(Mo0.3V0.7)2O5 as a solid solution cathode for Li cells: Part II. Structural characteristics and secondary cells
✍ Scribed by M. Pasquali; G. Pistoia; F. Rodante
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 433 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0378-7753
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✦ Synopsis
It has been shown in Part I of this work that (Mo0~sV0.,)z05 has an electrochemical behaviour different from that of VzO,. The two oxides have similar structures, with the MOs octahedra linked by corner and edge sharing to form interconnected zig-zag chains. These structures can incorporate Li+ ions in bicapped cuboctahedron cavities of perovskite-type. This results, for VZ05, in an elongation of the weak V-O bond along (010) and eventual bone breaking for x > 1 in Li,Vs05. By contrast, (M~e.sV~.~)zOs can incorporate more than 2 Li+/mole in its cavities without substantial structure reorganization and with only 10% expansion of the cell. Li/(Mo0.sV0.,)z05 cells are rechargeable and more than 100 cycles were achieved at 0.5 -1.0 mA/cm2. After the 2nd cycle some structural alterations are produced which remain almost unchanged during further cycling.