The structure of ionically conductive chalcogenide glasses: a combined NMR, XPS and ab initio calculation study

Foix, Dominique; Gonbeau, Danielle; Taillades, Gilles; Pradel, Annie; Ribes, M.

doi:10.1016/s1293-2558(00)01134-1

Cited by 28 publications

(34 citation statements)

References 12 publications

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“…S8c ), exhibited two peaks couples with the S 2p 3/2 peaks at binding energies of 160.7 ± 0.2 eV and 167.4 eV, corresponding to the sulphide (S 2− ) and oxy-sulphur (S-O) contamination, respectively. The S 2p core level peaks of Li 2 S are in agreement with the literature data 58 .…”

supporting

confidence: 91%

Single step transformation of sulphur to Li2S2/Li2S in Li-S batteries

Helen

Reddy

Diemant

et al. 2015

Sci Rep

160

148

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Lithium-sulphur batteries have generated tremendous research interest due to their high theoretical energy density and potential cost-effectiveness. The commercial realization of Li-S batteries is still hampered by reduced cycle life associated with the formation of electrolyte soluble higher-order polysulphide (Li2Sx, x = 4–8) intermediates, leading to capacity fading, self-discharge, and a multistep voltage profile. Herein, we have realized a practical approach towards a direct transformation of sulphur to Li2S2/Li2S in lithium-sulphur batteries by alteration of the reaction pathway. A coconut shell derived ultramicroporous carbon-sulphur composite cathode has been used as reaction directing template for the sulphur. The lithiation/delithiation and capacity fading mechanism of microporous carbon confined sulphur composite was revealed by analyzing the subsurface using X-ray photoelectron spectroscopy. No higher-order polysulphides were detected in the electrolyte, on the surface, and in the subsurface of the cathode composite. The altered reaction pathway is reflected by a single-step profile in the discharge/charge of a lithium-sulphur cell.

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supporting

confidence: 91%

Single step transformation of sulphur to Li2S2/Li2S in Li-S batteries

Helen

Reddy

Diemant

et al. 2015

Sci Rep

160

148

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“…This doublet arises from the Li 2 S bonding and means that only the Li 2 S bonding exists. This result agrees well with the literature data (Foix et al, 2001). …”

Section: Analysis Of the LI 2 S And Ges 2 Starting Materialssupporting

confidence: 94%

“…For this reason, it is believed that a better representation of the bonding chemistries, the chemical speciation, of these thin-films are therefore found in the as-prepared surfaces of the thin-films. For example, Foix et al reported the fractions of NBS and BS in lithium thio-germanate and thio-arsenate bulk glasses and to do so they broke the glasses in the glove box and they characterized the newly exposed broken surface of the glasses without Ar etching (Foix et al, 2001;Volynsky et al, 2001). …”

Section: Lithium Thio-germanate Thin-film Analysismentioning

confidence: 99%

New Developments in Solid Electrolytes for Thin-Film Lithium Batteries

Seo¹,

Martin²

2012

Lithium Ion Batteries - New Developments

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“…Before a detailed description of our results, it is of interest to remind the main features that were obtained on the thiogermanate and thiosilicate glasses on the basis of core peak analysis [26][27][28].…”

Section: Resultsmentioning

confidence: 99%

“…In previous papers [25][26][27][28], XPS core peak analysis has been successfully used to study different families of chalcogenide glasses (thioborate, thiosilicate, thiogermanate and thioarseniate glasses). However, XPS valence band spectra, which correspond to the visualization of the occupied density of states, are rarely used.…”

Section: Introductionmentioning

confidence: 99%