NOVELTY - A gel electrolyte comprises greater than or equal to 1 layer (a) of polymer having polymerized units of monomer (a1) containing ethylenically unsaturated unit and amido group, where carbon atom of amido group is linked via chemical bond to one of carbon atoms of ethylenically unsaturated unit, and crosslinker (a2) containing greater than or equal to 2 ethylenically unsaturated units and spacer with greater than or equal to 2 carbon atoms, where 2 of ethylenically unsaturated units are linked together via the spacer, conducting salt (b), and solvent (c).    USE - A gel electrolyte for electrochemical cell (claimed).    ADVANTAGE - The polymers used are stable against nucleophilic attack, preferably by soluble lithium polysulfide in an electrochemical cell, and provided an improved stability versus polymers based on acrylates due to higher stability of amide bond of the polymers during a nucleophilic attack. The monomers used can be rapidly polymerized even on the surface of an electrode, particularly on surface of lithium anode, allowing for higher scale production. The amido-containing polymers show good adhesion on the surface of an electrode and have good swelling behavior, particularly within gel electrolytes. The gel electrolytes are safe because the liquid components of the electrolyte are withheld by the polymer in case of the gel electrolyte being used in an electrochemical cell which is damaged or becomes damaged during operation. No leaking or at least reduced leaking of liquid components in electrochemical cell is observed. Ionic conductivity of gel electrolyte is similar to conventional pure liquid electrolyte, resulting in high stability and high conductivity of the gel electrolyte.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) electrochemical cell comprising gel electrolyte;    (2) battery comprising gel electrolyte in which battery is preferably a lithium/sulfur (Li/S) battery;    (3) preparation of gel electrolyte which involves obtaining polymer layer by radical polymerization;    (4) electrode comprising component (a), electroactive layer (d), and ceramic layer (e) in which component (a) is completely covered by component (e) or both components (d) and (e);    (5) preparation of electrode which involves obtaining polymer layer by radical polymerization, preferably carried out on surface of electroactive layer of Li-anode;    (6) preparation of electrochemical cell which involves obtaining polymer layer by radical polymerization; and    (7) use of polymer comprising polymerized units of (a1) and (a2) as polymer layer in electrode, in electrolyte, separator, battery, article of use in electrochemical cell, or electrochemical cell.