Progress in Li2C2O4‐Based Pathway Toward Low‐Polarization Li–CO2 Batteries

Li–CO 2 batteries represent a promising electrochemical system that integrates energy storage with CO 2 conversion, making them one of the most prominent areas of current research. However, Li–CO 2 batteries following the conventional Li 2 CO 3 ‐based pathway generally suffer from large overpotentials and low energy efficiency. Recently, an alternative Li 2 C 2 O 4 ‐based pathway has been reported, demonstrating great potential to reduce discharge/charge polarization and enhance reversibility. This review provides a comprehensive overview of Li–CO 2 batteries based on the Li 2 C 2 O 4 pathway. It begins with a discussion of the fundamental reaction mechanisms associated with Li 2 C 2 O 4 formation and decomposition. Subsequently, recent progress in catalyst design and electrolyte optimization is summarized sequentially, particularly focusing on inherent correlations between interfacial electrochemical behaviors and battery performance. Finally, future research directions are outlined to guide further advancements in this emerging area.