Carbyne polysulfide as a novel cathode material for lithium/sulfur batteries

Long-life, high-efficiency lithium/sulfur batteries from sulfurized carbon nanotube cathodes

“…[13][14][15] Commonly, SCs are synthesized at high temperatures (> 500 °C) by reacting carbon with sulfur. [16][17][18][19][20] Indeed, SCs have been shown to reduce the adverse effects of polysulfide dissolution, but at the same time, have caused several concerns including: (і) the low sulfur content (e.g. 14 Researchers have studied various carbon or polymer materials that containing surface functional groups such as -OH, >C=O, -C(=O)OH, and >C=C<, which have shown some progress in binding sulfur on the surfaces of carbon during heat treatments.…”

Inverse vulcanization of elemental sulfur with 1,4-diphenylbutadiyne for cathode materials in Li–S batteries

“…2 Thus, the challenge remains to develop electroactive components for battery electrodes which utilize sustainable, earth abundant materials that also possess improved electrochemical properties. [12][13][14][15][16] The analogous electrochemical reactivity of the high S-S bond content of these copolymers compared with elemental sulfur (S 8 ) enables their use as the active material in lithium-sulfur (Li-S) batteries. [3][4][5][6][7][8][9][10][11] High sulfur content copolymers have recently been of particular interest as a class electroactive polymeric cathode materials for secondary lithium batteries due to their high specic capacity and exceptional cycle life.…”

Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti2SC

“…The TGA curve in Ar shows three weight loss regions: i) 140-300 o C presumably corresponding to the evaporation of elemental S [3] , (ii) 300-480 o C corresponding to the decomposition of the C-Sx compounds [4] and, iii) >480 o C corresponding to the decomposition of O-containing functional groups [4] . Figure S7 EDS spectrum of the C/S nanolaminates after HF washing.…”

“…When the Raman spectrum of the sample etched at 0.3 V (second to bottom curve in Figure 1 c) is compared to that of Ti 2 SC (bottom curve in Figure 1 c), it is clear that peaks for the latter disappear completely. Instead, a single mode, around 1440 cm À1 , most probably corresponding to carbyne polysulfide, was observed, [13] indicating the selective extraction of Ti from the Ti 2 SC and the formation of SÀC bonds. Almost identical Raman spectra were observed for products etched at 0.6 and 1.0 V. At the highest etching potentials of 1.4 and 2.0 V, Raman peaks (top curve in Figure 1 c) coinciding with those of CDC, were observed.…”

“…[1f, 2] The direct reaction between different elements, or compounds, is also a general synthesis approach for the formation of 2D materials, such as the chemical vapor deposition of graphene from hydrocarbons [3] and the co-precipitation of metal hydroxides/oxides. [4] Recently, there has also been great interest in selective extraction processes to produce 2D materials due to its ability to achieve well-controlled morphologies and structures, and even generate new materials that cannot be produced by other methods. [1e, 5] One of the best known, and most studied selective extraction processes is the synthesis of carbide-derived carbons (CDCs) with high specific surface areas and tunable pore sizes, which involves the selective etching of metals from metal carbides.…”