Phenolic Resin Pyrolysis Carbon Phosphorus-Doped as Anode for Lithium Ion Battery

Phosphorus-doped phenolic resin pyrolysis carbon was prepared by low temperature (600-1600℃)pyrolysis of thermoplastic phenolic resin containing different amounts of phosphorus pentoxide after curing. Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction pattern and constant-current charge-discharge properties of pyrolysis carbon were studied. The results show that the pyrolysis carbon microstructure is out of order with the increasing of content phosphorus pentoxide, and BET surface area decreases firstly and then increases, otherwise, the discharge reversible capacity increases firstly and then decreases. The discharge reversible capacity of pyrolytic carbon containing 9wt% phosphorus pentoxide is 528m A·h·g-1 which is higher than that of non-phosphorus doped phenolic pyrolysis resin carbon (230 mA·h·g-1).