Carbon and germanium nanocages as anode electrodes in sodium-ion and potassium-ion batteries.

Here, the potential of C, C, and Ge nanocages as anodes of Na-ion battery (IB) and K-IB are investigated by DFT/M06-2X and DFT/B3LYP in gas and solvent. The E and E of C, C, and Ge nanocages are investigated by theoretical methods. The vertical and adiabatic EA and IP of C, C, and Ge nanocages are examined in gas and solvent. The E of Na and K on inner and outer positions of C, C, and Ge nanocages are investigated. The V and C of C, C, and Ge as anodes of batteries are investigated. The results of this paper proposed the nano materials (C and Ge nanocage) as anodes of Na-IB and K-IB with higher C and V than graphene nanosheet.