A coupled polymeric porphyrin complex as a novel cathode for highly stable lithium organic batteries

A highly conjugated polymeric porphyrin with an ethynyl group is proposed as a new cathode for lithium organic batteries. The electrochemical performance is significantly improved after a simple coupled polymerization, resulting in excellent cycling stability with a capacity retention of 99.2% for 2000 cycles. A polymeric porphyrin as a new cathode exhibits both high reversible capacity and long-term cycling stability for lithium organic batteries.