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Cobalt Additives Influence on Phase Composition and Defect Structure of Manganese Dioxide Prepared from Fluorine Containing Electrolytes.
- Source :
-
Acta Physica Polonica: A . Jan2010, Vol. 117 Issue 1, p86-90. 4p. 1 Black and White Photograph, 2 Charts, 2 Graphs. - Publication Year :
- 2010
-
Abstract
- Manganese dioxide samples were prepared from fluorine containing electrolytes with additives of Co2+ ions. Atomic absorption spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis were the methods of the samples characterisation. Manganese dioxide at the presence of cobalt forms nanosized ramsdellite structure crystallites of mostly needle-like morphology with significant content of hydroxide groups. The main phase state in manganese dioxide samples obtained at the presence of cobalt is γ-MnO2 with ramsdellite structure and low content of intergrowth defects. The sample doped both with lithium and cobalt can be indexed to a hollandite-type structure (tetragonal; space group I4=m) of α-MnO2. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 05874246
- Volume :
- 117
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Acta Physica Polonica: A
- Publication Type :
- Academic Journal
- Accession number :
- 48924763
- Full Text :
- https://doi.org/10.12693/APhysPolA.117.86