Electrochemical reduction of sulphur in dimethylacetamide

Paris, Jacky; Plichon, V.

doi:10.1016/0013-4686(81)85170-5

Cited by 68 publications

(58 citation statements)

References 14 publications

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“…Before UV-VIS spectroscopy measurements, the discharged cathodes were immersed into a solvent identical to the one used in the cell, so as to obtain polysulfide solutions for taking measurements. When the cell is discharged to 2.35 V (the upper plateau region), the absorption peaks of the solution lie mainly in the wavelength range of 200-400 nm (see D235 in Figure 9), indicative of long chain polysulfides (Li 2 S x , 4 < x ≤ 8) [24,25]. The wavelengths of these absorption peaks are increased when discharging to 2.05 V and 1.5 V (the lower plateau region), revealing that some of the long chain polysulfides have transformed to short chain polysulfides (Li 2 S x , x ≤ 4) in the presence of discharge reactions.…”

Section: Resultsmentioning

confidence: 99%

Acetylene Black/Sulfur Composites Synthesized by a Solution Evaporation Concentration Crystallization Method and Their Electrochemical Properties for Li/S Batteries

Tan

Wang

et al. 2013

Energies

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Abstract:A novel technique to prepare carbon/sulfur composites as cathode materials for Li/S batteries is proposed, which we call the 'solution evaporation concentration crystallization' method. Three composites with different S loadings were prepared, subject to two different solvent evaporation rates from acetylene black (AB)/sulfur in carbon disulfide solutions. X-ray diffraction, environmental scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller measurements all show that the porous AB structure is well-filled with S. Composites prepared at a lower solvent evaporation rate with 50 wt % S content, had good electrochemical properties, with 1609.67 mAh g after 100 cycles. Composites with better dispersibility at a low solvent evaporation rate can effectively prevent polysulfide from dissolving in the electrolyte, and serve to stabilize the structure of the S cathode during the charge-discharge process.

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Section: Resultsmentioning

confidence: 99%

Acetylene Black/Sulfur Composites Synthesized by a Solution Evaporation Concentration Crystallization Method and Their Electrochemical Properties for Li/S Batteries

Tan

Wang

et al. 2013

Energies

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“…has been studied by several authors for the past 35 years [47][48][49][50][51][52][53][54][55][56][57][58][59][60]. has been studied by several authors for the past 35 years [47][48][49][50][51][52][53][54][55][56][57][58][59][60].…”

Section: ''Classical'' Nonaqueous Solventsmentioning

confidence: 99%

“…2). In 1974, Badoz-Lambling [50] assigned them to the reduction of S 6 2− and, in 1981, Paris [52] assigned them to the reduction of S 8 2− and S 6 2− . The prewave is clearly observed at low scan rates, at high temperatures, and under thin layer conditions.…”

Section: ''Classical'' Nonaqueous Solventsmentioning

confidence: 99%

Sulfur

Levillain¹,

Demortier²,

Lelieur³

2006

Encyclopedia of Electrochemistry

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The sections in this article are Introduction Sulfur and Polysulfide Ions in Solution Nonaqueous Solvents Aqueous Solutions Electroreduction of Sulfur and Redox Properties of Polysulfides “Classical” Nonaqueous Solvents Liquid Ammonia Aqueous Solutions Electrooxidation of Sulfur Applied Electrochemistry Electrosynthesis Batteries, Solar Cells, and Sulfurization Environmental Chemistry Conclusion

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“…The sulfur, however, does not work successfully as reversible positive electrode materials in a secondary lithium battery with electrolyte solutions. The capacity of the Li/S battery rapidly fades away on cycling, when the Li/S battery has discharged to a sulfur-utilization rate larger than 60% [1][2][3][4][5][6][7]. The capacity fading has been attributed to the fact that the lithium poly-sulfides Li 2 S x (xN4) are produced by the electrochemical reduction of sulfur and that the poly-sulfide ions dissolve in the electrolyte solutions of the batteries.…”

Section: Introductionmentioning

confidence: 99%

“…Elemental sulfur is very attractive as a positive electrode material for lithium batteries because of its high theoretical specific capacity of 1670 mAhg À1 , nontoxicity, and inexpensiveness [1][2][3][4][5][6][7]. The sulfur, however, does not work successfully as reversible positive electrode materials in a secondary lithium battery with electrolyte solutions.…”

Section: Introductionmentioning

confidence: 99%