▎ 摘　　要

NOVELTY - Electrolyte comprises a molecular crowding agent, a salt and a water, where molecular crowding agent is a water-miscible or water-soluble polymer selected from the group consisting of poly(ethylene glycol), polypropylene glycol), polyethylenimine, poly(acrylic acid), polyvinylpyrrolidone, polyvinyl alcohol), polyacrylamides, polyphosphates, polyphosphazenes, polyoxazoline, sodium carboxymethyl cellulose, hyaluronic acid, hydroxypropyl cellulose, divinyl ether-maleic anhydride, N-(2-hydroxypropyl) methacrylamide copolymer, and a derivative. USE - Electrolyte used in battery (claimed). ADVANTAGE - The electrolyte is used as molecular crowding type electrolyte in electrochemical system such as battery, and also avoid high rigidity and electrode-electrolyte contact issues, the water stability window is narrow in these non-fluorinated electrolytes, leading to lower energy density and shorter cycle life compared with fluorinated salt. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for following: a battery, which comprises an anode, a cathode and an electrolyte, where electrolyte comprises a molecular crowding agent, a salt and a water, and wherein the molecular crowding agent is a water-miscible or water-soluble polymer selected from the group consisting of poly(ethylene glycol), poly(propylene glycol), polyethylenimine, poly(acrylic acid), polyvinylpyrrolidone, poly(vinylalcohol), polyacrylamides, polyphosphates, polyphosphazenes, polvoxazoline, sodium carboxymethyl cellulose, hyaluronic acid, hydroxypropyl cellulose, divinyl ether-maleic anhydride, N-(2-hydroxypropyl) methacrylatnide copolymer, and a derivative; and a method for manufacturing a battery, which involves providing an anode and a cathode, preparing an electrolyte from a salt, a water and a molecular crowding agent, where molecular crowding agent is a water-miscible or water-soluble polymer selected from the group consisting of poly(ethylene glycol), poly(propylene glycol), polyethylenimine, poly(acrylic acid), polyvinylpyrrolidone, polyvinyl alcohol), polyacrylamides, polyphosphates, polyphospbazenes, polyoxazoline, sodium carboxymethyl cellulose, hyaluronic acid, hydroxypropyl cellulose, divinyl ether-maleic anhydride, N-(2-hydroxypropyl) methacrylamide copolymer, and a derivative, and assembling the anode and the cathode with the electrolyte to obtain battery.