A Porphyrin Complex as a Self-Conditioned Electrode Material for High-Performance Energy Storage

Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10341-10346. doi: 10.1002/anie.201702805. Epub 2017 Jul 19.


The novel functionalized porphyrin [5,15-bis(ethynyl)-10,20-diphenylporphinato]copper(II) (CuDEPP) was used as electrodes for rechargeable energy-storage systems with an extraordinary combination of storage capacity, rate capability, and cycling stability. The ability of CuDEPP to serve as an electron donor or acceptor supports various energy-storage applications. Combined with a lithium negative electrode, the CuDEPP electrode exhibited a long cycle life of several thousand cycles and fast charge-discharge rates up to 53 C and a specific energy density of 345 Wh kg-1 at a specific power density of 29 kW kg-1 . Coupled with a graphite cathode, the CuDEPP anode delivered a specific power density of 14 kW kg-1 . Whereas the capacity is in the range of that of ordinary lithium-ion batteries, the CuDEPP electrode has a power density in the range of that of supercapacitors, thus opening a pathway toward new organic electrodes with excellent rate capability and cyclic stability.

Keywords: energy storage; materials science; porphyrinoids; rechargeable batteries; self-conditioning electrodes.

Publication types

  • Research Support, Non-U.S. Gov't