%0 Journal Article
%T Capacitive Properties of Mesoporous Mn-Co Oxide Derived from a Mixed Oxalate
%A Yong Yan
%A Bingcai Wu
%A Cuihong Zheng
%A Daolai Fang
%J Materials Sciences and Applications
%P 377-383
%@ 2153-1188
%D 2012
%I Scientific Research Publishing
%R 10.4236/msa.2012.36054
%X A mesoporous Mn-Co oxide for supercapacitors was derived from a mixed oxalate Mn0.8Co0.2C2O4nH2O, which was synthesized by a solid-state coordination reaction at room temperature. The synthesized mixed Mn-Co oxalate was decomposed in air at 250C, resulting in a tetragonal spinel Mn-Co oxide with a primary particle size less than 100 nm. The obtained Mn-Co oxide presents a mesoporous texture with a specific surface area of 120 m2g1. Electrochemical properties of the Mn-Co oxide electrode were investigated by cyclic voltammetry and galvanostatic charge/discharge in 6 molL1 KOH electrolyte. The Mn-Co oxide electrode delivered specific capacitances of 383 and 225 Fg1 at scan rates of 2 and 50 mVs1, respectively. Subjected to 500 cycles at a current density of 1.34 Ag1, the symmetrical Mn-Co oxide capacitor showed specific capacitance of 179 Fg1, still retaining ~85% of its initial capacitance. The obtained Mn-Co oxide material showed good capacitive performance, which was promising for supercapacitor applications.
%K Supercapacitors
%K Manganese Oxide
%K Solid-State Reaction
%K Cyclic Voltammetry
%K Capacitive Performance
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=19835