The electrochemical properties of LiCr 0.1 Mn 1.9 O 4 as a cathode material in five electrolyte solutions , LiPF 6/EC+DEC, LiPF 6/EC+EMC, LiPF 6/EC+DME, LiPF 6/EC+DMC and LiBF 4/ EC+ DMC have been studied. The initial capacity values were very close each to other for the electrolyte solutions examined. However, the capacity fading and self discharge data obtained from the cells with above electrolyte solutions were different in the order of LiPF 6/EC+DME>LiPF 6/EC+EMCLiPF 6/EC+DMC≈LiPF 6/EC+DEC≈LiBF 4/EC+DMC. Decrease of the electrochemical properties was attributed mainly to the electrolyte decompositions on the surface of the electrodes. LiPF 6/EC+DEC, LiPF 6/EC+DMC and LiBF 4/EC+DMC appeared electrolytes well compatible with LiCr 0.1 Mn 1.9 O 4 electrode.
The potentiostatic intermittent titration technique(PITT) method was used to determine lithium ion diffusion coefficients in graphitized carbon fiber anode material as function of potentials. The plot of lg D vs E shows that the value of lithium ion coefficients in graphitized carbon fiber anode material has three minima, the least value obtained is 1 9×10 -13 cm 2/s.
