TY - JOUR
T1 - Mesoporous MnO2 synthesized by using a tri-block copolymer for electrochemical supercapacitor studies
AU - Nayak, Prasant Kumar
AU - Munichandraiah, N.
PY - 2011/8
Y1 - 2011/8
N2 - Mesoporous MnO2 is prepared from KMnO4 by using a tri-block copolymer, namely, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEG-PPG-PEG) as a reducing as well as a structure-directing agent. The as synthesized MnO2 samples are poorly crystalline with mesoporosity having pore diameter between 8 and 40 nm. BET surface area as high as 273 m2 g-1 is obtained. By heating, the poorly crystalline MnO2 turns into a well crystalline form at 400 °C with nanorod morphology. However, the surface area decreases for the heated samples. Samples of MnO2 prepared by varying the ratio of KMnO4 and the copolymer, and also the heated samples are subjected to electrochemical characterization for supercapacitor studies. High specific capacitance values on mass basis are obtained for the as prepared mesoporous MnO2 samples.
AB - Mesoporous MnO2 is prepared from KMnO4 by using a tri-block copolymer, namely, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEG-PPG-PEG) as a reducing as well as a structure-directing agent. The as synthesized MnO2 samples are poorly crystalline with mesoporosity having pore diameter between 8 and 40 nm. BET surface area as high as 273 m2 g-1 is obtained. By heating, the poorly crystalline MnO2 turns into a well crystalline form at 400 °C with nanorod morphology. However, the surface area decreases for the heated samples. Samples of MnO2 prepared by varying the ratio of KMnO4 and the copolymer, and also the heated samples are subjected to electrochemical characterization for supercapacitor studies. High specific capacitance values on mass basis are obtained for the as prepared mesoporous MnO2 samples.
KW - Manganese oxide
KW - Mesoporous
KW - Specific capacitance
UR - http://www.scopus.com/inward/record.url?scp=79955885866&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2011.03.004
DO - 10.1016/j.micromeso.2011.03.004
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AN - SCOPUS:79955885866
SN - 1387-1811
VL - 143
SP - 206
EP - 214
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1
ER -