Gelatine based gel polymer electrolyte towards more sustainable Lithium-Oxygen batteries

•Single step methacrylation of gelatine from the fishing industry waste•One pot photoreticulation of methacrylated gelatine with liquid electrolyte•High ionic conductivity of 2.51 mS cm−1 and lithium transference number of 0.54•More than 100 cycles at 0.1 mA cm−2, under constant O2 flow, at room temperature•Reduced solvent degradation thanks to the bio-renewable polymer