Electrochemical tests on the spinel Li[V2]O4 were carried out in lithium cells. The recharge efficiency was measured for x less-than-or-equal-to 2.1 in 'Li1+xV2O4' where 'Li1+xV2O4' refers to the overall composition of the working electrode and not necessarily to a single-phase product; the efficiency amounts to 80-85% for compositions ranging between 0.5 less-than-or-equal-to x less-than-or-equal-to 1.8. A cycling experiment carried out at the C/2 rate in prototype lithium cells showed that an almost constant capacity of approximately 0.10 A h g-1 could be sustained for nearly 500 cycles, using voltage limits of 1.8 V and 3.0 V. A cell cycled at -10-degrees-C at the C/4 rate delivered a constant capacity of approximately 0.08 A h g-1 over 75 cycles; this corresponds to 73% of the ambient temperature performance.
FURTHER ELECTROCHEMICAL STUDIES ON LI/LIV2O4 SECONDARY CELLS / G., Pistoia; Pasquali, Mauro; L. A., Depicciotto; M. M., Thackeray. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 34:3(1991), pp. 199-206. [10.1016/0378-7753(91)80087-e]
FURTHER ELECTROCHEMICAL STUDIES ON LI/LIV2O4 SECONDARY CELLS
PASQUALI, Mauro;
1991
Abstract
Electrochemical tests on the spinel Li[V2]O4 were carried out in lithium cells. The recharge efficiency was measured for x less-than-or-equal-to 2.1 in 'Li1+xV2O4' where 'Li1+xV2O4' refers to the overall composition of the working electrode and not necessarily to a single-phase product; the efficiency amounts to 80-85% for compositions ranging between 0.5 less-than-or-equal-to x less-than-or-equal-to 1.8. A cycling experiment carried out at the C/2 rate in prototype lithium cells showed that an almost constant capacity of approximately 0.10 A h g-1 could be sustained for nearly 500 cycles, using voltage limits of 1.8 V and 3.0 V. A cell cycled at -10-degrees-C at the C/4 rate delivered a constant capacity of approximately 0.08 A h g-1 over 75 cycles; this corresponds to 73% of the ambient temperature performance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
