Synthesis and Characterization of MnO2-Based Mixed Oxides as Supercapacitors

Mn/Pb and Mn/Ni mixed oxide were prepared at ambient temperature by reduction of KMnO4 with Mn, Pb, and Ni salts. This low-temperature approach provides amorphous structure of the active material. The specific capacitance of pure MnO 2 was estimated to be 166 F/g and increased to 210 and 185 F/g for Mn/Ni and Mn/Pb oxides, respectively. The carbon loading was optimized at 20 wt %. Based on a single electrode, the Mn/Ni mixed oxide showed a high rate capability of 3.12 Wh/kg at constant power discharge of 1 kW/kg.

[1]  Marc A. Anderson,et al.  Porous Nickel Oxide/Nickel Films for Electrochemical Capacitors , 1996 .

[2]  B. Popov,et al.  Characterization of hydrous ruthenium oxide/carbon nanocomposite supercapacitors prepared by a colloidal method , 2002 .

[3]  B. Conway.  Transition from “Supercapacitor” to “Battery” Behavior in Electrochemical Energy Storage , 1991 .

[4]  Gunter Gutmann,et al.  Hybrid electric vehicles and electrochemical storage systems — a technology push–pull couple , 1999 .

[5]  John B. Goodenough,et al.  Supercapacitor Behavior with KCl Electrolyte , 1999 .

[6]  J. Weidner,et al.  An Electrochemical Route for Making Porous Nickel Oxide Electrochemical Capacitors , 1997 .

[7]  S. W. Kim,et al.  Expansion of Active Site Area and Improvement of Kinetic Reversibility in Electrochemical Pseudocapacitor Electrode , 2001 .

[8]  B. Conway,et al.  The role and utilization of pseudocapacitance for energy storage by supercapacitors , 1997 .

[9]  Terrill B. Atwater,et al.  Fuel cell/electrochemical capacitor hybrid for intermittent high power applications , 1999 .

[10]  J. A. Ritter,et al.  Characterization of Sol‐Gel‐Derived Cobalt Oxide Xerogels as Electrochemical Capacitors , 1998 .

[11]  J. Prakash,et al.  Performance investigations of Pb2Ru2O6.5 oxide based pseudocapacitors , 2001 .

[12]  Jim P. Zheng,et al.  Hydrous Ruthenium Oxide as an Electrode Material for Electrochemical Capacitors , 1995 .

[13]  Jim P. Zheng,et al.  Ruthenium Oxide‐Carbon Composite Electrodes for Electrochemical Capacitors , 1999 .

[14]  Arumugam Manthiram,et al.  Amorphous Ruthenium‐Chromium Oxides for Electrochemical Capacitors , 1999 .

[15]  J. Garche,et al.  Strontium ruthenate perovskite as the active material for supercapacitors , 1999 .

[16]  Debra R. Rolison,et al.  Structure of Hydrous Ruthenium Oxides: Implications for Charge Storage , 1999 .

[17]  B. V. Tilak,et al.  Materials for electrochemical capacitors: Theoretical and experimental constraints , 1996 .

[18]  Jim P. Zheng,et al.  A New Charge Storage Mechanism for Electrochemical Capacitors , 1995 .

[19]  A. F. Burke.  HYBRID/ELECTRIC VEHICLE DESIGN OPTIONS AND EVALUATIONS , 1992 .

[20]  A. Burke,et al.  Material Characteristics and the Performance of Electrochemical Capacitors for Electric/Hybrid Vehicle Applications , 1995 .