EFFECT OF CARBON NANOTUBES ADDITION ON THE ANODE PERFORMANCES OF FLAKE GRAPHITE FOR LITHIUM-ION BATTERY

摘要

A comparative investigation was carried out on carbon black and multiwalled carbon nanotubes as conductive additives in spherical natural flake graphite as an anode material for rechargeable lithium-ion batteries. Scanning electron microscopy images showed that carbon nanotubes interlaced graphite powders in series to form a three-dimensional network structure. The constant current charge-discharge experiment showed that carbon nanotubes were more effective to improve reversible capacity and cycle stability. The discharge capacity was improved to be 384 mAh/g in the first cycle. The cycle stability was improved 47.5% compared with the bare sample. The research is of potential interest to the application of carbon nanotubes as a conductive additive in anode materials for high-power lithium-ion battery.