Structural studies of glassy and crystalline selenium-sulphur compounds

Kotkata, M. F.; Nouh, S. A.; Farkas, László; Radwan, Mostafa A.

doi:10.1007/bf01107205

Cited by 22 publications

(18 citation statements)

References 7 publications

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“…In general, Se x S y represents a class of eight‐membered ring‐like molecules with diverse quantitative ratios of Se to S atoms. [ 161–167 ] Initially, SeS 2 was evaluated as cathode by Amine's group. [ 22 ] Their work demonstrated the high electroactivity of SeS 2 in Li and Na batteries, far exceeding bare Se.…”

Section: Cathodesmentioning

confidence: 99%

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Sun

Liu

et al. 2021

Advanced Materials

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Li‐chalcogen batteries, especially the Li–S batteries (LSBs), have received paramount interests as next generation energy storage techniques because of their high theoretical energy densities. However, the associated challenges need to be overcome prior to their commercialization. Elemental selenium, another chalcogen member, would be an attractive alternative to sulfur owing to its higher electronic conductivity, comparable capacity density, and moreover, excellent compatibility with carbonate electrolytes. Unlike LSBs, the research and development of Li–Se batteries (LSeBs) have garnered burgeoning attention but are still in their infant stage, where a comprehensive yet in‐depth overview is highly imperative to guide future research. Herein, a critical review of LSeBs, in terms of the underlying mechanisms, cathode design, blocking layer engineering, and emerging solid‐state electrolytes is provided. First, the electrolyte‐dependent electrochemistry of LSeBs is discussed. Second, the advances in Se‐based cathodes are comprehensively summarized, especially highlighting the state‐of‐the‐art SexSy cathodes, and mainly focusing on their structures, compositions, and synthetic strategies. Third, the versatile separators/interlayers optimization and interface regulation are outlined, with a particular focus on the emerging solid‐state electrolytes for advanced LSeBs. Last, the remaining challenges and research orientations in this booming field are proposed, which are expected to motivate more insightful works.

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Section: Cathodesmentioning

confidence: 99%

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Sun

Liu

et al. 2021

Advanced Materials

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“…They suggested that mixed Se-S configurations occur in the films. Kotkata et al [8,9], produced several amorphous and crystalline Se x S 1 − x alloys and obtained some general results from XRD measurements indicating that amorphous alloys can be prepared in a relatively wide compositional range, from x=0.5 to x=1, the density of the alloys decreases as the S content is increased and the average total coordination number for Se atoms (〈N Se 〉=〈N Se − Se 〉+ 〈N Se − S 〉) is 2. Heiba et al [10] also used the XRD technique to study the crystallization of Se x S alloys, x=20,30,40, and crystallite sizes were determined from a refinement using the program FULLPROOF.…”

Section: Introductionmentioning

confidence: 95%

Reverse Monte Carlo simulations of an amorphous Se0.90S0.10 alloy produced by mechanical alloying combining XRD and EXAFS data

Machado

Sánchez

Brunatto

2010

Journal of Non-Crystalline Solids

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The local atomic order of an amorphous Se 0.90 S 0.10 alloy produced by Mechanical Alloying was studied by reverse Monte Carlo simulations combining X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) data obtained on Se K edge. From the simulations structural properties such as average interatomic distances and average coordination numbers were determined and compared with the values extracted using only XRD data in the simulations. In addition, the bond-angle distribution functions Θ ijℓ (cos θ) were obtained, and they indicate the existence of Se n clusters in the alloy and also the substitution of Se atoms by S atoms in some of these clusters.

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“…Debye-Waller factors obtained from the fitting process for a-Se 0.90 S 0.10 at the three temperatures studied and their simulations considering the correlated Einstein model given by(6). Third cumulants C 3 obtained from the fitting process for a-Se 0.90 S 0.10 at the three temperatures studied and their simulations considering the correlated Einstein model given by(7).…”

mentioning

confidence: 99%

“…is due to the structural part, the thermal contribution being small (see(7)). On the other hand, for Se-Se pairs, the opposite happens, the structural contribution C 3,st is null (or very small, considering the error bars), and C Se-Se 3…”

mentioning

confidence: 99%

Vibrational, optical and structural studies of an amorphous Se_0.90S_0.10alloy produced by mechanical alloying

Machado

Sánchez

Maciel

et al. 2009

J. Phys.: Condens. Matter

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The local atomic order of an amorphous Se(0.90)S(0.10) alloy produced by mechanical alloying was studied by x-ray diffraction and extended x-ray absorption fine structure (EXAFS) data obtained at three temperatures, T = 300, 200 and 30 K. From the cumulant analysis of the EXAFS data, structural properties such as average interatomic distances, average coordination numbers, Debye-Waller factors and anharmonicity, given by the third cumulant, were obtained. The results found indicate that there is alloying at an atomic level, and Se-S pairs are more disordered and distorted than Se-Se ones due to the milling process.

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Structural studies of glassy and crystalline selenium-sulphur compounds

Cited by 22 publications

References 7 publications

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Reverse Monte Carlo simulations of an amorphous Se0.90S0.10 alloy produced by mechanical alloying combining XRD and EXAFS data

Vibrational, optical and structural studies of an amorphous Se_0.90S_0.10alloy produced by mechanical alloying

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Structural studies of glassy and crystalline selenium-sulphur compounds

Cited by 22 publications

References 7 publications

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Reverse Monte Carlo simulations of an amorphous Se0.90S0.10 alloy produced by mechanical alloying combining XRD and EXAFS data

Vibrational, optical and structural studies of an amorphous Se0.90S0.10alloy produced by mechanical alloying

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Vibrational, optical and structural studies of an amorphous Se_0.90S_0.10alloy produced by mechanical alloying