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The electroactive organic materialsare promising alternativesto inorganic electrode materials for the new generation of green Li-ionbatteries due to their sustainability, environmental benignity, andlow cost. Croconic acid disodium salt (CADS) was used as Li-ion batteryelectrode, and CADS organic wires with different diameters were fabricatedthrough a facile synthetic route using antisolvent crystallizationmethod to overcome the challenges of low electronic conductivity ofCADS and lithiation induced strain. The CADS nanowire exhibits muchbetter electrochemical performance than its crystal bulk materialand microwire counterpart. CADS nanowire with a diameter of 150 nmdelivers a reversible capability of 177 mAh g–1ata current density of 0.2 C and retains capacity of 170 mAh g–1after 110 charge/discharge cycles. The nanowire structure also remarkablyenhances the kinetics of croconic acid disodium salt. The CADS nanowireretains 50% of the 0.1 C capacity even when the current density increasesto 6 C. In contrast, the crystal bulk and microwire material completelylose their capacities when the current density merely increases to2 C. Such a high rate performance of CADS nanowire is attributed toits short ion diffusion pathway and large surface area, which enablefast ion and electron transport in the electrode. The theoreticalcalculation suggests that lithiation of CADS experiences an ion exchangeprocess. The sodium ions in CADS will be gradually replaced by lithiumions during the lithiation and delithiation of CADS electrode, whichis confirmed by inductively coupled plasma test. [ABSTRACT FROM AUTHOR]