Reduction of the irreversible capacity of a graphite anode by the CVD process

The irreversible capacity of a graphite anode was reduced by CVD coating of carbon from a 5% ethylene in Ar gas at temperatures from 700 to 1000 degre esC. The amount of carbon coated on the graphite powder, surface area of th e resultant powder and its electrochemical characteristics depend on deposi tion parameters. The surface area was reduced by similar to 10% and coulomb ic efficiency increased by 5 to 92% for the graphite powders coated with ca rbon at 800 degreesC. The influence of the deposition temperature on the el ectrode performance has been discussed based on the physical and electroche mical analysis. (C) 2001 Elsevier Science Ltd. All rights reserved.