It has been shown in Part I of this work that (Mo0.3V0.7)2O5 has an electrochemical behaviour different from that of V2O5. The two oxides have similar structures, with the MO6 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 V2O5, in an elongation of the weak VO bond along (010) and eventual bone breaking for x > 1 in LixV2O5. By contrast, (Mo0.3V0.7)2O5 can incorporate more than 2 Li+/mole in its cavities without substantial structure reorganization and with only 10% expansion of the cell. Li/(Mo0.3V0.7)2O5 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.
(Mo0.3V0.7)2O5 as a solid solution cathode for Li cells. Part. II°. Structure characteristies and secondary cells / Pasquali, Mauro; G., Pistoia; F., Rodante. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 7:2(1981), pp. 145-152.
(Mo0.3V0.7)2O5 as a solid solution cathode for Li cells. Part. II°. Structure characteristies and secondary cells.
PASQUALI, Mauro;
1981
Abstract
It has been shown in Part I of this work that (Mo0.3V0.7)2O5 has an electrochemical behaviour different from that of V2O5. The two oxides have similar structures, with the MO6 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 V2O5, in an elongation of the weak VO bond along (010) and eventual bone breaking for x > 1 in LixV2O5. By contrast, (Mo0.3V0.7)2O5 can incorporate more than 2 Li+/mole in its cavities without substantial structure reorganization and with only 10% expansion of the cell. Li/(Mo0.3V0.7)2O5 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
