Because of their higher energy density, compared to graphite-anode lithium-ion batteries (GLIB), rechargeable lithium-metal batteries (LMB) and silicon-anode lithium ion battery (SLIB) have been considered as the most attractive next-generation energy-storage systems (ESS). A promising approach to improving LMB performance, that has gained interest in recent years, is the use of anode-free lithium-metal batteries (AFLMB). Such battery configuration enables elimination of the problem of using excessive amounts of lithium in LMBs, hence increasing the specific energy of the battery. Furthermore, silicon is a low-cost and environmentally friendly material, and is the second most abundant element in the Earth's crust. Its theoretical capacity of 4200mAh g^-1, is an order of magnitude greater than that of graphite. Nevertheless, the main and most important challenge with both systems is the short cycle life. This work explores the beneficial effects of integrating metal-oxide nanoparticles (MONPs) into the liquid electrolyte of these systems. It was found that the addition to the electrolyte of low concentrations (0.1 to 5%) of MONPs significantly improves coulombic efficiency (CE), capacity retention (CR) and the SEI properties. In both cases, the cycle life was more than doubled.