Electrochemical behavior of a lithium titanium spinel compound synthesized via a sol–gel process

Abstract

The synthesis and the structural features of a mixed lithium titanium spinel Li_4/3Ti_5/3O₄ obtained via a sol–gel process in non-aqueous media are reported. Electrochemical lithium insertion occurs in one reduction process located at 1.550 V, and corresponds to the insertion of 1 Li per Li_4/3Ti_5/3O₄ (150 A h kg^–1) in octahedral sites. During cycling experiments performed at discharge–charge rates of C/20, a stabilization of the specific capacity around 105 A h kg^–1 (0.7 F mol^–1) occurs after the 20th cycle.

References

1. B. Scrosati, J. Electrochem. Soc., 1992, 139, 2776.
2. T. Ohzuku, in Lithium Batteries. New materials, developments and Perspectives, ed. G. Pistoia, Elsevier, Amsterdam, 1994, p. 239.
3. E. Ferg, R. J. Gummow and A. de Kock, J. Electrochem. Soc., 1994, 141, L147.
4. K. M. Colbow, J. R. Dahn and R. R. Haering, J. Power Sources, 1989, 26, 397.
5. T. Ohzuku, A. Ueda and N. Yamamoto, J. Electrochem. Soc., 1995, 142, 1431.
6. T. Ohzuku, A. Ueda, N. Yamamoto and Y. Iwakoshi, J. Power Sources, 1995, 54, 99.
7. S. Bach, J. P. Pereira-Ramos, N. Baffier and R. Messina, Electrochim. Acta, 1991, 36, 1595.
8. J. P. Pereira-Ramos, R. Baddour, S. Bach and N. Baffier, Solid State Ionics, 1992, 53–56, 701.
9. J. P. Pereira-Ramos, S. Bach, J. Farcy and N. Baffier, Mater. Res. Soc. Symp. Proc., 1995, 369, 191.
10. J. Livage, M. Henry and C. Sanchez, Prog. Solid State Chem., 1988, 18, 259.
11. J. Livage, J. Solid State Chem., 1986, 64, 322.
12. J. E. Mark, Heter. Chem. Rev., 1996, 3, 307.
13. K. S. Mazdiyasni, Ceram. Int., 1982, 8, 42.
14. H. Dislich and E. Hussmann, Thin Solid Films, 1981, 77, 129.