Carbon-coated fluorinated graphite for high energy and high power densities primary lithium batteries

The electrochemical performances of fluorinated graphite have been improved by coating a uniform carbon layer on commercial CF(x) (x = 1) powder used as cathode material in lithium battery. In comparison with the cell using un-coated CF(x) as cathode, the cell using carbon coated CF(x) cathode has a higher energy density and higher power density, particularly at higher discharge current rates (1C above). This is because the conductive carbon coating provides the exterior connectivity between particles for facile electron conduction, resulting in high rate performance. (C) 2009 Elsevier B.V. All rights reserved.