title: Hierarchical porous carbon/MnO2 hybrids as supercapacitor electrodes.
abstract: Hybrid electrodes of hierarchical porous carbon (HPC) and manganese oxide (MnO2) were synthesized using a fast surface redox reaction of potassium permanganate under facile immersion methods. The HPC/MnO2 hybrids had a number of micropores and macropores and the MnO2 nanoparticles acted as a pseudocapacitive material. The synergistic effects of electric double-layer capacitor (EDLC)-induced capacitance and pseudocapacitance brought about a better electrochemical performance of the HPC/MnO2 hybrid electrodes compared to that obtained with a single component. The hybrids showed a specific capacitance of 228 F g(-1) and good cycle stability over 1000 cycles.
authors.forename: Min Eui
authors.initials: ME
authors.lastname: Lee
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Yun
authors.forename: Hyoung-Joon
authors.initials: HJ
authors.lastname: Jin