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Electrochemical insertion of lithium in manganese dioxide

✍ Scribed by Jiří Vondrák; Ivo Jakubec; Jana Bludská

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
350 KB
Volume
14
Category
Article
ISSN
0378-7753

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✦ Synopsis

The insertion of lithium into compact electrolytic MnOz was studied by galvanostatic and admittance techniques.

The diffusion coefficient, 3.4 X lo-l4 m'/s at 20 'C, and its activation energy of 30 kJ were determined. The rate of the process is controlled mainly by the high resistivity of MnO, and by the polarization of the electrode reaction itself. Similarly, the behaviour of Mn02-C plastic bonded electrodes is controlled mainly by the high resistivity of MnO, if the content of carbon black is not sufficient to form a conductive network, and by polarization on the grains of MnOz at higher carbon black contents.

The optimum concentration of carbon is 30 -40% by volume.

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