Abstract
Electrochemical storage systems are an enabling solution for the electric system ecological transition, allowing a deeper penetration of nonprogrammable renewable energy resources, such as wind and solar energy. Lithium-ion batteries (LIBs) are state of the art energy storage technology. Nevertheless, LIBs show critical problems linked to their production, especially for what concerns energy consumption, greenhouse gas emissions, and rare raw materials use. Finding alternative storage technologies seems crucial for support energy transition, but at the same time, it is important to study their sustainability from the very beginning of their technological development. Using this framework, this paper presents a life cycle based environmental-economic assessment, comparing Na-ion coin cells (Ti1Al1TiC1.85 MXene as anode material) with LIBs. LCA results show that the assessed Sodium-ion batteries (SIBs) are less environmentally friendly than LIBs, an outcome driven by the SIBs’ lower energy density. However, if results are shown by mass, SIBs can represent potential alternatives to LIBs. On the other hand, the analysis shows that even Na-ions already use less critical resources, both in absolute and in relative values, highlighting the need, at least for the European Union, to find valid alternatives to LIBs if the 2050 decarbonization targets are to be met.
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