掺磷酚醛树脂炭用作锂离子电池负极的研究

以添加不同含量的五氧化二磷的热塑性酚醛树脂为前驱体,经热固化后升温至600～1600℃下热裂解制备掺磷树脂裂解炭.元素分析、氮气物理吸附和X射线衍射分别考察了裂解炭的元素组成、BET比表面积以及微晶结构变化;恒定电流充放电技术研究了裂解炭的充放电性能.研究发现五氧化二磷的加入使得树脂裂解炭的微晶结构发生了很大改变:随着磷掺杂量的增加,树脂炭的微晶层间距减小,微晶变得更加无序;BET比表面积先减小而后增加;放电容量先增加而后减小,当其含量为 9wt％时,放电容量达到最大值（528mA·h·g^-1）,是掺杂前（230mA·h·g^-1）的2倍多.

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 528mA·h·g^-1 which is higher than that of non-phosphorus doped phenolic pyrolysis resin carbon (230 mA·h·g^-1)