Ka. Striebel et al., ELECTROCHEMICAL-BEHAVIOR OF LIMN2O4 AND LICOO2 THIN-FILMS PRODUCED WITH PULSED-LASER DEPOSITION, Journal of the Electrochemical Society, 143(6), 1996, pp. 1821-1827
Thin films of LixMn2O4 and LixCoO2 have been prepared by pulsed laser
deposition on heated stainless steel substrates. These films have thic
knesses from 0.2 to 1.5 mu m and are crystalline without postdepositio
n annealing. The films' electrochemical properties were studied with c
yclic voltammetry, current pulse measurements, and galvanostatic charg
e/discharge techniques. Film capacity densities as high as 56 and 62 m
u Ah/cm(2)-mu m were measured for LixMn2O4 and LixCoO2, respectively.
Chemical diffusivities on the order of 2.5 x 10(-11) and 1 x 10(-10) w
ere measured for LixMn2O4 and LixCoO2, respectively. Some of the films
were cycled electrochemically for up to 300 cycles against lithium me
tal in 1 M LiClO4/propylene carbonate electrolyte, demonstrating the p
romise of pulsed laser deposition for the production of cathode films
for rechargeable lithium microbatteries.