PNNL

Abstract

Magnesiumlithium (MgLi) hybrid batteries consist of a Mg metal anode, a Li+ intercalation cathode and dual-salt electrolytes with both Mg2+ and Li+ ions. The demonstration of this technology appeared in literatures for few years and great advances have been achieved in terms of electrolytes, various Li cathodes, and cell architectures. Despite excellent battery performances including long cycle life, fast charge/discharge rate, and high Coulombic efficiency, the overall research of MgLi hybrid battery technology is still in its early stage, and also raised some debates on its practical applications. In this regard, we focus on a comprehensive overview of MgLi hybrid battery technologies developed in recent years. Detailed discussion of MgLi hybrid operating mechanism based on experimental results from the literature helps to identify the current status and technical challenges for further improving the performance of MgLi hybrid batteries. Finally, a perspective for MgLi hybrid battery technologies is explored to address strategic approaches for existing technical barriers that needs to be overcome in future research direction.