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The Composite Effect of Nanometer MnO2 Mixed with the Electrolytic MnO2
- Source :
- Journal of China University of Geosciences. 18:172-176
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- The nanometer MnO2 has outstanding electrochemical performance theoretically, but it is not suitable for actual utilization, which may result in capacity decrease and resource waste. In this study we have utilized the characterizations of the nanometer material, synthesized a type of nanometer α-MnO2 through KMnO4 and KNO3 with hydrothermal method, and mixed the products into micron electrolytic manganese dioxide (EMD) to enhance the electrochemical performance of the electrode. The cyclic voltammogram and galvanostatical discharge measurements of the samples were investigated. It is found that the 50% nanometer MnO2 mixed electrode has the best electrochemical performance. The electrochemical performance improvement mechanism of the sample nanometer MnO2 mixed into micron EMD was discussed. With the existence of electrolyte, the nanometer MnO2 particles filled into the interspaces of the micron EMD particles, the mass and charge transfer conditions of the electrode reaction were improved, and the electrode polarization was diminished.
- Subjects :
- Materials science
Discharge measurements
Analytical chemistry
chemistry.chemical_element
Manganese
Electrolyte
Electrochemistry
Hydrothermal circulation
chemistry
Chemical engineering
Electrode
Earth and Planetary Sciences (miscellaneous)
General Earth and Planetary Sciences
Nanometre
Composite effect
Subjects
Details
- ISSN :
- 10020705
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- Journal of China University of Geosciences
- Accession number :
- edsair.doi...........4fdad0b096ccbd1ebd38d3f879a2837d