▎ 摘　　要

NOVELTY - Applying a functional compound on sulfur particles (1) involves supplying (31) a feed comprising sulfur particles and/or a coating composition (2) to an atmospheric pressure plasma discharge comprising a gas and/or an activated gas flow resulting from the plasma discharge, and contacting (32) the sulfur particles and the coating composition. The coating composition is converted into the functional compound and applied to the sulfur particles. The coating composition comprises inorganic electroconductive compound(s), electroconductive carbon compound(s), organic precursor compound(s) of a conjugated polymer, and/or precursor(s) of a hybrid organic-inorganic compound. The functional compound provides the sulfur particles with an electroconductive surface. USE - Applying functional compound on sulfur particles for forming treated sulfur particles used in cathode for lithium-sulfur battery cell (all claimed) for electrical and portable devices, and electric vehicles. ADVANTAGE - The method provides battery cell having a real energy density closer to the theoretical energy density, reduced charging time due to increased conductivity of the sulfur particles, extended lifetime due to excellent control of volume change of sulfur upon charging and discharging due to elasticity provided by the functional compound, reduced precipitation of lithium sulfide, reduced growth of lithium dendrite, and reduced irreversible loss of sulfur and shuttling of sulfur due to the solubility of polysulfides. The coating composition enhances barrier effect and electrical conductivity of the sulfur particles. The presence of functional compound on the sulfur particles reduces the amount of conductive material or electrolyte solid interphase compared to uncoated sulfur particles, reduces mobility of the sulfur particles, suppresses formation of polysulfides, reduces formation of lithium polysulfides, and reduces mechanical stress on the cathode of the battery cell. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) treated sulfur particles (3), which comprise a sulfur core and the functional compound arranged in a layer around the sulfur core; and (2) cathode, which comprises a cathode coating conductive to lithium ion (Li+) ions and insulating to electrons. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the method. Sulfur particles (1) Coating composition (2) Treated sulfur particles (3) Supplying process (31) Contacting process (32) Doping process (33)