Electrochemical Properties and Kinetics of Asymmetric Sodium Benzene‐1,2,4‐tricarboxylate as an Anode Material for Sodium‐Organic Batteries.

Organic carboxylates are well‐accepted as low‐cost anodes for sodium‐ion batteries, owing to their abundant natural resources, structural versatility and suitable potentials. In this work, sodium benzene‐1,2,4‐tricarboxylate (Na‐1,2,4‐BTC), featured as an asymmetric carboxylic‐based coordination salt, is studied as a Na storage anode. The sodium ions exhibit diffusion‐controlled behavior involving the enolization of the C=O groups in Na‐1,2,4‐BTC. Meanwhile, benefiting from its robust organic‐metal coordination framework and fast charge transfer properties, the as‐prepared Na‐1,2,4‐BTC delivers a high initial desodiation capacity of 258 mA h g−1, outstanding rate capability at 2 A g−1 and remarkable cyclability over 500 cycles, demonstrating a great potential as Na‐organic battery anode with high performance and low cost. [ABSTRACT FROM AUTHOR]