular Secondary Structures of Sulfur‐Rich Amorphous Transition Metal Polysulfides

et al. 2019

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Sulfur‐rich transition metal polysulfides MS5 (M=Mo, W) are synthesized by a low‐temperature solution method from corresponding carbonyls M(CO)6 and elemental sulfur. Extensive characterization reveals that all sulfur atoms are assembled into disulfide ligands (S−S) within the structure of the amorphous spherical particles. Their thermodynamic stabilities are estimated for the first time using density functional theory (DFT) calculations, indicating two stable chain models composed either of binuclear [M2S8] or trinuclear [M3S12] fragments linked through S−S units. Molecular dynamics (MD) DFTB simulation proves that the S−S bridges predetermine the supreme flexibility of the polysulfide chains as primary structures of MS5 and their globular secondary arrangements. Interestingly, this type of structural organization is reminiscent of that for classical polymers. Thus, the reasons for MS5 forming exclusively as amorphous phases are uncovered, which may be extended to many other sulfur‐rich polysulfides. The potential of these materials as increased capacity cathodes for lithium‐ion batteries is shown.

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Synthesis and study of the electronic structure of molybdenum tetrasulfide and its lithium intercalates

Cited by 12 publications

References 15 publications

Mixed Anionic and Cationic Redox Chemistry in a Tetrathiomolybdate Amorphous Coordination Framework

Mixed Anionic and Cationic Redox Chemistry in a Tetrathiomolybdate Amorphous Coordination Framework

Synthetic approaches to the molybdenum sulfide materials

Revealing the Flexible 1D Primary and Globular Secondary Structures of Sulfur‐Rich Amorphous Transition Metal Polysulfides

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