The ongoing increase in atmospheric carbon dioxide (CO₂)—the main anthropogenic greenhouse gas—is one of the most critical indicators of the planet’s energy imbalance. Emissions from fossil fuel combustion are the primary driver of global warming, with direct consequences for the climate and the stability of ecosystems. Therefore, the decarbonization of the energy system has become a global priority, requiring a steady transition toward renewable sources and high-efficiency, low-emission processes. However, the intrinsic intermittency of major renewable sources such as solar and wind energy demands the development of sustainable storage technologies capable of managing energy surpluses and reducing dependence on fossil fuels.