Imine-linked triazine-based conjugated microporous polymers/carbon nanotube composites as organic anode materials for lithium-ion batteries

Redox-active conjugated microporous polymers (RCMPs) have shown tremendous development potential for application in lithium-ion batteries (LIBs) in view of their chemical flexibility, environmental friendliness, and cost effectiveness. However, key problems including fewer exposed redox-active sites and poor electronic conductivity restrict their wide application in LIBs. Herein, two imine-linked triazine-based CMPs are integrated separately with the carbon nanotubes (CNT) using the in situ growth strategy ([email protected] and [email protected]) and then used as the anode materials for LIBs. In view of large conjugate structure, more exposed active sites, and resilient and accessible pores network, the optimum [email protected] as organic anode-active materials for LIBs shows a longer cycling stability (a specific capacity of 350.9 mAh g−1 after 2000 cycles at 1 A g−1) and better rate capability (177.9 mAh g−1 at 5 A g−1) in LIBs. This study provides a reasonable molecular design strategy for developing organic electrode-active materials for lithium-organic batteries.