NOVELTY - The cell (100) comprises a positive electrode (102) comprising a sulfur compound, a negative electrode (101), a circuit coupling the positive electrode with the negative electrode, an electrolyte medium, an interior wall of the cell, and an article comprising a hydrocarbon ionomer. The article is: a porous separator (105); a coating applied on a surface of the porous separator, the negative electrode, the circuit and the interior wall of the cell; and a film and/or a membrane. The hydrocarbon ionomer is incorporated as a surface coating on a surface of the article.    USE - The cell is useful in a portable battery and a power source for an electrified vehicle, an ignition system of a vehicle and a mobile device (claimed), where the cell is lithium sulfur cell.    ADVANTAGE - The cell has high energy density, high coulombic efficiency, and high maximum discharge capacity or high ratios of discharge to charge capacity.    DETAILED DESCRIPTION - The cell (100) comprises a positive electrode (102) comprising a sulfur compound, a negative electrode (101), a circuit coupling the positive electrode with the negative electrode, an electrolyte medium, an interior wall of the cell, and an article comprising a hydrocarbon ionomer. The article is: a porous separator (105); a coating applied on a surface of the porous separator, the negative electrode, the circuit and the interior wall of the cell; and a film and/or a membrane. The hydrocarbon ionomer is incorporated as a surface coating on a surface of the article in an amount of 0.0001-100 mg/cm2. The article is situated in the electrolyte medium. The hydrocarbon ionomer is located in a pore wall of a pore in the porous separator and exposed to electrolyte medium in a pore volume in the pore. The electrolyte medium is a lithium-containing cell solution comprising solvent and electrolyte. The hydrocarbon ionomer has a neutralization ratio of greater than 10%. INDEPENDENT CLAIMS are included for:    (1) a method for making a cell; and    (2) a method for operating a cell.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a lithium-sulfur cell incorporating hydrocarbon monomer articles.    Cell (100)    Negative electrode (101)    Positive electrode (102)    Porous separator (105)    Cell container wall. (107)