The second part applies the KVIK optimisation routine to parametrise a reactive force field for metallic electrode materials. The ReaxFF potential function for Li-Li, Na-Na, and Li-Na interactions demonstrate excellent agreement with ab initio based DFT calculations. Finally, the generated force field is used for grand canonical and kinetic Monte Carlo simulations to study the initial growth phenomena on metallic electrode materials. First, thermodynamically controlled growth phenomena on Li and Na nanoparticles was investigated using a ReaxFF/grand canonical Monte Carlo (GCMC) approach. Then, the influence of kinetics on the surface growth of Li(100) and Na(100) was studied within the framework of kinetic Monte Carlo (kMC) simulations.