USE OF CARBONS DERIVED FROM THE PYROLYSIS OF POLYPARAPHENYLENE AS ANODE MATERIALS IN SECONDARY ELECTROCHEMICAL LITHIUM-ION BATTERIES

Carbons derived from the pyrolysis of polyparaphenylene at 700 degrees C under various conditions (hydrogen gas, argon gas and vacuum) were characterized by Xray diffraction, infrared and Raman spectroscopies. The affinity of these materials for lithium was tested by electrochemi cal measurements. The reversible capacity depends on the pyrolysis atm osphere. The best performances were obtained with carbons of pyrolyzed PPP under hydrogen gas (x=760 mAh/g).