Mg-ion batteries are rechargeable aqueous metal-ion batteries (RAMBs) and eco-friendly energy storage devices. Herein, we have fabricated T-MgMn2O4, and T- MgNd0.02Co0.18Mn1.78O4 spinel cathode materials via modifying the sol-gel route. This eco-friendly modified method is low cost, high stability, and low toxicity which is carried out by gamma radiation in the Co60 gamma cell source with a dose r...