Progress of organic carbonyl compounds as electrode materials for sodium−ion batteries

Organic electrode materials are expected to be promising candidates for secondary batteries due to their high capacity, abundant resources, low cost, and structural controllability. Currently, organic electrode materials have been applied in various metal-ion battery systems, but their commercial application is still hindered by a number of issues, including low redox potential, low intrinsic conductivity, and solubility in organic electrolysis. To address the technological bottleneck of organic electrode materials, the modification of organic molecular structure and the improvement of experimental conditions have received considerable attention. This paper reviews the recent research progress, and introduces the redox mechanism and basic properties of organic carbonyl compounds. Finally, it summarizes the current challenges and possible development directions of organic carbonyl compounds, providing a reference for the design and optimization of organic electrode materials in the future.