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✦   LIBER   ✦

Electrochemical and structural characteristics of niobium(V) oxide in a rechargeable lithium battery

✍ Scribed by N. Kumagai; I. Ishiyama; K. Tanno

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
368 KB
Volume
20
Category
Article
ISSN
0378-7753

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✦ Synopsis

The discharge behaviour of T-Nb20, in various electrolytes is unaffected by the choice of solvent, but is strongly dependent on the crystal radius of the solute cation species. Thermodynamic and structural studies show that this is due to the insertion of unsolvated Li+ ions into the crystal lattice. The graphite content of the NbzOS electrode has a marked influence on the cycling behaviour on account of the decrease in the oxide conductivity with discharge. Furthermore, the chemical diffusion coefficient of Li+ ions in Nb*Os is about lo-lo cm2 s-l, which is one order of magnitude smaller than that in V20s with a layered structure.

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