The growing concern over global warming and its detrimental effects on the environment has intensified the search for sustainable solutions to address the issue of CO2 emissions. The primary contributor to global warming is the burning of fossil fuels, which releases significant amounts of CO2 into the atmosphere. To secure a sustainable future for generations to come and protect the environment, modern society has a crucial responsibility to restore the natural balance. This entails closing the anthropogenic carbon cycle and establishing a sustainable energy flow. To mitigate the impact of CO2 emissions, one approach is the electrification of the transportation sector, aiming to reduce reliance on fossil fuel-powered vehicles. The metal-CO2 batteries offer a promising avenue for the valorization of CO2 through producing green electricity. Li-CO2 batteries have garnered interest as a potential source of high energy density for electrochemical energy storage systems (ESSs), utilizing the power of CO2. However, the limited availability and geographically localized distribution of lithium, along with its high cost, present significant challenges that hinder the widespread adoption of Li-CO2 batteries. Furthermore, the high reactivity of alkali metals, combined with their propensity for dendrite formation during cycling, gives rise to notable safety concerns, diminishes battery cycle life, and imposes practical limitations on their utility. Considering its high volumetric energy density, excellent safety profile, environmental friendliness, and cost-effectiveness, the rechargeable Mg-CO2 battery is regarded as a promising solution for efficient energy storage and effective CO2 utilization.. The non-aqueous Mg-CO2 battery demonstrates an encouraging prospective, distinguished by its ability to store energy and recycle CO2. However, the development of Mg-CO2 batteries is currently facing significant obstacles, such as limited rate capability, reduced energy efficiency, and shortened cycle life. In addition, despite the conducive factors, there is limited study on Mg-CO2 batteries employing nonaqueous electrolytes or functioning without any assistance from H2O. Thus far, there are only two published works on Mg-CO2 batteries that require the assistance of water to decrease the elevated voltage hysteresis. A nonaqueous rechargeable Mg-CO2 battery with a Mo2C-CNT cathode reveals the role of catalysts in stabilizing MgC2O4 during the initial discharge stages. However, the presence of electronically insulating MgCO3, MgO, and C as discharge products at later stages hinders catalytic activity, resulting in increased charge overpotential, rapid capacity fade, and limited cyclic performance. Moisture-assisted nonaqueous Mg-CO2 batteries with CNT cathodes have shown only 50 cycles of operation due to the accumulation of MgCO3 and C, which negatively impacts discharge/charge reversibility and lead to premature battery failure. Upon thorough examination, it has been determined that the primary obstacles in achieving exceptional non-aqueous Mg-CO2 batteries pertain to four key factors. These include (i) the slow reaction kinetics of CO2RR, (ii) poor reversibility across charging and discharging cycles, (iii) the insulating nature of the final discharge products (MgCO3, MgO, or MgC2O4), which results in an elevated charge overpotential, and (iv) the substantial oxidative decomposition barrier of the final discharge products resulting in their aggregation on the electrode surface, which impacts electrochemical activity and increases interfacial resistance. Despite extensive research in developing cathode catalysts for alkali metal-CO2 batteries, they cannot be directly applied in Mg-CO2 batteries due to distinct reaction mechanisms between bivalent Mg and CO2, as well as slower redox kinetics in organic electrolytes. Therefore, a major research focus for the realization of Mg-CO2 batteries involves the strategic development of bi-functional cathode catalysts.