BODIPY-Based Conjugated Porous Polymer and Its Derived Porous Carbon for Lithium-Ion Storage

Conjugated porous polymers (CPPs) possess great potential in the energy storage aspect. In this work, a boron-dipyrromethene (BODIPY)-conjugated porous polymer (CPP-1) is achieved by a traditional organic synthesis route. Following this, a carbonization process is employed to obtain the carbonized porous material (CPP-1-C). The two as-prepared samples, which are characterized by doping with heteroatoms and their porous structure, are able to shorten the lithium-ion pathways and improve the lithium-ion storage property. Then, CPP-1 and CPP-1-C are applied as anode materials in lithium-ion batteries. As expected, long-term cyclic performances at 0.1 and 1 A g^-1 are achieved with maintaining the specific capacity at 273.2 mA h g^-1 after 100 cycles at 0.1 A g^-1 and 250.8 mA h g^-1 after 300 cycles at 1 A g^-1. The carbonized sample exhibits a better electrochemical performance with a reversible specific capacity of 675 mA h g^-1 at 0.2 A g^-1. Moreover, the capacity is still stabilized at 437 mA h g^-1 after 500 cycles at 0.5 A g^-1. These results demonstrate that BODIPY-based CPPs are capable of being exploited as promising candidates for electrode materials in the fields of energy storage and conversion.