HIGH-ELASTICITY POLYMER FOR LITHIUM METAL PROTECTION, LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD

A lithium secondary battery comprising a cathode, an anode, and an elastic polymer protective layer disposed between the cathode and the anode, and a working electrolyte, wherein the elastic polymer protective layer comprises a high-elasticity polymer having a thickness from 50 nm to 100 μm, a lithium ion conductivity from 10S/cm to 5×10S/cm at room temperature, and a fully recoverable tensile elastic strain from 2% to 1,000% when measured without any additive or filler dispersed therein and wherein the high-elasticity polymer comprises a crosslinked polymer network of chains derived from at least one multi-functional monomer or oligomer selected from an acrylate, polyether, polyurethane acrylate, tetraethylene glycol diacrylate, triethylene glycol dimethacrylate, or di(trimethylolpropane) tetraacrylate, wherein a multi-functional monomer or oligomer comprises at least three reactive functional groups.