Organic small-molecule compounds have become promising cathode materials for high-performance lithium-ion batteries (LIBs) due to their high theoretical capacity, efficient utilization of active sites, low-cost, and sustainability. However, severe dissolution and poor electronic conductivity limit their further practical applications. Herein, we have synthesized an insoluble organic small-molecule, ferrocenyl-3-(λ1-azazyl) pyrazinly [2,3-f] [1,10] phenanthrolino-2-amine (FCPD) by grafting ferrocene onto pyrazino[2,3-f] [1,10] phenanthroline-2,3-diamine (PPD). The combination of ferrocene (p-type Fe2+ moiety) and PPD (n-type C=N groups) in a bipolar manner endows the target FCPD cathode with an increased theoretical capacity and a wide voltage window. The highly conjugated π-π aromatic skeleton inside enhances FCPD’s electron delocalization and promotes strong interaction between FCPD units. Additionally, the mesoporous structure within the FCPD can provide numerous electroactive sites, contact area, and ion diffusion channels. Benefiting from the bipolar feature, aromatic, and mesoporous structure, the FCPD cathode demonstrates a large capacity of 250 mAh g−1 at 0.1 A g−1, a long lifespan of 1000 cycles and high-rate capability of 151 mAh g−1 at 5 A g−1 along with a wide voltage window (1.2-3.8 V). Additionally, in-situ synchrotron FT-IR and ex-situ XPS reveal its dual ions storage mechanism in-depth. Our findings provide essential insights into exploring the molecular design of advanced organic small-molecule.