Electrochemical Behavior of Fluorinated Fullerenes  C 60 F  x and  C 70 F  x

Abstract

Electrochemical properties of C60F46 and C70F5, have been studied by cyclic voltammetry (CV) in CH2CI2 containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF6). The electrochemical reductions of C70F54 are reported for the first time. The reduction potential of C70F is more positive than that of C70 by 1.57 V. The differences in electrochemical properties between C70F and 073 are parallel to the differences between C60F, and C. Based on the relationship between the reduction potential and electron affinity (Ea), the E, of C70F54 is estimated to be Ca. 4.42 eV, which is 1.76 eV larger than that of 075.

The Characterization of LiMn2O4 Thin Film Cathode for Lithium Rechargeable Microbattery Prepared by Liquid Source Misted Chemical Deposition

“…This arrangement increases repulsion between the lithium ions, resulting in a small increase in the free energy drop, 100 mV. [24] This is the origin of the difference in potential between the two potential plateaux. Figure 7 shows the effect of the crystallization temperature on the discharge capacity of the LiMn 2 O 4 thin film vs. cycle number, evaluated from the voltage profiles.…”

NMR and FT-IR Investigation of Spinel LiMn2O4 Cathode Prepared by the Tartaric Acid Gel Process

“…Several techniques, such as sol}gel (9), coprecipitation (10), melt impregnation (11), the citric acid method (12,13), the tartaric acid method (14,15), and the Pechini process (16), have been developed. LiMn O powder synthesis by the tartaric acid gel process using lithium acetate and manganese acetate as the lithium and manganese sources has been shown to be an inexpensive method with great potential.…”

A new approach to improve the electrochemical performance of ZnMn2O4 through a charge compensation mechanism using the substitution of Al3+ for Zn2+

“…However, in these cases, consumers want the vehicles to have a long cruising mileage and good safety, which requires LIBs with enhanced performance in terms of their energy density and safety. [1][2][3][4] Most commercial LIBs still use graphite as the anode material due to its low cost, stable capacity, and long cycle life. 5 However, the structure of graphite means that its theoretical capacity is only 372 mA h g À1 and the practical capacity is near to 360 mA h g À1 .…”