A new benzimidazole based covalent organic polymer having high energy storage capacity

We report the synthesis of a new benzimidazole-based covalent organic polymer (TpDAB) via solvothermal Schiff base condensation between 1,3,5-triformylphloroglucinol (Tp) and 3,3'-diaminobenzidine (DAB). TpDAB showed high energy storage capacity with a specific capacitance of 335 F g(-1) at 2mV s(-1) scan rate and good cyclic stability with 93% retention of its initial specific capacitance after 1000 cycles.